九州大学 研究者情報
発表一覧
田中 学(たなか まなぶ) データ更新日:2021.10.27

助教 /  工学研究院 化学工学部門 生産システム工学


学会発表等
1. 田中学, 釘宮悠太, 末永拓也, 渡辺隆行, 松浦次雄, ダイオード整流型交流アークを用いたプレーナー型プラズマジェットの発生, 第68回応用物理学会春季学術講演会, 2021.03.
2. 田中学,末永拓也,玉江藍花,渡辺隆行,松浦次雄,上田紹央,東崎英樹, 多相交流アークの変動現象とナノ粒子製造プロセスへの応用, 化学工学会 第86年会, 2021.03.
3. 田中学,釘宮悠太,末永拓也,渡辺隆行,松浦次雄,上田紹央,東崎英樹, 電極消耗低減化に向けたダイオード整流型多相交流アークにおける変動現象, 第38回プラズマプロセシング研究会/第33回プラズマ材料科学シンポジウム, 2021.01.
4. Soon-Ho Kim, Manabu Tanaka, Myeong-Hoon Lee, Takayuki Watanabe, Decomposition of N,N-diethyl-m-toluamide at Atmosphere Pressure by Water Thermal Plasma
, 第38回プラズマプロセシング研究会/第33回プラズマ材料科学シンポジウム, 2021.01.
5. 松井和希, 田中学, 渡辺隆行, ロングDCアークによる六フッ化硫黄の分解機構, 第38回プラズマプロセシング研究会/第33回プラズマ材料科学シンポジウム, 2021.01.
6. Byeong-il Min, Yiran Wang, Xiaoyu Zhang, Manabu Tanaka, and Takayuki Watanabe, Synthesis of 3-Lithium Garnet Solid Electrolyte for All Solid Lithium Ion Battery by Induction Thermal Plasma, 47th IEEE International Conference on Plasma Sciences, 2020.12.
7. Yiran Wang, Xiaoyu Zhang, Byeong-il Min, Manabu Tanaka, and Takayuki Watanabe, Synthesis of Amorphous Oxide Electrolyte Nanoparticles for All-Solid State Battery by Induction Thermal Plasma, 47th IEEE International Conference on Plasma Sciences, 2020.12.
8. Manabu Tanaka, Hiroki Maruyama, Yuta Kugimiya, Takuya Suenaga, Takayuki Watanabe, Tsuguo Ueda, and Hideki Tousaki, Fluctuation Phenomena in Multiphase AC Arc under Nitrogen Atmosphere, 47th IEEE International Conference on Plasma Sciences, 2020.12.
9. Manabu Tanaka, Yuta Kugimiya, Takayuki Watanabe, and Tsugio Matsuura, Planar Thermal Plasma Jet in Diode-Rectified AC Arc System under Atmospheric Pressure, 47th IEEE International Conference on Plasma Sciences, 2020.12.
10. Takayuki Watanabe, Hiroki Munekata, Hiiro Murakami, and Manabu Tanaka, Analysis of discharge characteristics of water thermal plasma with mist generation by high-speed camera, 47th IEEE International Conference on Plasma Sciences, 2020.12.
11. 釘宮悠太、@田中学、渡辺隆行、@松浦次雄、@上田紹央、@東崎秀樹, 窒素雰囲気における多相交流アークの電極蒸発現象の可視化, プラズマ・核融合学会 九州・沖縄・山口支部 第24回 支部大会, 2020.12.
12. Zhengtong Shen, Yuki Takemoto, Masayuki Maekawa, Manabu Tanaka, and Takayuki Watanabe, Arc Temperature Measurement of Nitrogen DC Arc Based on Emission Intensity Ratio Method in Dual Wavelength Ranges, プラズマ・核融合学会 九州・沖縄・山口支部 第24回 支部大会, 2020.12.
13. 末永拓也, 釘宮悠太, 田中学, 渡辺隆行, 大熊崇文, 永井久雄, 小岩崎剛, 丸山大貴, 粉体供給中の多相交流アークにおけるLi金属蒸気の高速度計測, プラズマ・核融合学会 九州・沖縄・山口支部 第24回 支部大会, 2020.12.
14. 玉江藍花, 末永拓也, 釘宮悠太, 田中学, 渡辺隆行, 松浦次雄, 上田紹央, 東崎英樹, 多相交流アークによるLi-Mn系複合酸化物ナノ粒子合成, プラズマ・核融合学会 九州・沖縄・山口支部 第24回 支部大会, 2020.12.
15. Yiran Wang, Byeong-Il Min, Xiaoyu Zhang, Manabu Tanaka, Takayuki Watanabe, Formation Mechanism of Amorphous Li3BO3 Nanoparticles by Induction Thermal Plasma, プラズマ・核融合学会 九州・沖縄・山口支部 第24回 支部大会, 2020.12.
16. Byeong-il Min, Xiaoyu Zhang, Yiran Wang, Manabu Tanaka, Takayuki Watanabe, Synthesis of Li-Sm-W Composite Oxide Nanoparticles by Induction Thermal Plasma, プラズマ・核融合学会 九州・沖縄・山口支部 第24回 支部大会, 2020.12.
17. #末永拓也、田中学、渡辺隆行、@大熊崇文、@永井久雄、@小岩崎剛、@丸山大貴, 多相交流アークにおけるLi原子の励起光を用いた金属蒸気の高速度観測, プラズマ・核融合学会 第37回年会, 2020.12.
18. #松井和希, 田中学, 渡辺隆行, ロングDCアークによる難分解性ガスSF6の分解機構, プラズマ・核融合学会 第37回年会, 2020.12.
19. 田中学, 釘宮悠太, 末永拓也, 玉江藍花, 渡辺隆行, 松浦次雄, 上田紹央, 東崎英樹, 多相交流アークの変動現象とナノ粒子合成への応用, プラズマ・核融合学会 第37回年会, 2020.12.
