Thermodynamic Measurement of Oxide Systems Containing Phosphorus by Knudsen Cell Mass Spectrometry

• Project/Area Number: 21860022
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Metal making engineering
• Research Institution: The University of Tokyo
• Principal Investigator: NAGAI Takashi The University of Tokyo, 生産技術研究所, 助教 (40533633)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥2,678,000 (Direct Cost: ¥2,060,000、Indirect Cost: ¥618,000); Fiscal Year 2010: ¥1,274,000 (Direct Cost: ¥980,000、Indirect Cost: ¥294,000); Fiscal Year 2009: ¥1,404,000 (Direct Cost: ¥1,080,000、Indirect Cost: ¥324,000)
• Keywords: 質量分析法 / 熱力学 / 脱リン / 酸化物 / 金属生産工学

Research Abstract

Double Knudsen mass spectrometry was adapted to thermodynamic measurements of oxide systems. Using this technique to measure thermodynamic properties of oxide systems containing phosphorus oxide, the Gibbs energies of formation of calciumand aluminum phosphates were estimated. In addition, the thermodynamic measurements for activity of phosphorus oxide in molten or multi phase flux, which is used in de-phosphorization process of iron and steel making industry, are also achieved.

Research Products

• [Journal Article] Thermodynamic Measurement of Di-calcium Phosphate by Double Knudsen Cell Mass Spectrometry (2011)
  • Author(s): T.Nagai, Y.Tanaka, M.Maeda
  • Journal Title: Metallurgical and Materials Transactions B, (accepted)
  • Peer Reviewed
• [Journal Article] Thermodynamic Measurement of Di-calcium Phosphate by Double Knudsen Cell Mass Spectrometry (2011)
  • Author(s): T.Nagai, Y.Tanaka, M.Maeda
  • Journal Title: Metallurgical and Materials Transactions B Volume: 掲載確定
  • Peer Reviewed
• [Journal Article] Thermodynamic Measurement of Aluminum Phosphate by Double Knudsen Cell Mass Spectrometry (2010)
  • Author(s): T.Nagai, Y.Tanaka, M.Maeda
  • Journal Title: Journal of Chemical Thermodynamics Vol.42 Pages: 999-1003
  • Peer Reviewed
• [Presentation] Thermodynamic Measurement of CaO-P_2O_5-SiO_2 System (2011)
  • Author(s): 永井崇, H.Kimura, M.Maeda
  • Organizer: 2011 TMS Annual Meeting & Exhibition
  • Place of Presentation: San Diego, CA, USA
  • Year and Date: 2011-02-28
• [Presentation] Thermodynamic Measurement of CaO-P_2O_5-SiO_2 System (2011)
  • Author(s): T.Nagai, H.Kimura, M.Maeda
  • Organizer: 2011 TMS Annual Meeting & Exhibition
  • Place of Presentation: San Diego, USA
  • Year and Date: 2011-02-27
• [Presentation] 質量分析法によるリン酸化合物の熱力学測定 (2010)
  • Author(s): 永井崇,前田正史
  • Organizer: 資源・素材学会
  • Place of Presentation: 福岡
  • Year and Date: 2010-09-15
• [Presentation] 質量分析法によるリン酸化合物の熱力学測定 (2010)
  • Author(s): 永井崇, 前田正史
  • Organizer: 資源素材学会
  • Place of Presentation: 九州大学
  • Year and Date: 2010-09-15
• [Presentation] Thermodynamic Measurement of Phosphorus Oxide in Oxide System by Double Knudsen Cell Mass Spectrometry (2010)
  • Author(s): 永井崇
  • Organizer: 2010 TMS Annual Meeting & Exhibition
  • Place of Presentation: 米国・シアトル
  • Year and Date: 2010-02-18
• [Presentation] Thermodynamic Measurement of Phosphorus Oxide in Oxide Systems by Double Knudsen Cell Mass Spectrometry (2010)
  • Author(s): T.Nagai, M.Maeda
  • Organizer: 2010 TMS Annual Meeting & Exhibition
  • Place of Presentation: Seattle, WA, USA
  • Year and Date: 2010-02-15
• [Presentation] 質量分析法によるリン酸化合物の熱力学測定 (2009)
  • Author(s): 永井崇,前田正史
  • Organizer: 日本金属学会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-15