Study on thermoelectric properties of Na-B-Si having B icosahedral network with Si one-dimensional chain

• Project/Area Number: 25820327
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tohoku University
• Principal Investigator: MORITO Haruhiko 東北大学, 多元物質科学研究所, 助教 (80463800)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 熱電変換材料 / ホウ化物 / 反応焼結 / 新規ホウ化物 / 新規結晶構造 / ナトリウム / ホウ素 / シリコン

Outline of Final Research Achievements

Thermoelecric propeties of new compound Na-B-Si were studied to develop a high-temperature thermoelectric material. The bulk ceramic of Na-B-Si was obtained by heating a boron compact in sodium-silicon solution at 900℃. The thermoelectric properties of the sample increased with increasing temperature.

Research Products

• [Journal Article] Crystal structure analysis of Na4Si4-xGex by single crystal X-ray diffraction (2015)
  • Author(s): Haruhiko Morito, Kenji Momma, and Hisanori Yamane
  • Journal Title: Journal of Alloys and Compounds Volume: 623 Pages: 473-479
  • DOI: 10.1016/j.jallcom.2014.10.165
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Low-temperature synthesis of Si and Si-based compounds using Na (2014)
  • Author(s): Haruhiko Morito
  • Journal Title: Journal of the Ceramic Society of Japan Volume: 122 Issue: 1432 Pages: 971-975
  • DOI: 10.2109/jcersj2.122.971
  • NAID: 130004951078
  • ISSN: 1348-6535, 1882-0743
  • Peer Reviewed
• [Presentation] ボールミルで調整した原料粉末を用いたNaB5Cバルク体の反応焼結 (2015)
  • Author(s): 森戸春彦、木村巧磨、山根久典
  • Organizer: 2015年日本セラミックス協会年会
  • Place of Presentation: 岡山
  • Year and Date: 2015-03-18 – 2015-03-20
• [Presentation] Na4Si4-xGex (x = 0-4)固溶体の単結晶構造解析 (2014)
  • Author(s): 森戸春彦、門間健司、山根久典
  • Organizer: 日本金属学会2014年秋期（第155回）大会
  • Place of Presentation: 名古屋
  • Year and Date: 2014-09-24 – 2014-09-26
• [Presentation] Na を用いた二ホウ化ジルコニウムの低温合成 (2014)
  • Author(s): 越路健二郎、森戸春彦、山根久典
  • Organizer: 平成26年度 化学系学協会東北大会
  • Place of Presentation: 米沢
  • Year and Date: 2014-09-20 – 2014-09-21
• [Presentation] Reaction sintering of NaB5C ceramics and their fracture strengths (2014)
  • Author(s): Haruhiko Morito, Takuma Kimura, Hisanori Yamane
  • Organizer: The 18th International Symposium on Boron, Borides and Related Materials
  • Place of Presentation: Hawaii, Honolulu
  • Year and Date: 2014-09-01 – 2014-09-05
• [Presentation] シリコン・ナトリウム溶液を用いた材料合成 (2014)
  • Author(s): 森戸春彦
  • Organizer: 日本セラミックス協会2014年年会
  • Place of Presentation: 神奈川
  • Invited
• [Presentation] 反応焼結法を用いたNaB5C バルク体の合成 (2014)
  • Author(s): 木村巧磨、森戸春彦、山根久典
  • Organizer: 日本金属学会2014年春期（第154回）大会
  • Place of Presentation: 東京
• [Presentation] Synthesis and thermoelectric properties of sodium carbaboride (2013)
  • Author(s): H. Morito, J. Anzai, T. Kimura, T. Yamada, and H. Yamane
  • Organizer: The 32nd International Conference on Thermoelectrics
  • Place of Presentation: Kobe
• [Presentation] Synthesis of Si-Ge solid solutions from Na-Si-Ge compounds (2013)
  • Author(s): K. Momma, H. Morito, and H. Yamane
  • Organizer: International Symposium for the 70th Anniversary of the Tohoku Branch of the Chemical Society of Japan
  • Place of Presentation: Sendai
• [Presentation] Synthesis and characterization of NaB5C ceramics (2013)
  • Author(s): T. Kimura, H. Morito, and H. Yamane
  • Organizer: International Symposium for the 70th Anniversary of the Tohoku Branch of the Chemical Society of Japan
  • Place of Presentation: Sendai
• [Presentation] 反応焼結法を用いたNaB5C バルク体の合成 (2013)
  • Author(s): 木村巧磨、森戸春彦、山根久典
  • Organizer: 日本セラミックス協会東北北海道支部研究発表会
  • Place of Presentation: 長岡
• [Presentation] Synthesis and mechanical property of NaB5C ceramics (2013)
  • Author(s): H. Morito, T. Kimura, and H. Yamane
  • Organizer: Materials Science & Technology 2013
  • Place of Presentation: Montréal, Canada