20. Zhang Xiaoyu, Ririko Hayashida, Byeongil Min, Yiran Wang, Manabu Tanaka, and Takayuki Watanabe, Formation Mechanism of Silicon Nanoparticles with Carbon Coating in Induction Thermal Plasma with Controllable Temperature Distributions, プラズマ・核融合学会 第37回年会, 2020.12.
21. 田中学, 末永拓也, 釘宮悠太, 渡辺隆行, 二波長分光光学系を用いた熱プラズマの新規な温度解析手法の構築, 第36回九州・山口プラズマ研究会, 2020.11.
22. 渡辺隆行,#熊井絵理,@下野芙由美,@田中学,@星野健,@細田聡史,@金森洋史, 連続回転炉および流動層を用いた月土壌の水素還元プロセス, 日本マイクログラビティ応用学会第32回学術講演会, 2020.10.
23. Takafumi Okuma, Hiroki Maruyama, Tomoyuki Imatsuji, Taro Hashizume, Hisao Nagai, Takeshi Koiwasaki, Manabu Tanaka, Takayuki Watanabe, Characterization of Muliphase AC Arc by High-Speed Visualizaion, 4th Asia Pacific Conference on Plasma Physics, 2020.10.
24. 田中学,丸山大貴,末永拓也,渡辺隆行,松浦次雄,上田紹央,東崎英樹, アルゴン-窒素雰囲気における多相交流アークの温度変動解析, 化学工学会第51回秋季大会, 2020.09.
25. 熊井絵理,田中学,渡辺隆行,藤田勇仁,星野健,細田聡史,金森洋史, 連続回転炉を用いた水素還元による酸化タングステンの酸素欠損制御, 化学工学会第51回秋季大会, 2020.09.
26. 村上寛,宗像大貴,田中学,渡辺隆行, 高速度カメラを用いたミスト量調節型水プラズマにおけるアーク変動現象の観察, 化学工学会第51回秋季大会, 2020.09.
27. 釘宮悠太, 末永拓也, 田中学, 渡辺隆行, 松浦次雄, 上田紹央, 東崎英樹, 窒素雰囲気における多相交流アークの電極蒸発機構, 化学工学会第51回秋季大会, 2020.09.
28. Takayuki Watanabe, Hiroki Munekata, Hiiro Murakami, Manabu Tanaka, Thermal Plasma Generation of Water Vapor with Mist as Plasma Supporting Gas, 12th International Symposium on Advanced Plasma Science and Its Applications for Nitrides and Nanomaterials, 2020.03.
29. Tadashi Nonaka, Manabu Tanaka, Takayuki Watanabe, Nanoparticle Synthesis of Cubic Rock-Salt Lithium Oxide with Refractory Metal for Lithium-Ion Battery Electrodes, 7th Korea-Japan Joint Symposium on Advanced Solar Cells, 2020.01.
30. 佐藤理, 小栗康生, 渡辺隆行, 梶原稔尚, 田中学, 奥野敦, 後藤寛文, 岸本高明, 西澤民夫, 中原豊, 橋本照夫, ナノ粒子を用いた透明遮へい材の開発研究, 日本学術振興会プラズマ材料科学第153委員会第144回研究会, 2020.01.
31. Manabu Tanaka, Yuki Saito, Takayuki Watanabe, High-Speed Visualization of Metal Oxide Precursor in Thermal Plasma during Nanoparticle Synthesis Process, Materials Research Meeting 2019, 2019.12.
32. Libei Liu, Yuta Tanoue, Manabu Tanaka, Takayuki Watanabe, Formation Mechanism of Tungsten Boride Nanoparticles by Induction Thermal Plasma, Materials Research Meeting 2019, 2019.12.
33. Manabu Tanaka, Hiroki Maruyama, Yuta Kugimiya, Tsugio Matsuura, Takayuki Watanabe, Generation of Innovative Thermal Plasma with Diode-Rectification Technique, 3rd Asia-Pacific Conference on Plasma Physics, 2019.11.
34. 田中学, 松浦次雄, 渡辺隆行, パワー半導体を用いた革新的熱プラズマ発生の確立, 第35回九州・山口プラズマ研究会, 2019.11.
35. Xiaoyu Zhang, Ririko Hayashida, Manabu Tanaka, Takayuki Watanabe, Effect of Carbon Sources on the Formation Mechanism of Carbon-Coated Silicon Nanoparticles by Induction Thermal Plasma, 3rd Asia-Pacific Conference on Plasma Physics, 2019.11.
36. Takayuki Watanabe, Manabu Tanaka, Visualization and Diagnostics in Thermal Plasma Processing, The 28th International Toki Conference on Plasma and Fusion Research, 2019.11.
37. Manabu Tanaka, Hiroki Maruyama, Yuta Kugimiya, Tsugio Matsuura, Takayuki Watanabe, Investigation of Temperature Fluctuation of Diode-Rectified Multiphase AC Arc by High-Speed Visualization, 18th Asia-Pacific Confederation of Chemical Engineering, 2019.09.
38. Akio Hashizawa, Manabu Tanaka, Takayuki Watanabe, Tomohiro Koga, Effect of External Magnetic Field on Long DC Arc Characteristics with Ring-Shaped Anode, 18th Asia-Pacific Confederation of Chemical Engineering, 2019.09.
39. Xiaoyu Zhang, Kentaro Yamano, Ririko Hayashida, Hirotaka Sone, Manabu Tanaka, Takayuki Watanabe, Formation Mechanism of amorphous Silicon Nanoparticles Synthesized by Induction Thermal Plasma, 18th Asia-Pacific Confederation of Chemical Engineering, 2019.09.
40. 田中学, 丸山大貴, 釘宮悠太, 渡辺隆行, アーク溶接プロセスにおける熱・物質輸送現象に関する最新の物理的考察, 第247回溶接法研究委員会, 2019.08.
41. Manabu Tanaka, Yuki Saito, Hiroki Maruyama, Takayuki Watanabe, High-Speed Visualization of Metal Oxide Precursor in Multiphase AC Arc during Nanoparticle Formation, 10th International Conference on Reactive Plasmas, 2019.07.
