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List of English Regular Papers

  1. 'Preparation of TiAl and Ti3Al powders by Calciothermic Reduction of Oxides',
    R. O. Suzuki, M. Ikezawa, T. H. Okabe, T. Oishi, and K. Ono:
    Mater. Trans. JIM, vol.31, no.1 (1990) pp.61-68.
  2. 'A Fundamental Study on Preparation of Al3Ti Powders by Calciothermic Reduction of Oxides',
    R. O. Suzuki, T. Ueki, M. Ikezawa, T. H. Okabe, T. Oishi, and K. Ono:
    Mater. Trans. JIM, vol.32, no.3 (1991) pp.272-277.
  3. 'Thermodynamic Properties of Dilute Titanium-Oxygen Solid Solution in Beta Phase',
    T. H. Okabe, R. O. Suzuki, T. Oishi, and K. Ono:
    Mater. Trans. JIM, vol.32, no.5 (1991) pp.485-488.
  4. 'Preparation and Characterization of Extra-Low-Oxygen Titanium',
    T. H. Okabe, T. Oishi, and K. Ono:
    J. Alloy. Compounds., vol.184 (1992) pp.43-56.
  5. 'A Fundamental Study on the Preparation of Niobium Aluminide Powders by Calciothermic Reduction',
    T. H. Okabe, K. Fujiwara, T. Oishi, and K. Ono:
    Met. Trans. B, vol.23B, August (1992) pp.415-421.
  6. 'Deoxidation of Titanium Aluminide by Ca-Al Alloy under Controlled Aluminum Activity',
    T. H. Okabe, T. Oishi, and K. Ono:
    Met. Trans. B, vol.23B (1992) pp.583-590.
  7. 'Electrochemical Deoxidation of Titanium',
    T. H. Okabe, M. Nakamura, T. Oishi, and K. Ono:
    Met. Trans. B, vol.24B, June (1993) pp.449-455.
  8. 'Electrochemical Deoxidation of Yttrium-Oxygen Solid Solutions',
    T. H. Okabe, T. Deura, T. Oishi, K. Ono, and D. R. Sadoway:
    J. Alloy and Compounds, vol.237 (1996) pp.150-154.
  9. 'Thermodynamic Properties of Oxygen in Yttrium-Oxygen Solid Solutions',
    T. H. Okabe, T. Deura, T. Oishi, K. Ono, and D. R. Sadoway:
    Met. Trans. B, vol.27B, October (1996) pp.841-847.
  10. 'Thermodynamic Properties of Oxygen in RE-O (RE=Gd, Tb, Dy, Er) Solid Solutions',
    T. H. Okabe, K. Hirota, E. Kasai, F. Saito, Y. Waseda, and K. T. Jacob:
    J. Alloys and Compounds, vol.279 (1998) pp.184-191.
  11. 'Tantalum Powder Production by Magnesiothermic Reduction of TaCl5 Through an Electronically Mediated Reaction (EMR)',
    Park Il, T. H. Okabe, and Y. Waseda:
    J. Alloys and Compounds, vol.280, no.1-2 (1998) pp.265-272.
  12. 'Thermodynamic Properties of Oxygen in Ln-O (Ln=La, Pr, Nd) Solid Solutions and Their Deoxidation by Molten Salt Electrolysis',
    T. H. Okabe, K. Hirota, Y. Waseda, and K. T. Jacob:
    J. Mining and Materials Processing Institute of Japan, vol.114, no.11 (1998) pp.813-818.
  13. 'Metallothermic Reduction as an Electronically Mediated Reaction',
    T. H. Okabe and D. R. Sadoway:
    J. Materials Research, vol.12, no.13 (1998) pp.3372-3377.
  14. 'Electrochemical Deoxidation of RE-O (RE=Gd, Tb, Dy, Er) Solid Solution',
    K. Hirota, T. H. Okabe, F. Saito, Y. Waseda, and K. T. Jacob:
    J. Alloys and Compounds, vol.282 (1999) pp.101-108.
  15. 'Solid-State Cells with Buffer Electrodes for Measurement of Thermodynamic Properties of IrO2, CaIrO3, Ca2IrO4 and Ca4IrO6',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    Journal of Electrochemical Society, vol.146, no.5 (1999) pp.1854-1861.
