Preparation of Layered Titanium Sulfides with Homogeneous Composition and Improvement in their Thermoelectric Properties through Natural Superlattice Appro

• Project/Area Number: 20760509
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Metal making engineering
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: OHTA Mchihiro National Institute of Advanced Industrial Science and Technology, エネルギー技術研究部門, 研究員 (50443172)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 熱電変換 / 廃熱利用 / 硫化物熱電材料 / チタン硫化物 / 希土類硫化物 / シェブレル相硫化物 / ナノ空間制御 / 自然超格子構造 / 金属生産工学 / 構造・機能材料 / 硫化チタン / シェブレル相 / 熱電交換 / 硫化物 / ゼーベック係数 / 電気抵抗率 / 熱伝導率

Research Abstract

産業、民生、運輸部門において、我々は大量のエネルギーを廃熱として棄てている。熱電材料は、廃熱を電気エネルギーに直接変換して回収できるために、大きな注目を集めている。本研究では、チタン硫化物、希土類硫化物、シェブレル相硫化物といった硫化物熱電材料を創製し、自然超格子構造内などに存在するナノ空間を制御することによって、その熱電特性を向上させた。さらに、開発した硫化物熱電材料を用いて、廃熱回収のための熱電発電モジュールを作製した。

Research Products

• [Journal Article] 高い性能指数を示すn型とp型硫化物熱電材料 (2010)
  • Author(s): 太田道広
  • Journal Title: 日本熱電学会誌 Vol.6 Pages: 7-10
  • Peer Reviewed
• [Journal Article] 高い性能指数を示すn型とp型硫化物編材料 (2010)
  • Author(s): 太田道広
  • Journal Title: 日本熱電学会誌 VOL.6 Pages: 7-10
  • Peer Reviewed
• [Journal Article] Preparation and Thermoelectric Properties of Chevrel-Phase CuxMo6S8 (2.0 ≤ x ≤ 4.0) (2009)
  • Author(s): Michihiro OHTA, Haruhiko OBARA, Atsushi YAMAMOTO
  • Journal Title: Materials Transactions Vol.50,No.9 Pages: 2129-2133
  • Peer Reviewed
• [Journal Article] Thermal Decomposition of NH4SCN for Preparation of Ln2S3 (Ln = La and Gd) by Sulfurization (2009)
  • Author(s): Michihiro OHTA, Shinji HIRAI, Hisanaga KATO, Vladimir V. SOKOLOV, Vladimir V. BAKOVETS
  • Journal Title: Materials Transactions Vol.50,No.7 Pages: 1885-1889
  • Peer Reviewed
• [Journal Article] Synthesis of Multinary Rare-earth Sulfides PrGdS3, NdGdS3, and SmEuGdS4, and Investigation of their Thermoelectric Properties (2009)
  • Author(s): Michihiro OHTA, Toshihiro KUZUYA, Hideto SASAKI, Taku KAWASAKI, Shinji HIRAI
  • Journal Title: Journal of Alloys and Compounds Vol.484 Pages: 268-272
  • Peer Reviewed
• [Journal Article] Thermoelectric Properties of NdGd1+xS3 Prepared by CS2 Sulfurization (2009)
  • Author(s): Michihiro OHTA, Shinji HIRAI
  • Journal Title: Journal of Electronic Materials Vol.38,No.7 Pages: 1287-1292
  • Peer Reviewed
• [Journal Article] Thermal Decomposition of NH_4SCN for Preparation of Ln_2S_3 (Ln=La and Gd) by Sulfurization (2009)
  • Author(s): 太田道広
  • Journal Title: Materials Transactions VOL.502 Pages: 1885-1889
  • Peer Reviewed
• [Journal Article] Preparation and Thermoelectric Properties of Chevrel-Phase Cu_xMo_6S_8(2.0<x<4.0) (2009)
  • Author(s): 太田道広
  • Journal Title: Materials Transactions VOL.50 Pages: 2129-2133
  • Peer Reviewed
• [Journal Article] Thermoelectric Properties of Chevrel-Phase Sulfides MxMo6S8 (M: Cr, Mn, Fe, Ni)
  • Author(s): Michihiro OHTA, Atsushi YAMAMOTO, Haruhiko OBARA
  • Journal Title: Journal of Electronic Materials (印刷中)
  • Peer Reviewed
• [Journal Article] Thermoelectric Properties of Chevrel-Phase Sulfides M_xMo_6S_8(M : Cr, Mn, Fe, Ni)
  • Author(s): 太田道広
  • Journal Title: Journal of Electronic Materials (印刷中)
  • Peer Reviewed
