研究実績
発表論文
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C. Zhuang, W. Jin, J. Xiao, X. Lu, O. Takeda, H. Zhu: Deposition and Morphology Control of Carbon Film through Electrochemical Reduction of Carbonate Ions in Molten LiCl, Journal of The Electrochemical Society, 2023, 170, 102503.
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O.Takeda, T.H. Okabe: Chapter 15 Resource and production technologies for scandium, Routledge Handbook of the Extractive Industries and Sustainable Development, ed. by Natalia Yakovleva and Edmund Nickless, Routeledge, Oxon, UK (2022.5.30), 297-310. DOI: 10.4324/9781003001317-18[共著]
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X.Lu, H.Ohno, O.Takeda, T.Miki, H.Zhu, Y.Sasaki, T.Nagasaka: Thermodynamic evaluation on the recyclability of stainless steel by considering accompanying elements distribution during remelting process, Journal of Industrial Ecology, 2022,1-13, First published: 02 August 2022.
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X.Lu, H.Ohno, O.Takeda, T.Miki, Y.Sasaki, H.Zhu, T.Nagasaka, Toward an efficient recycling system: Evaluating recyclability of end‐of‐life stainless steels by considering elements distribution during a remelting process, Journal of Industrial Ecology, (2022), 1–13.
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X.Lu, Z.Zhang, T.Hiraki, O.Takeda, H.Zhu, K.Matsubae, T.Nagasaka, A solid-state electrolysis process for upcycling aluminium scrap. Nature, 606 (2022), 511-515.
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D.Noguchi, O.Takeda, T.Abe, H.Zhu, S.Sugimoto, Determination of activity of RE (RE = Nd and Dy) in molten RE-Fe-B alloys by the electromotive force method, Thermochimica Acta, 709 (2022), 179161.
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O.Takeda, K.Shimizu, H.Zhu, S.Sugimoto, Phase equilibria of Sm-Fe-Ti-M (M = Cu, Ag) systems and wetting behavior of M-Sm alloys on SmFe11Ti substrate, Journal of Magnetism and Magnetic Materials, 542(2022), 168620.
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O. Takeda, Reclamation of In-Process Neodymium Magnet Waste using High Temperature Chemical Process, Journal of Japanese Society of Electrochemistry, Vol. 89, No. 1 (2021), 16-20.
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O.Takeda, T.H.Okabe, Current Status of Scandium Resources and Production Technology, J. MMIJ, Vol. 137, No. 3 (2021), 36-44.
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H.Zhu, O.Takeda, X.Lu, 肖九三, Cost of Titanium Metal Smelting and Potential for New Smelting Processes, Titanium, Vol. 69, No. 3 (2021), 221-227.
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O.Takeda, T.H.Okabe, Current Status of Scandium Resource Development and Production Technology Development, Journal of Japanese Society of Metal, Vol. 91, No. 12 (2021), 1014-1020.
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Z.Hongmin, X.Jiusan, J.Shuqiang, L.Xin, Production costs of titanium smelting and the possibility of a new titanium metallurgical process, Steel Vanadium and Titanium, . 42(2021) (3), 10-16.pment, Journal of Japanese Society of Metal, Vol. 91, No. 12 (2021), 1014-1020.
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X.Lu, O.Takeda, H.Zhu, New Production Method for Titanium Fine Powder Using Shuttle of Disproportionation and Equalization Reactions of Titanium Ions in Molten Salts, Titanium, January 2021, 69 (1), 53-59
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A.Saengdeejing, Y.Chen, O.Takeda, M.Enoki, S.Sugimito, H.Ohtani, A.Taichi, “Sm-Ti binary thermodynamic database and phase diagram”, Calphad, Vol. 75 (2021), 102357.
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D.Noguchi, O.Takeda, H.Zhu, S.Sugimoto, Surface tension measurement of Nd - Fe - B - X melts (X = O, Cu, Ga, In) as simulated substances of Nd-rich phase in Nd magnet, Journal of Magnetism and Magnetic Materials, 539 (2021), 168407.
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T.H. Okabe, O. Takeda, T.Ouchi, Titanium Upgrade Recycling, Journal of Japanese Society of Metal, Vol. 90, No. 3 (2020), 166-172.0
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O. Takeda, Surface Modification of Heat-Resistant Materials by Electrolytic Reduction Diffusion Method, Journal of Japanese Society of Molten Salt and High Temperature Chemistry, Vol. 63, No. 2 (2020), 70-77.