  16. 'System Nd-Pd-O: Phase Diagram and Thermodynamic Properties of Oxides Using a Solid State Cell with Advances Features',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    J. Phase Equil., vol.20, no.6 (1999) pp.553-564.
  17. ''Phase Equilibria and Thermodynamics in the Dy-Mg-Cl system at 1073K',
    T. Uda, T. H. Okabe, K. T. Jacob, and Y. Waseda:
    J. Alloys and Compounds, no.284 (1999) pp.282-288.
  18. 'System Cu-Rh-O: Phase Diagram and Thermodynamic Properties of CuRhO2 and CuRh2O4',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    Bull. Mater. Sci., vol.22, no.4 (1999) pp.741-749.
  19. 'Phase Relations in the System Sr-Ir-O and Thermodynamic Measurements on SrIrO3, Sr2IrO4, and Sr4IrO6 Using Solid-State Cells with Buffer Electrodes',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    J. Alloys. Compounds, vol.288 (1999) pp.188-196.
  20. 'Production of Niobium Powder by Electronically Mediated Reaction (EMR) Using Calcium as a Reductant',
    T. H. Okabe, I. Park, K. T. Jacob, and Y. Waseda:
    J. Alloys and Compounds, vol.288 (1999) pp.200-210.
  21. 'Determination of Thermodynamic Properties of Ca4PtO6 and CaPtO3 Using Solid State Cells with Buffer Electrodes',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    Zeit. Metallk., vol.90, no.7 (1999) pp.491-498.
  22. 'An Advanced Design of Solid-State Cell for Accurate Thermodynamic Measurements on Ternary Oxides: System Sm-Pd-O',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    Mater. Sci. & Eng. B, vol.B64 (1999) pp.44-53.
  23. 'Electro-oxidation of Molybdenum Concentrate in Sodium Chloride Solution',
    T. Darjaa, T. H. Okabe, Y. Waseda, and Y. Umetsu:
    J. Mining and Materials Institute of Japan, vol.115, no.10 (1999) pp.755-761.
  24. ''Solid-State Cells with Buffer Electrodes for Accurate Thermodynamic Measurements: System Nd-Ir-O',
    K. T. Jacob, T. H. Okabe, T. Uda, and Y. Waseda:
    Electrochimica Acta, vol.45 (2000) 1963-1971.
  25. 'The Standard Enthalpy and Entropy of Formation of Rh2O3 - A Third-Law Optimization',
    K. T. Jacob, T. Uda, T. H. Okabe, and Y. Waseda:
    High Temp. Mater. Processes, vol.19, no.1 (2000) pp.11-16.
  26. 'Contactless Electrochemical Reduction of Titanium (II) Chloride by Aluminum',
    T. Uda, T. H. Okabe, Y. Waseda, and K. T. Jacob:
    Metall. Mater. Trans. B, vol.31B, no.4 (2000) pp.713-721.
  27. 'Recovery of Molybdenum from Sulfide Concentrate by Electro-Oxidation and Precipitation',
    T. Darjaa, T. H. Okabe, Y. Waseda, and Y. Umetsu:
    J. Mining and Materials Institute of Japan, vol.116, no.3 (2000) pp.203-210.
  28. 'Electro-Oxidation of Molybdenum Concentrate Using Bipolar Cell, and Recovery of Rhenium',
    T. Darjaa, T. H. Okabe, Y. Waseda, and Y. Umetsu:
    J. Mining and Materials Institute of Japan, vol.116, no.6 (2000) pp.520-526.
    *** 第26回資源素材学会論文賞 ***
  29. 'Physicochemical Studies of Lithium Nitride in Molten LiCl-KCl',
    T. H. Okabe, A. Horiuchi, K. T. Jacob, and Y. Waseda:
    Materials Trans. (JIM), vol.41, no.7 (2000) pp.822-830.
  30. 'Phase Equilibria and Thermodynamics of (Silver + Rhodium + Oxygen)',
    K. T. Jacob, T. Uda, T. H. Okabe, and Y. Waseda:
    J. Chem. Thermodyn., 32 (2000) pp.1399-1408.
  31. 'Electrochemical Properties of Li3N Dissolved in Molten LiCl at 900 K',
    T. H. Okabe, A. Horiuchi, K. T. Jacob, and Y. Waseda:
    J. Electrochem. Soc., vol.148, no.5 (2001) pp.E219-E226.
  32. 'Ternary Nitrides Prepared in the Li3N - Mg3N2 System at 900 - 1000 K',
    H. Yamane, T. H. Okabe, O. Ishiyama, Y. Waseda, and M. Shimada:
    J. Alloy. Compd., vol.319 (2001) pp.124-130.
  33. 'Semi-continuous Production of Niobium Powder by Magnesiothermic Reduction of Nb2O5',
    I. Park, T. H. Okabe, Y. Waseda, H. S. Yu, and O. Y. Lee:
    Mater. Trans., vol.42, no.5 (2001) pp.850-855.