• [Journal Article] Thermoelectric Properties of NdGd_<1-X>S_3 Prepared by CS_2 Sulfurization
  • Author(s): Michihiro OHTA
  • Journal Title: Journal of Electronic Materials (掲載待ち)
  • Peer Reviewed
• [Journal Article] Synthesis of Multinary Rare-earth Sulfides PrGdS_3, NdGdS_3, and SmEuGdS_4, and Investigation of their Thermoelectric Properties
  • Author(s): Michihiro OHTA
  • Journal Title: Journal of Alloys and Compounds (掲載待ち)
  • Peer Reviewed
• [Presentation] CS_2ガス硫化法で作製したGd自己ドープLnGd_1+xS_3(Ln:La,Sm)の熱電特性 (2010)
  • Author(s): 太田道広
  • Organizer: 日本金属学会2010年春期(第146回)大会
  • Place of Presentation: 筑波大学(茨城県)
  • Year and Date: 2010-03-30
• [Presentation] Preparation and Thermoelectric Properties of Self-doped LnGd1+xS3 (Ln: La, Sm) and Mn-doped Gd2S3 (2010)
  • Author(s): Michihiro OHTA, Shinji HIRAI, Vladimir V. SOKOLOV, Toshihiro KUZUYA, Vladimir V. BAKOVETS, Sadyk M. LUGUEV
  • Organizer: 29th International Conference on Thermoelectrics
  • Place of Presentation: 上海, 中国
• [Presentation] Thermoelectric Properties of TiS2 Prepared by CS2 Sulfurization (2010)
  • Author(s): Michihiro OHTA, Shuhei SATOH, Massoud OMAR, Toshihiro KUZUYA, Shinji HIRAI
  • Organizer: 29th International Conference on Thermoelectrics
  • Place of Presentation: 上海, 中国
• [Presentation] CS2ガス硫化法で作製したGd自己ドープLnGd1+xS3(Ln: La, Sm)の熱電特性 (2010)
  • Author(s): 太田道広、平井伸治、葛谷俊博
  • Organizer: 日本金属学会2010年秋期(第146回)大会
  • Place of Presentation: 筑波大学、つくば市
• [Presentation] Thermoelectric Properties of Cu-Filled Chevrel-Phase Sulfides (2009)
  • Author(s): 太田道広
  • Organizer: 11th International Conference on Advanced Materials
  • Place of Presentation: リオデジャネイロ(ブラジル)
  • Year and Date: 2009-09-22
• [Presentation] シェブレル相硫化物M_xMo_6S_8(M=Fe,Co,Ni,Cu)の熱電特性 (2009)
  • Author(s): 太田道広
  • Organizer: 日本金属学会2009年秋期(第145回)大会
  • Place of Presentation: 京都大学(京都府)
  • Year and Date: 2009-09-17
• [Presentation] TiO_2のCS_2ガス硫化によるTi_1+xS_2の合成と焼結 (2009)
  • Author(s): 佐藤脩平
  • Organizer: 日本金属学会2009年秋期(第145回)大会
  • Place of Presentation: 京都大学(京都府)
  • Year and Date: 2009-09-17
• [Presentation] Preparation and Thermoelectric Properties of Nonstoichiometric NdGdS3 with Gd Excess (2009)
  • Author(s): 太田道広、平井伸治
  • Organizer: International Conference of Processing Materials for Properties, MMIJ Session(PMP-III札幌分科会2009)
  • Place of Presentation: 北海道大学、札幌市
  • Year and Date: 2009-09-07
• [Presentation] Preparation and Thermoelectric Properties of Nonstoichiometric NdGdS_3 with Gd Excess (2009)
  • Author(s): 太田道広
  • Organizer: International Conference of Processing Materials for Properties, MMIJ Session
  • Place of Presentation: 北海道大学(北海道)
  • Year and Date: 2009-09-07
• [Presentation] シェブレル相硫化物M_xMo_6S_8(M=Fe,Co,Ni,Cu)のM充填量が熱電特性に及ぼす影響 (2009)
  • Author(s): 太田道広
  • Organizer: 第六回日本熱電学会学術講演会
  • Place of Presentation: 東北大学(宮城県)
  • Year and Date: 2009-08-10
• [Presentation] Thermoelectric Properties of Chevrel Phases M_2Mo_6S_8(M:Cu,Ni) (2009)
  • Author(s): 太田道広
  • Organizer: 28th International Conference on Thermoelectrics and 7th European Conference on Thermoelectrics
  • Place of Presentation: フライブルク(ドイツ)
  • Year and Date: 2009-07-27