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K. Yasuda, T. Ohkubo, O. Takeda, S. Natsui, H. Sekimoto, Activity Report on Information-Gathering of Database Literatures for Molten Salts, Electrochemistry, Vol. 88, No. 4 (2020), 243–252.
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O. Takeda, T. Ouchi, and T.H. Okabe, Recent Progress in Titanium Extraction and Recycling, Metall. Mater. Trans. B, Vol. 51B, August (2020), 1315-1328. DOI: 10.1007/s11663-020-01898-6.
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X.Lu, O.Takeda, H.Zhu, New Production Process for Titanium-Based Fine Powder using Shuttle of Disproportionation and Homogenization Reactions of Titanium Ions in Molten Salt, Journal of The Japan Institute of Light Metals, 2020, 70 (7), 28-29.
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O.Takeda, M.Yamada, M.Kawasaki, M.Yamamoto, S.Sakurai, X. Lu, H.Zhu, Development of wide-range viscometer and the viscosity measurement for SiO2-Na2O-NaF system, ISIJ International, 60 (2020) (3), 590-596.
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O. Takeda, T.H. Okabe: Current Status of Titanium Recycling and Related Technologies, JOM, Vol. 71, Issue 6 (2019). 1981–1990. DOI: 10.1007/s11837-018-3278-1
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O.Takeda, T.H. Okabe, Development of Processes for Recycling Rare Earths from Rare Earth Magnets, Chemical Industry, Vol. 70, No. 7 (2019), 490-494.
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O.Takeda, X.Lu, H.Zhu, Development of Wide Viscosity Range Measurement Technology for High Temperature Melts, Materia Japan, Vol. 58, No. 11 (2019), 630-633.
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X. Lu, T.Ono, O.Takeda, H.Zhu, Production of Fine Titanium Powder from Titanium Sponge by the Shuttle of the Disproportionation Reaction in Molten NaCl-KCl, Materials Transaction, 60(2019)(3), 405-410.
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X.Lu, T.Miki, T.Hiraki, H.Zhu, T.Nagasaka, Thermodynamics of Elements in Dilute Silicon Melts, JOM 71 (2019) (4), 1456-1470.
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X.Lu, T.Miki, O.Takeda, H.Zhu, T.Nagasaka, Thermodynamic criteria of the end-of-life silicon wafers refining for closing the recycling loop of photovoltaic panels, Science and technology of advanced materials, 20 (2019) (1), 813-825.
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O. Takeda, T.H. Okabe, Rare Earths Supply Status and Issues, Journal of The Japan Institute of Industrial Materials, Vol. 66, No. 8 (2018), 58-63.
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T.H. Okabe, O. Takeda, Titanium Recycling, Journal of The Japan Institute of Light Metals, Vol. 68, No. 11 (2018), 636-644.
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O. Takeda, X. Lu, T. Miki, K. Nakajima, Thermodynamic evaluation of elemental distribution in a ferronickel electric furnace for the prospect of recycling pathway of nickel, Resources, Conservaration and Recycling, 133 (2018), 362-368.
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O.Takeda, K.Suda, X.Lu, H.Zhu, Zirconium Metal Production by Electrorefining of Zr Oxycarbide, Journal of Sustainable Metallurgy, 4(2018)(4), 506-515.
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O. Takeda, Viscosity of Molten Metals, Molten Salts, and Molten Slags, Materia Japan, Vol. 56, No. 2 (2017), 55-61.
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O. Takeda, T.H. Okabe, Titanium Smelting and Refining, Journal of The Japan Institute of Light Metals,Vol. 67, No. 6 (2017), 257-263.
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T.H.Okabe, O. Takeda, Titanium Recycling, Journal of Japanese Society of Metal, Vol. 87, No. 9 (2017), 752-758.
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O. Takeda, T.H.Okabe, Development Trends in Rare Earth Metal Recycling Technology, Journal of Japanese Society of Metal, Vol. 87, No. 9 (2017), 759-764.
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O.Takeda, S.Yamanaka, M.Hoshi, H.Zhu, Y.Sato, Electrochemical Formation of MoSi2 Film on Ni-Based Superalloy, Journal of the Electrochemical Society , 164 (2017) (14), D978-D984.
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O.Takeda, S.Yamanaka, M.Hoshi, H.Zhu, Y.Sato, Electrochemical Siliciding of Nickel and Molybdenum in Molten Fluoride, Journal of the Electrochemical Society, 164 (2017) (7), D517-D523.