  34. 'Semi-Continuous Production of Tantalum Powder by Electronically Mediated Reaction (EMR)',
    I. Park, T. H. Okabe, Oh Yeon Lee, Chuel Ro Lee, and Y. Waseda:
    Mater. Trans. JIM, vol.43, no.8 (2002) pp.2080-2086.
  35. ''Surface Layer Formed by Selective Oxidation in High-Purity Copper-Titanium Binary Alloys',
    S. Suzuki, K. Hirabayashi, K. Mimura, T. H. Okabe, M. Issiki, and Y. Waseda:
    Materials Trans. (JIM), vol.43, no.9 (2002) pp.2303-2308.
  36. 'Direct Extraction and Recovery of Neodymium Metal from Magnet Scrap',
    T. H. Okabe, O. Takeda, K. Fukuda, and Y. Umetsu:
    Materials Trans. (JIM), vol.44, no.4 (2003) pp.798-801.
  37. 'Recovery of Platinum Using Magnesium Vapor',
    T. H. Okabe, S. Yamamoto, Y. Kayanuma, and M. Maeda:
    J. Materials Research, vol.18, no.8 (2003) pp.1960-1967.
  38. 'Platinum Recovery Using Calcium Vapor Treatment',
    T. H. Okabe, Y. Kayanuma, S. Yamamoto, and M. Maeda:
    Materials Trans. (JIM), vol.44, no.7 (2003) pp.1386-1393.
  39. 'Production of Niobium Powder by Magnesiothermic Reduction of Feed Preform',
    T. H. Okabe, S. Iwata, M. Imagunbai, and M. Maeda:
    ISIJ International, vol.43, no.12 (2003) pp.1882-1889.
  40. 'Production of Tantalum Powder by Magnesiothermic Reduction of Feed Preform',
    T. H. Okabe, N. Sato, Y. Mitsuda, and S. Ono:
    Materials Trans. (JIM), vol.44, no.12 (2003) pp.2646-2653.
  41. 'Production of Niobium Powder by Preform Reduction Process Using Various Fluxes and Alloy Reductant',
    T. H. Okabe, S. Iwata, M. Imagunbai, Y. Mitsuda, and M. Maeda:
    ISIJ International, vol.44, no.2 (2004) pp.285-293.
  42. 'Titanium Powder Production by Preform Reduction Process (PRP)',
    T. H. Okabe, T. Oda, and Y. Mitsuda:
    J. Alloys and Compounds, vol.364 (2004) pp.156-163.
  43. 'New Recovery Process for Rhodium Using Metal Vapor',
    Y. Kayanuma, T. H. Okabe, Y. Mitsuda, and M. Maeda:
    J. Alloys and Compounds, vol.365 (2004) pp.211-220.
  44. 'Phase Equilibrium of the System Ag-Fe-Nd, and Nd Extraction from Magnet Scraps Using Molten Silver',
    O. Takeda, T. H. Okabe, and Y. Umetsu:
    J. Alloys and Compounds, vol.379 (2004) pp.305-313.
  45. 'Metal Vapor Treatment for Enhancing the Dissolution of Platinum Group Metals from Automotive Catalyst Scrap',
    Y. Kayanuma, T. H. Okabe and M. Maeda:
    Metall. Mater. Trans. B, vol.35B (2004) pp.817-824.