42. Wenjin Chen, Hiroki Munekata, Manabu Tanaka, Takayuki Watanabe, Decomposition of Bisphenol A by Water Thermal Plasma, 10th International Conference on Reactive Plasmas, 2019.07.
43. Manabu Tanaka, Hiroki Maruyama, Taro Hashizume, Tsugio Matsuura, Takayuki Watanabe, Fluctuation Phenomena in Diode-Rectified Multiphase AC Arc for Improvement of Electrode Erosion, 24th International Symposium on Plasma Chemistry, 2019.06.
44. Ririko Hayashida, Kentaro Yamano, Hirotaka Sone, Manabu Tanaka, Takayuki Watanabe, Formation Mechanism of Carbon-Coated Amorphous Si Nanoparticles Synthesized by Induction Thermal Plasmas, 24th International Symposium on Plasma Chemistry, 2019.06.
45. Tadashi Nonaka, Shuhei Yoshida, Kentaro Yamano, Ririko Hayashida, Manabu Tanaka, Takayuki Watanabe, Synthesis of Lithium Oxide Composite with Refractory Metal by Induction Thermal Plasmas, 24th International Symposium on Plasma Chemistry, 2019.06.
46. Libei Liu, Yuta Tanoue, Tadashi Nonaka, Manabu Tanaka, Takayuki Watanabe, Synthesis of Transition Metal Boride Nanoparticles by Induction Thermal Plasma, 24th International Symposium on Plasma Chemistry, 2019.06.
47. Hiroki Munekata, Manabu Tanaka, Takayuki Watanabe, Discharge Characteristics of Water Plasma with Mist Generation, 24th International Symposium on Plasma Chemistry, 2019.06.
48. Hiroki Maruyama, Manabu Tanaka, Takayuki Watanabe, Hisao Nagai, Takeshi Koiwasaki, Takafumi Okuma, High-Speed Visualization of Temperature Fluctuation in Multiphase AC Arc, 24th International Symposium on Plasma Chemistry, 2019.06.
49. Takayuki Watanabe, Masaki Yoshida, Naoki Sakura, Manabu Tanaka, Visualization of Electrode Phenomena in Nitrogen DC Arc, 24th International Symposium on Plasma Chemistry, 2019.06.
50. Manabu Tanaka, Masaki Yoshida, Takayuki Watanabe, Seiichiro Shimizu, and Koji Fujii, Accelerated Erosion Mechanism of Tungsten Cathode of DC Arc in Nitrogen Atmosphere, 第66回応用物理学会春季学術講演会, 2019.03.
51. 田中学,丸山大貴,渡辺隆行,松浦次雄, ダイオード整流型 多相交流アーク の温度変動現象, 化学工学会 第84年会, 2019.03.
52. Hiroki Maruyama, Taro Hashizume, Manabu Tanaka, Takayuki Watanabe, Hisao Nagai, Takeshi Koiwasaki, and Takafumi Okuma, Analysis of Arc Fluctuation Phenomena in Multiphase AC arc by High-Speed Camera, 36th Symposium on Plasma Processing / The 31th Symposium on Plasma Science for Materials, 2019.01.
53. Hiroki Munekata, Manabu Tanaka, and Takayuki Watanabe, Discharge Characteristics of Water Plasma with Mist Generation, 36th Symposium on Plasma Processing / The 31th Symposium on Plasma Science for Materials, 2019.01.
54. Tadashi Nonaka, Shuhei Yoshida, Manabu Tanaka, Takayuki Watanabe, Nanoparticles Synthesis of Lithium Oxide Composite with Refractory Metal by Induction Thermal Plasmas, 36th Symposium on Plasma Processing / The 31th Symposium on Plasma Science for Materials, 2019.01.
55. Manabu Tanaka, Masaki Yoshida, Naoki Sakura, Takayuki Watanabe, Seiichiro Shimizu, and Koji Fujii, Improvement of Erosion Characteristics of Tungsten Based Cathode in Direct Current N2 Arc, 36th Symposium on Plasma Processing / The 31th Symposium on Plasma Science for Materials, 2019.01.
56. 田中学, 吉田匡希, 佐倉直樹, 渡辺隆行, 窒素アークにおけるタングステン陰極の蒸発現象の可視化, 第35回プラズマ・核融合学会年会, 2018.12.
57. Manabu Tanaka, Yuta Kugimiya, Tsugio Matsuura, and Takayuki Watanabe, High-Speed Measurement for Electrode Temperature of Diode-Rectified Multiphase AC Arc, 2nd Asia-Pacific Conference on Plasma Physics, 2018.11.
58. Tadashi Nonaka, Shuhei Yoshida, Hirotaka Sone, Manabu Tanaka, and Takayuki Watanabe, Nanoparticle Synthesis of Lithium Oxide Composite with Refractory Metal for Lithium-Ion Battery Electrodes, 2nd Asia-Pacific Conference on Plasma Physics, 2018.11.
59. Manabu Tanaka, Yuki Saito, Yushi Nawata, and Takayuki Watanabe, High-Speed Visualization of Metal Oxide Precursor in Thermal Plasma Flow during Nanoparticle Formation, 15th International Conference on Fluid Dynamics, 2018.11.
60. Naoki Sakura, Masaki Yoshida, Manabu Tanaka, and Takayuki Watanabe, Visualization of Metal Evaporation from Tungsten-based Cathode in Ar-N2 DC Arc, 15th International Conference on Fluid Dynamics, 2018.11.
61. 田中学, 渡辺隆行, 松浦次雄, パワー半導体を用いた交流アークによる革新的熱プラズマ発生技術, 第34回九州・山口プラズマ研究会, 2018.11.
62. Takayuki Watanabe and Manabu Tanaka, Multiphase AC Arc for Innovative Plasma Processing, Asia-Pacific Conference on Plasma and Terahertz Science, 2018.08.
63. Manabu Tanaka, Hirohiko Soeda, Takayuki Watanabe, Koji Otsuki, Fluctuation Phenomena of Plasma jet in long DC arc System with Ring-Shaped Anode, The 7th International Conference on Microelectronics and Plasma Technology, 2018.07.