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Os.Takeda, H.Iwamoto, R.Sakashita, C.Iseki, H.Zhu, Development of Maximum Bubble Pressure Method for Surface Tension Measurement of High Viscosity Molten Silicate, International Journal of Thermophysics, 38(2017), 1-14.
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K.Nakajima, O.Takeda, T.Miki, K.Matsubae, T.Nagasaka, Recycling and Dissipation of Metals: Distribution of Elements in the Metal, Slag, and Gas Phases During Metallurgical Processing, Metal Sustainability: Global Challenges, Consequences, and Prospects, ed. by Reed M. Izatt, Wiley, (2016.8), 453-466.[共著]
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K. Nakajima, I. Daigo, K. Okada, S. Koike, K. Nansai, K. Matsubae, O. Takeda, T. Miki, Bottlenecks in material cycle of nickel, Mat´eriaux & Techniques, 104 (2016), 604 (7 pages).
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O. Takeda, N. Ouchi, Y. Sato, Viscosity of Molten Fe-B Alloy, ISIJ Int., Vol. 55, No. 3 (2015), 500-503.
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O. Takeda, Y. Hoshino, Y. Anbo, K. Yanagase, M. Aono, Y. Sato, Viscosity of Molten Alkaline-earth Fluorides, Int. J. Thermophys., Vol. 36, No. 4 (2015), 648-657.
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O. Takeda, K. Yanagase, Y. Anbo, M. Aono, Y. Hoshino, Y. Sato, Density Measurement of Molten Alkaline-Earth Fluorides Using Archimedean Dual Sinker Method, Int. J. Thermophys, 36 (2015), 2674–2686.
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J. Hou, H. Cheng, C. Yang, O. Takeda, H. Zhu, Hierarchical Carbon Quantum Dots / Hydrogenated-γ-TaON Heterojunctions for Broadspectrum Photocatalytic Performance, Nano Energy, 18 (2015), 143-153.
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J.Hou, C.Yang, H.Cheng, O.Takeda, H.Zhu, Three-Dimensional Bimetal-Graphene-Semiconductor Coaxial Nanowire Arrays to Harness Charge Flow for the Photochemical Reduction of Carbon Dioxide, Angewandte Chemie - International Edition, 54(2015) , 8480-8484.
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O.Takeda, K.Takagi, T.Handa, K.Katagiri, H.Zhu, Y.Sato, Production of aluminum nitride from aluminum metal using molten fluoride, Journal of Materials Research, 30 (2015), 635-644.
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H.Cheng, J.Hou, O.Takeda, X.Guo, H.Zhu, A unique Z-scheme 2D/2D nanosheet heterojunction design to harness charge transfer for photocatalysis, Journal of Materials Chemistry A, 3 (2015), 11006-11013.
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J.Hou, H.Cheng, O.Takeda, H.Zhu, Unique 3D heterojunction photoanode design to harness charge transfer for efficient and stable photoelectrochemical water splitting, Energy & Environmental Science, 8 (2015), 1348-1357.
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O. Takeda, T. Uda, T.H.Okabe: 2. Non-ferrous Process Principles and Production technologies, Chapter 2.2 Rare Earth, Titanium Group Metals, and Reactive Metal Production, Ttreatise on Process Metallurgy Vol. 3, ed. by Seshadri Seetharaman, Elsevier Inc., Oxford, UK, (2014.1), 995-1069.[共著]
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Y. Sato, O. Takeda, M. Li, M. Hoshi, Elecrochmistry of Anodic Reaction in Molten Salt Containig LiOH for Lithium-Hydrogen Energy Cycle, Molten Salts Chemistry and Technology, ed. by Marcelle Gaune-Escard and Meir Martin Haarberg, John Wiley & Sons, Ltd., West Sussex, UK (2014), 563-567. (MS9) [共著]
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O. Takeda, T. H.Okabe, M. Okamoto, S.Shiroyama, Y. Umetsu, Development of Green Recycling Technology for Rare Earth, Fine chemical,Vol. 43, No. 4, (2014), pp. 37-42.
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O. Takeda, T.H. Okabe: Current Status on Resource and Recycling Technology for Rare Earths, Metall. Mater. Trans. E, Vol. 1A, June (2014), 160-173.
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O. Takeda, Refining-type Recycling Process for Neodymium Magnets using Molten Fluoride, Journal of Japanese Society of Molten Salt and High Temperature Chemistry, Vol. 57, No. 3 (2014), pp. 114-121.