  46. 'Evaluation of Ti-Cr-Cu Alloys for Dental Applications',
    M. Koike, M. Itoh, O. Okuno, K. Kimura, O. Takeda, T. H. Okabe, and T. Okabe:
    J. Mater. Eng. Perform., vol.14, no.6 (2005) pp.778-783.
  47. 'Development of a Recycling Process for Tantalum from Capacitor Scraps ',
    K. Mineta and T. H. Okabe:
    J. Physics and Chemistry of Solids, vol. 66, no. 2-4 (2005) pp.318-321.
  48. 'Production of Titanium Powder Directly from TiO2 in CaCl2 by Electronically Mediated Reaction (EMR) ',
    I. Park, T. Abiko, and T. H. Okabe:
    J. Physics and Chemistry of Solids, vol. 66, no. 2-4 (2005) pp.410-413.
  49. 'Phase Equilibria of the System Fe-Mg-Nd at 1076 K',
    O. Takeda, T. H. Okabe, and Y. Umetsu:
    J. Alloys and Compounds, 392 (2005) pp.206-213.
  50. 'Recovery of Neodymium from a Mixture of Magnet Scrap and Other Scrap',
    O. Takeda, T. H. Okabe, and Y. Umetsu:
    J. Alloys and Compounds, vols.408-412 (2006) pp.387-390.
  51. 'High-Speed Titanium Production by Magnesiothermic Reduction of Titanium Trichloride',
    O. Takeda and T. H. Okabe:
    Materials Trans. (JIM), vol.47, no.4 (2006) pp.1145-1154.
    *** 第32回資源素材学会論文賞 ***
  52. 'Electroplating of Titanium on Iron by Galvanic Contact Deposition in NaCl-TiCl2 Molten Salt',
    T. Uda, T. H. Okabe, Y. Waseda, and Y. Awakura:
    Sci. Technol. Adv. Mater., vol.7, no.6 (2006) pp.490-495.
  53. 'Fundamental Study on Magnesiothermic Reduction of Titanium Dichloride',
    O. Takeda and T. H. Okabe:
    Metall. Mater. Trans. B, vol.37B (2006) pp.823-830.
  54. 'Niobium Powder Production by Reducing Electrochemically Dissolved Niobium Ions in Molten Salt',
    B. Yuan and T. H. Okabe:
    J. Alloys and Compounds, vol.454 (2008) pp.185-193.
  55. 'Production of Fine Tantalum Powder by Electrochemical Method',
    B. Yuan and T. H. Okabe:
    Materials Trans. (JIM), vol. 48, no. 10 (2007) pp.2687-2694.
  56. 'Electrochemically Assisted Formation of Fine Niobium Powder in Molten Salt',
    B. Yuan and T. H. Okabe:
    J. Electrochem. Soc., vol.154, no.1 (2007) pp.E1-E7.
  57. 'Production of Titanium Powder by the Calciothermic Reduction of Titanium Concentrates or Ore Using the Preform Reduction Process',
    H. Zheng, H. Ito, and T. H. Okabe:
    Materials Trans. (JIM), vol.48, no.8 (2007) pp.2244-2251.
  58. 'Production of Fine Tantalum Powder by Preform Reduction Process Using Mg-Ag Alloy Reductant',
    B. Yuan and T. H. Okabe:
    J. Alloys and Compounds, vol.443 (2007) pp.71-80.
  59. 'Fundamental Study on Synthesis and Enrichment of Titanium Subchloride',
    O. Takeda and T. H. Okabe:
    J. Alloys and Compounds, vol.457 (2008) pp.376-383.
  60. 'Recovery of Titanium Metal Scrap by Utilizing Chloride Wastes',
    H. Zheng and T. H. Okabe:
    J. Alloys and Compounds, vol. 461 (2008) pp. 459-466.
  61. 'Production of Scandium and Al-Sc Alloy by Metallothermic Reduction',
    M. Harata, T. Nakamura, H. Yakushiji, and T. H. Okabe:
    Mineral Processing and Extractive Metallurgy (Trans. Inst. Min Metall. C) vol. 117, no. 2 (2008) pp.95-99  (Edited version of the paper published in the proceedings of Sohn International Symposium on Advanced Processing of Metals and Materials, published by TMS (2006)).