64. Hiroki Munekata, Manabu Tanaka, and Takayuki Watanabe, Discharge Characteristics of Water Thermal Plasmas, The 7th International Conference on Microelectronics and Plasma Technology, 2018.07.
65. Masaki Yoshida, Naoki Sakura, Manabu Tanaka, Takayuki Watanabe, Seiichiro Shimizu, and Koji Fujii, High-Speed Visualization of Electrode Phenomena in Nitrogen DC Arc, The 7th International Conference on Microelectronics and Plasma Technology, 2018.07.
66. Takafumi Okuma, Hisao Nagai, Takeshi Koiwasaki, Manabu Tanaka, and Takayuki Watanabe, Investigation of Characteristics of Multiphase AC Arc by High-Speed Visualization, The 7th International Conference on Microelectronics and Plasma Technology, 2018.07.
67. Manabu Tanaka, Tsugio Matsuura, and Takayuki Watanabe, High-Speed Visualization of Temperature Field in Diode-Rectified Multiphase AC Arc with Bipolar Electrodes, 15th High-Tech Plasma Processes, 2018.07.
68. Takayuki Watanabe, Shuhei Yoshida, Tadashi Nonaka, Ririko Hayashida, Takahiro Sone, and Manabu Tanaka, Nanoparticle Synthesis by Thermal Plasmas for Lithium Ion Battery Application, International Conference on Processing & Manufacturing of Advanced Material, 2018.07.
69. Tadashi Nonaka, Shuhei Yoshida, Hirotaka Sone, Manabu Tanaka, Takayuki Watanabe, Control of Crystal structure of Li-Me-Fe Oxide Nanoparticles for Lithium-Ion Battery Electrodes, 5th Japan-Korea Join Symposium on Advanced Solar Cells, 2018.02.
70. Manabu Tanaka, Shuhei Yoshida, Hirotaka Sone, Tadashi Nonaka, Takayuki Watanabe, Thermal Plasma Synthesis of Spinel Li-Mn-Fe Oxide Nanoparticles for Advanced Li-Ion Batteries, Joint Workshop btw SKKU and Kyushu University: Engineering materials and devices, 2018.01.
71. Takayuki Watanabe, Shuhei Yoshida, Tadashi Nonaka, Takahiro Sone, Manabu Tanaka, Oxide Nanoparticle Synthesis by Thermal Plasmas for Lithium Ion Battery Electrode, 4th Annual Symposium of Nonferrous Metallurgy of China, 2017.11.
72. Manabu Tanaka, Hirohiko Soeda, Takayuki Watanabe, and Koji Ohtsuki, Plasma Jet Characteristics in Long DC Arc with Ring-Shaped Anode, The 14th International Conference on Fluid Dynamics, 2017.11.
73. Takafumi Ohkuma, Tomoyuki Imatsuji, Taro Hashizume, Manabu Tanaka, Takayuki Watanabe, Hisao Nagai, Takeshi Koiwasaki, Effects of Working Pressure on Temperature Prifiles in Multi-Phase Ac Arc, The 14th International Conference on Fluid Dynamics, 2017.11.
74. Manabu Tanaka, Tomoyuki Imatsuji, Taro Hashizume, Takayuki Watanabe, Hisao Nagai, Takeshi Koiwasaki, Takafumi Okuma, High-Speed Visualization of Fluctuation Phenomena in Multiphase AC Arc, The 9th JSME-KSME Thermal and Fluids Engineering Conference, 2017.10.
75. Shuhei Yoshida, Takuya Kageyama, Hirotaka Sone, Manabu Tanaka, Takayuki Watanabe, Synthesis of Spinel Type Li-Mn-Fe Oxide Nanoparticles by Induction Thermal Plasmas, The 9th JSME-KSME Thermal and Fluids Engineering Conference, 2017.10.
76. Takayuki Watanabe, Yutaro Ozeki, Manabu Tanaka, Thermal Plasma Characteristics for Environmental Application, 11th Asian-European International Conference on Plasma Surface Science, 2017.09.
77. Takayuki Watanabe, Yutaro Ozeki, Tsuyoshi Matsuo, Manabu Tanaka, Characteristics of Water Thermal Plasma for Biomass Decomposition System, 15th International Conference on Advanced Materials, 2017.08.
78. Taro Hashizume, Manabu Tanaka, Tomoyuki Imatsuji, Yuji Nawata, Takayuki Watanabe, High-Speed Visualization of Erosion Phenomena of Tungsten-Based Electrode in Multiphase AC Arc, 23rd International Symposium on Plasma Chemistry, 2017.08.
79. Hirotaka Sone, Shuhei Yoshida, Takuya Kageyama, Manabu Tanaka, Takayuki Watanabe, Li-Mn-Metal Oxide Nanoparticles Synthesized by Induction Thermal Plasmas for Li-Ion Batteries, 23rd International Symposium on Plasma Chemistry, 2017.08.
80. Manabu Tanaka, Kohki Saga, Taro Hashizume,Tsugio Matsuura, Takayuki Watanabe, Improvement of Electrode Erosion Characteristics in Diode-Rectified Multiphase AC Arc, 23rd International Symposium on Plasma Chemistry, 2017.07, An innovative multiphase AC arc was drastically improved by diode-rectification technique. Conventionally, electrode erosion in AC arc originates from a lack of suitable electrode material because required properties for cathode and anode are different. To solve this problem, separation of AC electrodes into pairs of cathode and anode by diode-rectification was attempted. Diode-rectified MPA was then successfully established and erosion characteristics were drastically improved..
81. Manabu Tanaka, Koki Saga, Taro Hashizume, Takayuki Watanabe, Diode-Rectified Multiphase AC Arc with Bipolar Electrodes for Industrial Applications, The 4th Joint Symposium of Kyushu-Univ.-Shanghai Univ.-Yeungnam Univ. on Chemical Engineering, 2017.06.