• [Presentation] Thermoelectric Properties of Self-doped NdGd1+xS3 Prepared by CS2 Sulfurization (2009)
  • Author(s): Michihiro OHTA, Shinji HIRAI, Toshihiro KUZUYA
  • Organizer: 2nd Thermopower Symposium CH- 2009 Novel Thermoelectric Materials, Devices and Applications
  • Place of Presentation: デューベンドルフ, スイス
  • Year and Date: 2009-07-24
• [Presentation] Thermoelectric Properties of Self-doped NdGd_1+xS_3 Prepared by CS_2 Sulfurization (2009)
  • Author(s): 太田道広
  • Organizer: 2nd Thermopower Symposium CH-2009 Novel Thermoelectric Materials, Devices and Applications
  • Place of Presentation: チューリッヒ(スイス)
  • Year and Date: 2009-07-24
• [Presentation] Thermoelectric Properties of Cu-Filled Chevrel-Phase Sulfides (2009)
  • Author(s): Michihiro OHTA, Atsushi YAMAMOTO, Haruhiko OBARA
  • Organizer: 11th International Conference on Advanced Materials (ICAM2009)
  • Place of Presentation: リオデジャネイロ, ブラジル
• [Presentation] シェブレル相硫化物MxMo6S8(M = Fe, Co, Ni, Cu)の熱電特性 (2009)
  • Author(s): 太田道広、山本淳、小原春彦
  • Organizer: 日本金属学会2009年秋期(第145回)大会
  • Place of Presentation: 京都大学吉田キャンパス、京都市
• [Presentation] TiO2のCS2ガス硫化によるTi1+xS2の合成と焼結 (2009)
  • Author(s): 佐藤脩平、葛谷俊博、平井伸治、太田道広
  • Organizer: 日本金属学会2009年秋期(第145回)大会
  • Place of Presentation: 京都大学吉田キャンパス、京都市
• [Presentation] シェブレル相硫化物MxMo6S8(M = Fe, Co, Ni, Cu)のM充填量が熱電特性に及ぼす影響 (2009)
  • Author(s): 太田道広、山本淳、小原春彦
  • Organizer: 第六回日本熱電学会学術講演会(TSJ2009)
  • Place of Presentation: 東北大学青葉山キャンパス、仙台市
• [Presentation] Thermoelectric Properties of Chevrel Phases M2Mo6S8 (M: Cu, Ni) (2009)
  • Author(s): Michihiro OHTA, Haruhiko OBARA
  • Organizer: 28th International Conference on Thermoelectrics and 7th European Conference on Thermoelectrics
  • Place of Presentation: フライブルク, ドイツ
• [Presentation] 銅シェブレル相硫化物の熱電特性 (2009)
  • Author(s): 太田道広、小原春彦
  • Organizer: 日本金属学会2009年春期(第144回)大会
  • Place of Presentation: 東京工業大学大岡山キャンパス、目黒区
• [Presentation] 銅シェブレル相硫化物の熱電特性 (2009)
  • Author(s): 太田道広
  • Organizer: 日本金属学会2009年春期(第144回)大会
  • Place of Presentation: 東京工業大学大岡山キャンパス
• [Presentation] CS2ガス硫化法によるLnGd1+xS3(Ln: La, Ce, Nd, Sm)の作製と熱電特性 (2008)
  • Author(s): 太田道広、平井伸治
  • Organizer: 日本金属学会2008年秋期(第143回)大会
  • Place of Presentation: 熊本大学黒髪キャンパス、熊本市
• [Presentation] Gdを自己ドープしたLnGdS3(Ln: La-Sm)の熱電特性 (2008)
  • Author(s): 太田道広、平井伸治
  • Organizer: 第五回日本熱電学会学術講演会(TSJ2008)
  • Place of Presentation: 早稲田大学大久保キャンパス、新宿区
• [Presentation] Thermoelectric Properties of LnGd1+xS3 (Ln: La, Ce, Nd, Sm) Prepared by CS2 Sulfurization (2008)
  • Author(s): Michihiro OHTA, Shinji HIRAI
  • Organizer: 27th International Conference on Thermoelectrics
  • Place of Presentation: オレゴン, 米国
• [Presentation] Thermoelectric Properties of LnGd_<1+X>S_3 (Ln : La, Ce, Nd, Sm) Prepared by CS_2 Sulfurization (2008)
  • Author(s): 太田道広
  • Organizer: 27th International Conference on Thermoelectrics
  • Place of Presentation: オレゴン州立大学
• [Presentation] Gdを自己ドープしたLnGdS3(Ln : La-Sm)の熱電特性 (2008)
  • Author(s): 太田道広
  • Organizer: 第5回日本熱電学会学術講演会(TSJ2008)
  • Place of Presentation: 早稲田大学大久保キャンパス
• [Presentation] CS_2ガス硫化法によるLnGd_<1+X>S_3(Ln : La, Ce, Nd, Sm)の作製と熱電特性 (2008)
  • Author(s): 太田道広
  • Organizer: 日本金属学会2008年秋期(第143回)大会
  • Place of Presentation: 熊本大学黒髪キャンパス