  62. 'Electrochemical production of Al-Sc alloy in CaCl2-Sc2O3 molten salt',
    M. Harata, K. Yasuda, H. Yakushiji and T. H. Okabe:
    J. Alloys and Compounds, vol.474, no.1-2 (2009) pp.124-130.
  63. 'Gamow-Teller Strength Distributions in 48Sc by the 48Ca(p,n) and 48Ti(n,p) Reactions and Two-Neutrino Double-beta Decay Nuclear Matrix Elements',
    K. Yako, M. Sasano, K. Miki, H. Sakai, M. Dozono, D. Frekers, M.B. Greenfield, K. Hatanaka, E. Ihara, M. Kato, T. Kawabata, H. Kuboki, Y. Maeda, H. Matsubara, K. Muto, S. Noji, H. Okamura, T.H. Okabe, S. Sakaguchi, Y. Sakemi, Y. Sasamoto, K. Sekiguchi, Y. Shimizu, K. Suda, Y. Tameshige, A. Tamii, T. Uesaka, T. Wakasa, and H. Zheng:
    Phys. Rev. Lett., vol.103, no.1 (2009) 012503.
  64. 'New Method for Production of Solar-Grade Silicon by Subhalide Reduction ',
    K. Yasuda, K. Saegusa, and T. H. Okabe:
    Materials Trans. (JIM), vol.50, no.12 (2009) pp.2873-2878.
  65. 'Production of Metallic Vanadium by Preform Reduction Process',
    A. Miyauchi, and T. H. Okabe:
    Materials Trans. (JIM), vol.51, no.6 (2010) pp.1102-1108.
  66. 'Production of Solar-grade Silicon by Halidothermic Reduction of Silicon Tetrachloride',
    K. Yasuda, K. Saegusa, and T. H. Okabe:
    Metall. Mater. Trans. B, vol. 42B, no. 1, pp.37-49 (2011).
  67. 'Aluminum Subhalide as a Reductant for Metallothermic Reduction',
    K. Yasuda, K. Saegusa, and T. H. Okabe:
    High Temperature Materials and Processes,vol.30, no.4 (2011), pp.411-423.
  68. 'Ruthenium Solubility and Dissolution Behavior in Molten Slag',
    H. Shuto, T. H. Okabe, and K. Morita:
    Materials Trans. (JIM), vol.52, no.10 (2011) pp.1899-1904
  69. 'Effective Dissolution of Platinum by Using Chloride Salts in Recovery Process',
    C. Horike, K. Morita, and T. H. Okabe:
    Metall. Mater. Trans. B, vol.43B, no.6 (2012), pp.1300-1307.
    *** The ASM Henry Marion Howe Medal for 2013, ASM International受賞論文***
  70. 'Dissolution Behavior of Rhodium in the Na2O-SiO2 and the CaO-SiO2 Slag',
    C. Wiraseranee, T. H. Okabe, K. Morita:
    Metall. Mater. Trans. B., vol.44B, no.3 (2013) pp.584-592.
  71. 'Effect of Al2O3, MgO, and CuOx on the Dissolution Behavior of Rhodium in the Na2O-SiO2 Slags',
    C. Wiraseranee, T. Yoshikawa, T. H. Okabe, K. Morita:
    Journal of Mining and Metallurgy, Section B: Metallurgy - vol. 49 (2) B (2013) pp. 131-138.
  72. 'Upgrading Titanium Ore through Selective Chlorination using Calcium Chloride'
    J. Kang and T. H. Okabe:
    Metall. Mater. Trans. B, vol. 44B, no. 3, (2013) pp.516-527.
  73. 'Removal of Iron from Titanium Ore through Selective Chlorination Using Magnesium Chloride'
    J. Kang and T. H. Okabe:
    Materials Trans. (JIM), vol.54, no. 8 (2013) pp.1444-1453.
    *** 第62回日本金属学会論文賞 (材料プロセシング部門) (2014年) ***
  74. 'Production of Titanium Dioxide Directly from Titanium Ore Through Selective Chlorination Using Titanium Tetrachloride'
    J. Kang and T. H. Okabe:
    Materials Trans. (JIM), vol.55, no. 3 (2014) pp.591-598.
    ***第40回資源・素材学会論文賞 (2015年) ***
  75. 'Dissolution behaviour of platinum group metals into molten slags',
    K. Morita, C. Wiraseranee1, H. Shuto, S. Nakamura, K. Iwasawa, T. H. Okabe, N. Sano:
    Mineral Processing and Extractive Metallurgy (Trans. Inst. Min Metall. C), vol.123, no. 1, (2014) pp.29-34.
  76. 'Thermodynamic Consideration of the Removal of Iron from Titanium Ore by Selective Chlorination'
    J. Kang and T. H. Okabe:
    Metall. Mater. Trans. B, vol. 45B, no.4 (2014) pp.1260-1271.