82. 田中学, 曽根宏隆, 渡辺隆行, Liイオン電池関連の熱プラズマ技術, 第64回応用物理学会春季学術講演会, 2017.03.
83. 田中 学, 佐賀 弘基, 橋詰 太郎, 松浦 次雄, Takayuki Watanabe, ダイオード整流により二極分割した多相交流アーク電極の消耗現象, 化学工学会第82年会, 2017.03.
84. Manabu Tanaka, Koki Saga, Taro Hashizume, Tsugio Matsuura, and Takayuk Watanabe, High-Speed Camera Observation of Electrode Phenomena in Diode-Rectified Multiphase AC Arc, 34th Sympojium on Plasma Processing, 2017.01.
85. Tanaka Manabu, Yuji Nawata, Tomoyuki Imatsuji, Takayuki Watanabe, Dynamic Behavior of Metal Oxide Vapors in Multiphase AC Arc during Oxide Nanoparticle Fabrication Process, 26th Symposium of The Materials Research Society of Japan, 2016.12.
86. 田中学, 影山拓也, 吉田周平, 渡辺隆行, 高周波熱プラズマによるリチウム遷移金属酸化物ナノ粒子の合成と結晶構造の制御, 第31回九州・山口プラズマ研究会, 2016.11.
87. Takayuki Watanabe, Taro Hashizume, Tomoyuki Imatsuji, Manabu Tanaka, High-Speed Visualization of Thermal Plasma Characteristics, 31st International Congress on High-Speed Imaging and Photonics, 2016.11, Thermal plasmas have attracted extensive attention due to their unique advantages, and it is expected to be utilized for a number of industrial applications. In spite of these experimental efforts for industrial applications, thermal plasma generation and its characteristics remain to be explored. Combination of the two-color pyrometry and the high-speed camera observation is a powerful tool to reveal the electrode phenomena. In this presentation, fundamental researches for electrode phenomena determining thermal plasma characteristics to develop innovative industrial applications of material processing and waste treatment..
88. Manabu Tanaka, Tomoyuki Imatsuji, Yushi Nawata, Taro Hashizume, Takayuki Watanabe, Hisao Nagai, Takeshi Koiwasaki, Takafumi Okuma, Investigation of Temperature Fluctuation in Multiphase AC Arc by High-Speed Camera with Band Pass Filter Optics, 31st International Congress on High-Speed Imaging and Photonics, 2016.11, The objective of the present study is to understand fluctuation phenomena in a multiphase AC arc as a heat source for material processing based on the high-speed visualization of the temperature field in the multiphase AC arc. The multiphase AC arc is one of the thermal plasmas which possess extremely high temperature than 104 K, high chemical reactivity, rapid quenching capability of 103-5 K/s, and flexibility of the reaction atmos-phere in accordance with required chemical reaction. In particular, the multiphase AC arc has strong advantage on higher energy efficiency compared with other thermal plasmas. Therefore, this heat source has been applied to innovative material processing such as in-flight glass melting. However, the temporal and spatial characteris-tics of the multiphase AC arc have not been clarified although these characteristics must be important to deter-mine the characteristics of the products such as particle size distribution, yields of the desired materials. Then, the high-speed visualization of the temperature field of the multiphase AC arc was conducted with 1×104 fps as typical framerate to observe the dynamic behavior of the multiphase AC arc in millisecond time scale. An opti-cal system including the bandpass filters was combined with the high-speed camera to observe particular line emissions from atomic Ar without other emissions from the thermal plasma. The obtained experimental results indicated that the temperature of the multiphase AC arc was around 1.0×104 K. The arc temperature fluctuated in the range from 0.6×104 to 1.4×104 K. Consequently, the arc temperature in the multiphase AC arc is sufficient high to treat the refractory metals and/or ceramics powders..
89. 田中学, 佐賀弘基, 橋詰太郎, 松浦次雄, 渡辺隆行, ダイオード整流を用いた多相交流アークの放電特性, 熱工学コンファレンス2016, 2016.10.
90. Manabu Tanaka, Taiki Kondo, Naoki Sakura, Takayuki Watanabe, Visualization of Metal Vaporization from Tungsten-Based Cathode in Ar-N2 DC Arc, 10th International Conference on Trends in Welding Research, 2016.10, The purpose of the present study is to investigate the erosion mechanism of tungsten-based cathode in a Ar-N2 DC arc at atmospheric pressure. Cathode erosion rates and surface temperatures were measured. In addition, the metal vapor generated from the cathode surface was successfully visualized by a high-speed camera system with appropriate bandpass filters. To understand the effect of N2 addition on the cathode erosion, the N2 concentration in the Ar atmosphere was changed from 0 to 70vol%. The Ar-N2 and Ar-H2 arcs were compared to clarify the effect of N2 addition. Obtained results indicated that the increase of N2 concentration led to drastic increase of the cathode erosion rate, while H2 addition had negligible effect on the cathode erosion. Measured surface temperature at the cathode tip in Ar-N2 arc was about 4150 K, which temperature was higher than that of 3600 K in Ar-H2 arc. This difference can be explained by the different recombination temperatures between N2 and H2. Higher recombination temperature of N2 than the cathode surface temperature led to the cathode heating at cathode surface and/or molten cathode tip. Furthermore, the experimental results from the metal vapor visualization revealed that the tungsten vapor was generated from the periphery of the high temperature cathode spot. These understanding of the electrode phenomena in N2 arc enable to utilize the N2 arc in industrial field..