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汪秋雨,江波,焦树强,O. Takeda, H.Zhu, Titanium Smelting by Oxycarbide Electrolysis, Journal of Japanese Society of Molten Salt and High Temperature Chemistry, 57 (2014), 12-15.
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O. Takeda, K. Nakano, Y. Sato, Recycling of Rare Earth Magnet Waste by Removing Rare Earth Oxide with Molten Fluoride, Mater. Trans., Vol. 55, No. 2 (2014), 334-341.
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Y. Yokka, M. Kimura, T. Handa, K. Sasaki, O. Takeda, T. Yamamura, Y. Sato, Decomposition Process for Polychlorobiphenyls by Means of Basic Molten Salts, Tetsu-to-Hagane, Vol. 100, No. 6 (2014), 809-815.
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O. Takeda, T. Onishi, Y.Sato, Viscosity Measurement of SiO2-Na2O Melts with Addition of NaF, ISIJ Int., Vol. 54, No. 9 (2014), 2045-2049.
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O. Takeda, M. Li, T. Toma, K. Sugiyama, M. Hoshi, Y. Sato, Electrowinning of Lithium from LiOH in Molten Chloride, J. Electrochem. Soc., 161 (14) (2014), D820-D823.
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J. Hou, C. Yang, S. Jiao, O. Takeda, H. Zhu, High-Performance p-Cu2O/n-TaON Heterojunction Nanorod Photoanodes Passivated with an Ultrathin Carbon Sheath for Photoelectrochemical Water Splitting, Energy & Environmental Science, 7 (2014), 3758-3768.
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K. Nakajima, H. Ohno, Y. Kondo, K. Matsubae, O. Takeda, T. Miki, S. Nakamura, T. Nagasaka, Simultaneous MFA of Nickel, Chromium and Molybdenum Used in Alloy Steel by means of Input-output analysis, Environ. Sci. Technol., 47 (2013), 4653−4660.
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O. Takeda, K. Nakajima, T. Miki, Thermodynamic Approach for Effective Utilization of Metal Resources - Distribution of Elements in Dry Smelting Processes of Steel, Copper and Lead - , Journal of Japanese Society of Metal, Vol. 82, No. 7(2012), pp. 616-619.
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O. Takeda, T.H. Okabe, Pyrometallurgy and Recycling of Rare Earth Metals, Journal of Society of Automotive Engineers of Japan, Vol. 66, No. 11 (2012), pp. 68-73
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Y. Yamauchi, O. Takeda, M. Hoshi, T. Yamamura, Y. Sato, Decomposition of Carbon Tetrachloride and Mono-chlorobenzen by using Basic Molten Salts, Electrochemistry, 80 (2012), 974-979.
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O. Takeda, D. Aoki, Y. Yokka, T. Yamamura, Y. Sato, Decomposition of Mono-, di- and tri-chlorobenzene by using Basic Molten Salts, ISIJ Int., 52 (2012), 1705–1711.
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Y. Yokka, M. Kimura, T. Handa, K. Sasaki, O. Takeda, T. Yamamura, Y. Sato, Decomposition Process for Polychlorobiphenyls by means of Basic Molten Salts, ISIJ Int., 52 (2012), 1914–1920.
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O. Takeda, T. Okawara, Y. Sato, Development of a New Viscometer Based on Rotating Crucible Method and Viscosity Measurement of SiO2-CaO-CaF2 System, ISIJ Int., 52 (2012), 1544–1549.
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X. Lu, T. Hiraki, K. Nakajima, O. Takeda, K. Matsuabe, Hongmin Zhu, S. Nakamura, T. Nagasaka. Thermodynamic analysis of separation of alloying elements in recycling of end-of-life titanium products, Separation and Purification Technology, 89(2012), 135-141.
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O.Takeda, T.H.Okabe, Rare Earth Smelting and Recycling Technology, Journal of Japanese Society of Tribologists, 56(8) (2011), 466-471.
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O. Takeda, T.H. Okabe, Rare Metal Facts and Technology Development, Chemistry & Chemical Industry, 64(10) (2011), 774-776.
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K. Nakajima, O. Takeda, T. Miki, K. Matsubae, T. Nagasaka, Thermodynamic Analysis for the Controllability of Elements in the Recycling Process of Metals, Environ. Sci. Technol., 45 (2011), 4929-4936
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T. Hiraki, O. Takeda, K. Nakajima, T. Miki, K. Matsubae, S. Nakamura, T. Nagasaka, Thermodynamic Criteria for the Removal of Impurities from End-of-Life Magnesium Alloys by Evaporation and Flux Treatment. Science and Technology of Advanced Materials, 12 (2011), 035003 (10pp).