  77. 'Dissolution Behavior of Platinum in the Na2O-SiO2 - Based Slags',
    C. Wiraseranee, T. Yoshikawa, T. H. Okabe, K. Morita:
    Materials Trans. (JIM), vol.55, no.7 (2014) pp.1083-1090.
  78. 'Reaction-mediator-based chlorination for the recycling of titanium metal scrap utilizing chloride waste',
    Yu-ki Taninouchi1, Yuki Hamanaka, and T. H. Okabe:
    Materials Trans. (JIM), vol. 56, no.1, (2015) pp.1-9
  79. 'Development of a Novel Titania Slag Upgrading Process Using Titanium Tetrachloride',
    J. Kang and T. H. Okabe:
    Metall. Mater. Trans. B, vol.47B, no.1 (2016) pp.320-329.
  80. 'Removal of Iron from Titanium Ore by Selective Chlorination Using TiCl4 under High Oxygen Chemical Potential ',
    J. Kang and T. H. Okabe:
    International Journal of Mineral Processing, 149 (2016) pp.111-118.
  81. 'Direct Oxygen Removal Technique for Recycling Titanium Using Molten MgCl2 Salt',
    Toru H. Okabe, Yuki Hamanaka, and Yu-ki Taninouchi:
    Faraday Discussions, 190 (2016) pp. 109-126.
  82. 'Chlorination-Volatilization Behavior of Titanium Metal Scraps during Recycling Using Reaction-Mediating Molten Salt',
    Yu-ki Taninouchi, Yuki Hamanaka, and Toru H. Okabe:
    Materials Trans. (JIM), vol. 57, no.8, (2016) pp.1309-1318.
  83. 'Electrochemical Deoxidation of Titanium and Its Alloy Using Molten Magnesium Chloride',
    Yu-ki Taninouchi, Yuki Hamanaka, and Toru H. Okabe:
    Metall. Mater. Trans. B, vol.47, no.6 (2016) pp.3394-3404.
  84. 'Selective Removal of Iron from Low-Grade Ti Ore by Reacting with Calcium Chloride',
    J. Kang and T. H. Okabe:
    Metall. Mater. Trans. B, vol.48B, no.1 (2017) pp.294-301.
  85. 'Recovery of Nickel from Nickel-Based Superalloy Scraps by Utilizing Molten Zinc',
    Ryohei Yagi and Toru H. Okabe:
    Metall. Mater. Trans. B, vol. 48, no. 1 (2017) pp.335-345.
  86. 'Recovery of Platinum Group Metals from Spent Catalysts Using Electroless Nickel Plating and Magnetic Separation ',
    Yu-ki Taninouchi, Tesuo Watanabe, and Toru H. Okabe:
    Materials Trans. (JIM), vol.58, no.3 (2017) pp.410-419.
  87. 'Optimum Conditions for Extracting Rare Earth Metals from Waste Magnets by Using Molten Magnesium',
    Tomohiko Akahori, Yu Miyamoto, Tomonori Saeki, Masahide Okamoto, Toru H. Okabe:
    J. Alloys and Compounds, vol. 703 (2017) pp. 337-343.
  88. 'Bottlenecks in Rare Metal Supply and the Importance of Recycling - a Japanese Perspective',
    Toru H. Okabe:
    Mineral Processing and Extractive Metallurgy, vol.126, no.1-2, (2017) pp.22-32.
  89. 'Design, Test and Theoretical Assessments for Reduction of Titanium Oxide to Produce Titanium in Molten Salt',
    K. ono, Toru H. Okabe, R. O. Suzuki:
    Materials Trans. (JIM), vol. 58, no.3, (2017) pp.313-318.
  90. 'Continuous Extraction of Nickel from Superalloy Scraps Using Zinc Circulation',
    R. Yagi and T. H. Okabe:
    Metall. Mater. Trans. B, vol.48, no.3, (2017) pp.1494-1501.
  91. 'Magnetic Concentration of Platinum Group Metals from Catalyst Scraps Using Iron Deposition Pretreatment',
    Yu-ki Taninouchi, Tesuo Watanabe, and Toru H. Okabe:
    Metall. Mater. Trans. B, vol.48, no.4, (2017) pp.2027-2036.