91. Taro Hashizume, Seiya Nagao, Manabu Tanaka, Takayuki Watanabe, Influence of doped metal oxide on tungsten-based electrode evaporation in multiphase AC arc, 10th International Conference on Trends in Welding Research, 2016.10, Multiphase AC arc has various advantages such as high energy efficiency, large plasma volume and low gas velocity compared with the conventional thermal plasmas. However, electrode erosion is one of the most
important issues to be solved because it determines the electrode lifetime and the purity of the products. Therefore, the purpose of the present study is to investigate the evaporation mechanism from tungsten electrode with doped oxide in the multiphase AC arc. Metal vapor from tungsten and doped oxide was visualized by high-speed camera and appropriate band-pass filter system. Tungsten evaporated just after the evaporation of doped oxide. Therefore, lower boiling point of doped oxide led to quicker evaporation of tungsten during anodic period at AC cycle. These results suggest that evaporation of doped oxide influences the tungsten electrode evaporation. Addition of the vapor from doped oxide into the arc leads to the arc constriction due to its higher electrical conductivity. Therefore, heat flux from the arc to the electrode become larger after the evaporation of doped oxide, resulting in tungsten evaporation..
92. Manabu Tanaka, Tomoyuki Imatsuji, Taro Hashizume, Takayuki Watanabe, Investigation on Temperature Characteristics of Multiphase AC Arc by High-Speed Visualization
, 13th International Conference on Fluid Dynamics, 2016.10, Temperature field and its fluctuation of a multiphase AC arc was successfully visualized by a high-speed camera with appropriate bandpass filters. Effect of ambient pressure on the temperature characteristics of the multiphase AC arc was clarified in the pressure range from 40 to 120 kPa. Results indicated that the higher pressure led to higher temperature with large fluctuation due to its high arc current density..
93. Yutaro Ozeki, Tsuyoshi Matsuo, Manabu Tanaka, Takayuki Watanabe, Characteristics of Water Thermal Plasma for Biomass Utilization System
, 13th International Conference on Fluid Dynamics, 2016.10.
94. 田中学, 佐賀弘基, 橋詰太郎, 今辻智幸, 松浦次雄, 渡辺隆行, ダイオード整流による新規な多相交流アーク発生システムの開発, 化学工学会第48回秋季大会, 2016.09.
95. Manabu Tanaka, Taiki Kondo, Naoki Sakura, Takayuki Watanabe, High-Speed Visualization of Metal Vapor Evaporated from Tungsten-Based Cathode in DC Arc, Gordon Research Conference, 2016.07.
96. Taro Hashizume, Manabu Tanaka, Seiya Nagao, Takayuki Watanabe, Influence of Doped Oxide on Tungsten-Based Electrode Evaporation in Multiphase AC Arc, 14th High-Tech Plasma Processes, 2016.07.
97. Manabu Tanaka, Tsugio Matsuura, Taro Hashizume,Takayuki Watanabe, Diode-Rectified Multiphase AC Arc with Bipolar Electrodes for Degradation of Electrode erosion, 14th High-Tech Plasma Processes, 2016.07.
98. Hirotaka Sone, Takuya Kageyama, Manabu Tanaka, Shuhei Yoshida, Daisuke Okamoto, Takayuki Watanabe, Control of Crystal Structure of Lithium Metal Oxide Nanoparticles by Induction Thermal Plasmas, 13th Asia-Pacific Conference on Plasma Science and Technology, 2016.05.
99. Feng Liang, Manabu Tanaka, Sooseok Choi, Takayuki Watanabe, Comparison of Different Arc-Anode Attachment Modes for Nickel Nanoparticles Production by DC Arc Discharge, 13th Asia-Pacific Conference on Plasma Science and Technology, 2016.05.
100. Tomoyuki Imatsuji, Manabu Tanaka, Yushi Nawata, Taro Hashizume, Takayuki Watanabe, High-Speed Visualization of Temperature Fluctuation of Multi-Phase AC Arc, The 3rd Joint Symposium of Kyushu-Univ.-Shanghai Univ.-Yeungnam Univ. on Chemical Engineering, 2016.01.
101. Taiki Kondo, Naoki Sakura, Manabu Tanaka Takayuki Watanabe, Visualization of Metal Vapor Evaporated from Tungsten-Based Cathode in DC Arc by High-Speed Camera System, The 3rd Joint Symposium of Kyushu-Univ.-Shanghai Univ.-Yeungnam Univ. on Chemical Engineering, 2016.01.
102. Manabu Tanaka, Taro Hashizume, Tomoyuki Imatsuji, Yushi Nawata, Takayuki Watanabe, High-Speed Visualization of Evaporation Phenomena from Tungsten Based Electrode in Multi-Phase AC Arc, 9th International Conference on Reactive Plasmas, 2015.10.
103. Daisuke Okamoto, Takuya Kageyama, Manabu Tanaka, Hirotaka Sone, Takayuki Watanabe, Synthesis of Core-shell Structured Amorphous Si Nanoparticles by Induction Thermal Plasmas, 9th International Conference on Reactive Plasmas, 2015.10.
104. Takuya Kageyama, Daisuke Okamoto, Manabu Tanaka, Hirotaka Sone, Takayuki Watanabe, Synthesis of Lithium Oxide Composite Nanoparticles with Spinel Structure by Induction Thermal Plasma, 9th International Conference on Reactive Plasmas, 2015.10.
105. 田中 学, 今辻 智幸, 縄田 祐志, 橋詰 太郎, 渡邉 隆行, 高速度カメラを用いた多相交流アークの電極蒸発現象の可視化, 化学工学会 第47回秋季大会, 2015.09.
106. 橋詰 太郎, 田中 学, 今辻 智幸, 縄田 祐志, 渡邉 隆行, 電極添加酸化物が多相交流アークにおける液滴飛散現象に与える影響, 化学工学会 第47回秋季大会, 2015.09.
107. Manabu Tanaka, Tomoyuki Imatsuji, Yushi Nawata, Taro Hashizume, Takayuki Watanabe, Fluctuation Phenomena in Multi-Phase AC Arc for Nanoparticles Fabrication, International Symposium on Plasma Chemistry, 2015.07.
108. Taro Hashizume, Manabu Tanaka, Takayuki Watanabe, Droplet Ejection Mechanism from Tungsten Electrode in Multi-Phase AC Arc by High-Speed Visualization, 22nd International Symposium on Plasma Chemistry, 2015.07.