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K. Nakajima, O. Takeda, T. Miki, K. Matsubae, S. Nakamura, T. Nagasaka, Thermodynamic Analysis of Contamination by Alloying Elements in Aluminum Recycling. Environ. Sci. Technol., 44 (2010), 5594–5600.
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O. Takeda, M. Li, M. Hoshi, Y. Sato, Electrowinning of Lithium from Molten Salt Containing LiOH for Hydrogen Storage and Transportation. ECS Trans., 33 (2010), 455-462.
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K. Onodera, Y. Hoshino, O. Takeda, Y. Sato, Production of Tantalum Fine Powder by Reducting Tantalum Chloride with Zinc in Molten Salt. ECS Trans., 33 (2010), 231-237.
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O.Takeda, K.Nakano, Y.Sato, Recycling of Rare Earth Magnet Waste Using Fluoride Molten Salts, Journal of Japanese Society of Molten Salt and High Temperature Chemistry, 52(2) (2009), 63-70.
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O. Takeda, Development of New Smelting Process for Titanium, MAteria Japan, 48(9) (2009), 471-474.
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K. Nakajima, O. Takeda, T. Miki, T. Nagasaka, Evaluation Method of Metal Resource Recyclability based on Thermodynamic Analysis. Materials Transactions, 50 (2009), 453-460.
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K.Nakajima, O.Takeda, T.Miki , T.Nagasaka, Evaluation Method of Metal Resource Recoverability of Based on Thermodynamic Analysis, J. Japan Inst. Metals, 73 (2009), 794-801.
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O. Takeda, T. Ideno, E. Nakamura, Y. Sato, Electrochemical Production of Sm–Co Thin Film in Molten LiCl-KCl System. ECS Trans., 16 (2009), 431-439.
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Y. Hoshino, O. Takeda, M. Hoshi, Y. Sato, Production of Tantalum Fine Powder by Reduction of Tantalum Chloride with Zinc. ECS Trans., 16 (2009), 247-253.
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T.Yamamura, T. Matsui, M. Yamasaki, H.Zhu, M. Endo, Y.Sato, T.Yamamura, S. Yoda, T.Masaki, Measurement of Impurity Diffusion Coefficients in Ionic Melts with High Accuracy under Microgravity. J. Jpn. Soc. Microgravity Appl., 16 (1999), 104 – 110.
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Y.Sato, T. Yamasaki, H.Kato, H.Zhu, M.Hoshi, T.Yamamura, Viscosities of Li2CO3 – Na2CO3 and Li2CO3 – K2CO3 Binary Melts Measurement of Molten Fe Base Si Alloy. Jpn. J. Thermophys. Properties, 13(1999), 162-167.
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H.Zhu, Y.Shibata, Y.Sato, T.Yamamura. Ultrasonic spectroscopy of high temperature melts. Ultrasonic TECHNO, 8(1996), 17-20
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H.Zhu, Y.Sato, T.Yamamura, Ultrasonic Absorption Coefficient in NaNO3-MNO3(M=Li, K, Rb and Cs) Binary Melts. Jpn. J. Thermophys. Properties, 10(1996), 109-114.
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H.Zhu, Y.Shibata, Y.Sato, T.Yamamura. Density and Ultrasonic Velocity of NaNO3-MNO3 (M=Li, K, Rb and Cs) Binary Melts. Jpn. J. Thermophys. Properties, 10(1996), 102-108.
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H.Zhu, K.Iwabuchi, Y.Sato, T.Yamamura, Brillouin Spectra and Structural Relaxation in ZnCl2-KCl Binary Melts. Jpn. J. Appl. Phys., 33(1994), 3220-3225.
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H.Zhu, Y.Sato, T.Yamamura, Rayleigh-Brillouin Scattering of ZnCl2-MCl (M: Na, K and Cs) Binary Melts, The Electrochemical Society, 1994-13(1994), 300-307.
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T.Yamamura, Y.Sato, H.Zhu, M.Endo, Viscoelastic Properties of Molten ZnCl2-MCl (M: Na, K) Binary Systems. ISIJ International, 33(1993), 176-181.
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H.Zhu, T.Saito, Y.Sato, T.Yamamura, K.Shimakage, T.Ejima, Ultrasonic Velocity and Absorption Coefficient In Molten Alkali Metal Nitrates And Carbonates. Journal of Japan Institute of Metals, 55(9) (1991), 937 – 944.