  92. 'Experimentally Determined Phase Diagram for the Barium Sulfide-Copper(I) Sulfide System Above 873 K (600°C)',
    Caspar Stinn, Katsuhiro Nose, Toru H. Okabe, Antoine Allanore:
    Metall. Mater. Trans. B, vol.48, no.6, (2017) pp.2922-2929.
  93. 'Enhanced Dissolution of Platinum Group Metals By Utilizing Electroless Iron Deposition',
    Yu-ki Taninouchi and T. H. Okabe:
    Metall. Mater. Trans. B, vol.48, no.6, (2017) pp.2866-2872.
  94. 'Effective Alloying Treatment for Platinum Using Iron Chloride Vapor',
    Yu-ki Taninouchi and T. H. Okabe:
    Materials Trans. (JIM), vol.59, no.1, (2018) pp.88-97.
  95. 'Thermodynamic Considerations of Direct Oxygen Removal from Titanium by Utilizing the Deoxidation Capability of Rare-Earth Metals',
    T. H. Okabe, Chenyi Zheng, and Yu-ki Taninouchi:
    Metall. Mater. Trans. B, vol.49, no.3 (2018) pp.1056-1066.
  96. 'Selective Extraction and Recovery of Nd and Dy from Nd-Fe-B Magnet Scrap by Utilizing Molten MgCl2',
    Sakae Shirayama and T. H. Okabe:
    Metall. Mater. Trans. B, vol.49, no.3 (2018) pp.1067-1077.
  97. 'Recovery of Platinum Group Metals from Spent Catalysts Using Iron Chloride Vapor Treatment',
    Yu-ki Taninouchi and T. H. Okabe:
    Metall. Mater. Trans. B, vol.49, no.4 (2018) pp.1781-1793.
    ***TMS Extraction & Processing Division Pyrometallurgy Best Paper Award (2020)***
  98. 'Thermodynamic Analysis of Deoxidation of Titanium Through the Formation of Rare-Earth Oxyfluorides',
    T. H. Okabe, Yu-ki Taninouchi, and Chenyi Zheng:
    Metall. Mater. Trans. B, vol.49, no.6 (2018) pp.3107-3117.
  99. 'Production of high-grade titanium dioxide directly from titanium ore using titanium scrap and iron chloride waste',
    J. Kang, G. Moon, M-S. Kim, and T. H. Okabe:
    Metals and Materials International, vol.25, no.1 (2019) pp.257-267.
  100. 'Dissolution Behavior of Iron and Steel Materials in Liquid Magnesium',
    Yu-ki Taninouchi, Katsuhiro Nose, and Toru H. Okabe:
    Metall. Mater. Trans. B, vol.49, no.6 (2018) pp.3432-3443.
  101. 'Deoxidation of Titanium Using Mg as a Deoxidant in MgCl2-YCl3 flux',
    Chenyi Zheng, Takanari Ouchi, Akihiro Iizuka, Yu-ki Taninouchi, and Toru H. Okabe:
    Metall. Mater. Trans. B, vol.50, no.2 (2019) pp.622-631.
  102. 'Electrochemical Deoxidation of Titanium in Molten MgCl2-YCl3',
    Chenyi Zheng, Takanari Ouchi, Lingxin Kong, Yu-ki Taninouchi, and Toru H. Okabe:
    Metallurgical and Materrials Transactions B, vol.50, no.4 (2019) pp.1652?1661.
  103. 'Direct Deoxidation of Ti by Mg in MgCl2-HoCl3 flux',
    Lingxin Kong, Takanari Ouchi, and Toru H. Okabe:
    Materials Transactions, vol.60, no.9 (2019) pp.2059?2068.
  104. 'Electrochemical Deoxidation of Titanium Scrap in MgCl2-HoCl3 System',
    Lingxin Kong, Takanari Ouchi, Chenyi Zheng, and Toru H. Okabe:
    Journal of The Electrochemical Society, vol.166, no.13 (2019) pp.E429-E437.
  105. 'Ultimate Deoxidation Method of Titanium Utilizing Y/YOCl/YCl3 Equilibrium',
    Akihiro Iizuka, Takanari Ouchi, and Toru H. Okabe:
    Metallurgical and Materials Transactions B, vol.51, no.2 (2020) pp.433-442.
  106. 'Development of a New Titanium Powder Sintering Process with Deoxidation Reaction Using Yttrium Metal',
    Akihiro Iizuka, Takanari Ouchi, and Toru H. Okabe:
    Materials Transactions, vol.61, no.4 (2020) pp.758-765.