109. Hirotaka Sone, Takuya Kageyama, Manabu Tanaka, Takayuki Watanabe, Investigation on Formation Mechanism of Silicon Composite Nanoparticles in Induction Thermal Plasmas, 7th International Symposium on Advanced Plasma Science and Its Applications for Nitrides and Nanomaterials, 2015.03.
110. Daisuke Okamoto, Takuya Kageyama, Manabu Tanaka, Takayuki Watanabe, Investigation on Formation Mechanism of Amorphous Silcon Nanoparticles in Induction Thermal Plasmas, 7th International Symposium on Advanced Plasma Science and Its Applications for Nitrides and Nanomaterials, 2015.03.
111. 田中 学, 縄田 祐志, 橋詰 太郎, 今辻 智幸, 渡邉 隆行, ナノ粒子合成における多相交流アークの変動現象, 化学工学会 第80年会, 2015.03.
112. 田中 学, 影山 拓也, 岡本 大輔, 曽根 宏隆, 渡邉 隆行, 高周波熱プラズマによるLiMn2O4ナノ粒子の合成, 化学工学会 第80年会, 2015.03.
113. 田中 学, 縄田 祐志, 今辻 智幸, 橋詰 太郎, 渡邉 隆行, 金属ナノ粒子合成における多相交流アークの変動現象, プラズマ・核融合学会 九州・沖縄・山口支部大会, 2014.12.
114. Taro Hashizume, Manabu Tanaka, Takayuki Watanabe, Investigation of Droplet Ejection Mechanism from Electrode in Multi-Phase AC Arc, The International Symposium on Visualization on Jpining & Welding, 2014.11.
115. 田中 学, 程瑩瑩, 岡本 大輔, 崔 秀錫, 渡邉 隆行, 熱プラズマを用いたホウ化チタンナノ粒子合成機構の解明, 化学工学会 第46回秋季大会, 2014.09.
116. Takayuki Watanabe, Taro Hashizume, Manabu Tanaka, Electrode Erosion Mechanism of Multi-Phase AC Arc, 21st Asia-Pacific Conference on Plasma Sciencen and Technology, 2014.09.
117. Takayuki Watanabe, Taro Hashizume, Manabu Tanaka, Electrode Phenomena of Multi-Phase AC Arc, Gordon Research Conference, 2014.07.
118. Manabu Tanaka, Takayuki Watanabe, High-Speed Visualization of Electrode Phenomena in Thermal Plasma Processing, 5th International Conference on Microelectronics and Plasma Technology, 2014.07, A multi-phase AC arc has been developed to apply to innovative in-flight glass melting technology as a promising heat source because it possesses following advantages; the high energy efficiency, the large plasma volume, the low gas velocity, and so on. However, the understanding of multi-phase AC arc still remains to be improved for the practical use. In particular, electrode erosion is one of the most important issues to be solved. The purpose of this study is to investigate the electrode erosion mechanism of the multi-phase arc.
Multi-phase AC arc reactor mainly consisted of 12 electrodes, arc chamber, and AC power supply. The electrodes were made of tungsten (98 wt%) and thoria (2 wt%) with diameter of 6 mm. Argon shield gas was injected around the electrode to prevent them from the oxidation because the melting point of tungsten oxide is lower than that of metal tungsten. As the multi-phase arc discharge was generated under the atmospheric air except of the above mentioned argon, the plasma source gas was mainly air. The argon gas flow rate was changed to investigate the shield gas effect on the electrode erosion.
Combination of the high-speed camera and the band-pass filters system enables to measure the electrode temperature even during arc discharge, and to observe dynamic behavior of the vapors in the arc. In the present work, two synchronized high-speed cameras were applied to investigate the erosion mechanism. One of the systems was used to measure the electrode temperature, while another one was synchronized to observe the vapors in the arc.
The strong tungsten emission separated from the other emissions was successfully observed at the anodic period in the case of lower argon gas flow rate. Moreover, the synchronized temperature measurements revealed that the electrode tip temperature increased with decreasing the argon gas flow rate. This is because the discharge point was stabilized due to the constriction of arc in anodic period at the lower flow rate of shield gas. The droplet ejection from the molten electrode surface was also observed in the case of lower shield gas flow rate. The droplet ejection was contributed to the high electrode erosion of the multi-phase arc.
The high-speed visualization by the synchronized system of high-speed video cameras with appropriate band-pass filters is important to understand electrode phenomena during thermal plasma processing..
119. Manabu Tanaka, Jun Noda, Takayuki Watanabe, Junya Matsuno, Akira Tsuchiyama, Formation Mechanism of Metal Embedded Nanoparticles Coated by Amorphous Silicate in Induction Thermal Plasmas, 8th International Conference on Reactive Plasmas, 2014.02.
120. Takayuki Watanabe, Manabu Tanaka, Tomoki Ikeba, Yaping Liu, Sooseok Choi, Electrode Temperature Measurement during Plasma Processing to Investigate Electrode Phenomena, 21st International Symposium on Plasma Chemistry, 2013.08.
121. Manabu Tanaka, Tomoki Ikeba, Yaping Liu, Sooseok Choi, Takayuki Watanabe, Investigation on Electrode Erosion Mechanism of Multi-Phase AC Arc by High-Speed Camera Observation, 21st International Symposium on Plasma Chemistry, 2013.08.
122. Yaping Liu, Manabu Tanaka, Tomoki Ikeba, Sooseok Choi, Takayuki Watanabe, Investigation of Spatial Characteristics of Multi-Phase AC Arc, 21st International Symposium on Plasma Chemistry, 2013.08.
123. Feng Liang, Manabu Tanaka, Sooseok Choi, Takayuki Watanabe, Electrode Temperature Measurement for Carbon Nanomaterial Production in Arc Discharge Method, 21st International Symposium on Plasma Chemistry, 2013.08.
124. Manabu Tanaka, Tomoki Ikeba, Yaping Liu, Sooseok Choi, Takayuki Watanabe, Investigation of Erosion Mechanism of Multi-Phase AC Arc by High-Speed Video Camera, 11th Asian-Pacific Conference on Plasma Science & Technology, 2012.10.