  107. 'Lanthanothermic Reduction of TiO2',
    Takara Tanaka, Takanari Ouchi, and Toru H. Okabe:
    Metallurgical and Materials Transactions B, vol.51, no.4 (2020) pp.1485-1494.
  108. 'Deoxidation of Ti using Ho in HoCl3 flux and determination of thermodynamic data of HoOCl',
    Lingxin Kong, Takanari Ouchi, and Toru H. Okabe:
    Journal of Alloys and Compounds, vol.863 (2021) 156047
  109. 'Recycling of Gold Using Anodic Electrochemical Deposition from Molten Salt Electrolyte',
    Takanari Ouchi, Shuang Wu, and Toru H. Okabe:
    Journal of The Electrochemical Society, vol.167 (2020) 123501
  110. 'Yttriothermic Reduction of TiO2 in Molten Salts',
    Takara Tanaka, Takanari Ouchi, and Toru H. Okabe:
    Materials Transactions, vol.61, no.10 (2020) pp.1967-1973.
    *** 第69回日本金属学会論文賞 (材料プロセシング部門) (2021年) ***
  111. 'Magnesiothermic Reduction of TiO2 Assisted by LaCl3',
    Takara Tanaka, Takanari Ouchi, and Toru H. Okabe:
    Journal of Sustainable Metallurgy, vol.6, no.4 (2020) pp.667-679.
  112. 'Molten Salt Electrolysis of Magnesium Oxide Using a Liquid-Metal Cathode for the Production of Magnesium Metal',
    Tae-Hyuk Lee, Toru H. Okabe, Jin-Young Lee, Young Min Kim, and Jungshin Kang:
    Metallurgical and Materials Transactions B, vol.51, no.6 (2020) pp.2993-3006.
  113. 'Solubilities of Nickel, Iron, and Chromium in Liquid Magnesium in the Presence of Austenitic Stainless Steel',
    Yu-ki Taninouchi and Toru H. Okabe:
    Metallurgical and Materials Transactions B, vol.52, no.2 (2021) pp.611-624.
  114. 'Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode',
    Tae-Hyuk Lee, Toru H. Okabe, Jin-Young Lee, Young Min Kim, and Jungshin Kang:
    Journal of Magnesium and Alloys, vol.9, no.5 (2021) pp.1644-1655.
  115. 'Scale-Up Study of Molten Salt Electrolysis using Cu or Ag Cathode and Vacuum Distillation for the Production of High-Purity Mg Metal from MgO',
    Dong-Hee Lee, Hyeong-Jun Jeoung, Tae-Hyuk Lee, Kyung-Woo Yi, Jin-Young Lee, Young Min Kim, Toru H. Okabe, and Jungshin Kang:
    Journal of Sustainable Metallurgy, vol.7, no.3 (2021) pp.883-897.
  116. 'Thermodynamic Consideration of Direct Oxygen Removal from Titanium by Utilizing Vapor of Rare Earth Metals',
    Toru H. Okabe, Lingxin Kong, and Takanari Ouchi:
    Metallurgical and Materials Transactions B, vol.53, no.2 (2022) pp.1269-1282.
  117. 'New Deoxidation Method of Titanium Using Metal Filter in Molten Salt',
    Akihiro Iizuka, Takanari Ouchi, and Toru H. Okabe:
    Metallurgical and Materials Transactions B, vol.53, no.3 (2022) pp.1371-1382.
  118. 'Solubility of Chromium in Liquid Magnesium',
    Yu-ki Taninouchi, Tsubasa Yamaguchi, Toru H. Okabe, and Hiroaki Nakano:
    Metallurgical and Materials Transactions B, vol.53, no.3 (2022) pp.1851-1857.
  119. 'Deoxidation of Titanium Using Cerium?Chloride Flux for Upgrade Recycling of Titanium Scraps',
    Gen Kamimura, Takanari Ouchi, and Toru H. Okabe:
    Materials Transactions, vol.63, no.6 (2022) pp.893-902.
  120. 'Dissolution Behavior of Ferritic Stainless Steel in Liquid Magnesium',
    Yu-ki Taninouchi, Tsubasa Yamaguchi, Toru H. Okabe, and Hiroaki Nakano:
    ISIJ International, vol.63, no.1 (2023) pp.150-158.