125. Yaping Liu, Manabu Tanaka, Tomoki Ikeba, Sooseok Choi, Takayuki Watanabe, Investigation of Discharge Uniformity of Multi-Phase AC Arc and Its Effect on the Temperature of In-Flight Glass Particles, 11th Asian-Pacific Conference on Plasma Science & Technology, 2012.10.
126. Feng Liang, Manabu Tanaka, Sooseok Choi, Takayuki Watanabe, Investigation of Formation Mechanism of Carbon Materials by Comparing Cathode Deposit with Anode Deposit in Arc Discharge Method, 11th Asian-Pacific Conference on Plasma Science & Technology, 2012.10.
127. Takayuki Watanabe, Manabu Tanaka, Tasuku Shimizu, Feng Liang, Anode Jet Characteristics of Argon-Hydrogen Arc for Nanoparticle Production, 9th International Conference on Flow Dynamics, 2012.09.
128. Manabu Tanaka, Tomoki Ikeba, Yaping Liu, Sooseok Choi, Takayuki Watanabe, Electrode Temperature Estimation of Multi-Phase AC Arc by High-Speed Video Camera, 9th International Conference on Flow Dynamics, 2012.09.
129. Manabu Tanaka, Tomoki Ikeba, Yaping Liu, Tsugio Matsuura, Takayuki Watanabe, Electrode Temperature Measurements of Multi-Phase AC Arc by High-Speed Video Camera, 12th European Plasma Conference (high-tech plasma processes), 2012.06.
130. Yaping Liu, Manabu Tanaka, Tomoki Ikeba, Tsugio Matsuura, Takayuki Watanabe, In-flight particle measurement of glass raw materials in hybrid heating of twelve-phase AC arc with oxygen burner, 12th European Plasma Conference (high-tech plasma processes), 2012.06.
131. Yaping Liu, Manabu Tanaka, Tomoki Ikeba, Sooseok Choi, Takayuki Watanabe, In-Flight Particle Measurement of Glass Materials in Thermal Plasmas, 4th International Symposium on Advanced Science and Its Applications for Nitrides and Nanomaterials, 2012.03.
132. Tsugio Matsuura, Manabu Tanaka, Yosuke Tsuruoka, Takayuki Watanabe, Discharge Mechanism of Multi-Phase AC Arc for In-Flight Glass Melting, 3rd International Congress on Ceramics, 2011.11.
133. Manabu Tanaka, Yosuke Tsuruoka, Yaping Liu, Takayuki Watanabe, Jun Taguchi, Tetsuji Yano, Investigation of In-Flight Melting Behavior of Granulated Glass Raw Material by Multi-Phase AC Arc Plasma, 3rd International Congress on Ceramics, 2011.11.
134. Takayuki Watanabe, Manabu Tanaka, Tsugio Matsuura, Thermal Plasma Generation for In-Flight Glass Melting, 3rd International Congress on Ceramics, 2011.11.
135. Tsugio Matsuura, Manabu Tanaka, Yaping Liu, Yosuke Tsuruoka, Takayuki Watanabe, Discharge Phenomena of Multi-Phase AC Arc for In-Flight Processing, 20th International Symposium on Plasma Chemistry, 2011.07.
136. Manabu Tanaka, Yaping Liu, Yosuke Tsuruoka, Takayuki Watanabe, Investigation of In-Flight Melting Behavior of Granulated Glass Raw Materials by Hybrid Heating of Twelve-Phase AC Arc with Oxygen Burner, 20th International Symposium on Plasma Chemistry, 2011.07.
137. Yaping Liu, Manabu Tanaka, Yosuke Tsuruoka, Takayuki Watanabe, In-Flight Particle Measurement of Glass Raw Materials in Multi-Phase AC Arc Plasma, 20th International Symposium on Plasma Chemistry, 2011.07.
138. Manabu Tanaka, Yaping Liu, Yosuke Tsuruoka, Tsugio Matsuura, Takayuki Watanabe, In-Flight Melting of Alkaline Free Glass by Combination of Multi-Phase AC Arc with Oxygen Burner, The 9th International Conference on Advances in the Fusion and Processing of Glass, 2011.07.
139. Takayuki Watanabe, Manabu Tanaka, Narengerile, Environmental Friendly Thermal Plasma Processing for Waste Treatment and Material Synthesis, The 3rd International Conference on Microelectronics and Plasma Technology, 2011.07.
140. Yaping Liu, Manabu Tanaka, Yosuke Tsuruoka, Takayuki Watanabe, In-Flight Behavior of Granular Alkali-Free Glass by Multi-Phase AC Arc and Hybrid Plasma, The 4th International Conference on Plasma-Nano Technology & Science, 2011.03.
141. Yaping Liu, Yosuke Tsuruoka, Manabu Tanaka, Toshio Ichihashi, Tetsuji Yano, Takayuki Watanabe, In-flight Melting Behavior of Different Glass Raw Materials by Hybrid Heating of Twelve-Phase AC Arc with Oxygen Burner, 10th Asia-Pacific Conference on Plasma Science and Technology, 2010.07.
142. Yosuke Tsuruoka, Manabu Tanaka, Toshio Ichihashi, Tsugio Matasuura, Takayuki Watanabe, Stability Analysis of Multi-Phase AC Arc Discharge for In-Flight Glass Melting, 10th Asia-Pacific Conference on Plasma Science and Technology, 2010.07.
143. Manabu Tanaka, Takayuki Watanabe, Metal Hydride Formation from Molten Metal Surface by Ar-H2 Arc, 10th Asia-Pacific Conference on Plasma Science and Technology, 2010.07.
144. Takayuki Watanabe, Manabu Tanaka, Thermal Plasma Processing for Functional Nanoparticle Synthesis, ASEAN Regional Symposium on Chemical Engineering, 2009.12.
145. Manabu Tanaka, Joachim. V. R. Heberlein, Takayuki Watanabe, Initiation of the anode material evaporation in a transferred arc device, International Symposium on Plasma Chemistry, 2009.07.

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