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2010 Fiscal Year Annual Research Report

IV族系化合物半導体の結晶構造改変による新機能創出と熱電変換素子への応用

Research Project

Project/Area Number 22560294
Research InstitutionShizuoka University

Principal Investigator

立岡 浩一  静岡大学, 工学部, 教授 (40197380)

Keywordsシリサイド / 熱電素子 / 結晶成長 / 自然エネルギー / ナノ構造制御 / 酸化 / メカニカルアロイング / 焼結体
Research Abstract

(1) 元素置換反応法によるp型Ca-Si系化合物の作製:Ca雰囲気中でMg2Siを熱処理する事によりCa2Siを作製した.本方法により作製するCaシリサイドは平衡相の三斜晶系であり、p型でゼーベック係数が大きい(~300μV/K)が高抵抗であるという問題がある.高抵抗の原因としては反応中の原料の酸化が考えられる.高真空が得られる真空装置を作製し原料の酸化を防いだ.生成されるCa-Si系化合物の成長温度依存性を調べ,単相Ca2Siの得られる作製条件を得た.原料としてMg2Si及びCaを用いた場合,概ね基板温度650度以下にて単相Ca2Siが得られた.また室温にて0.1S/cmの導電率を有するCa2Siが得られた.導電率の活性化エネルギーは0.13eVであり,計算で得られたCa2Siのバンドギャップ(0.3eV)と矛盾しない.(2)メカニカルアロイング法によりp型Ca-Si系化合物の作製と評価:本方法により作製するCaシリサイドは比較的低い抵抗(~0.1Ωcm)を示す.このCaシリサイドはCa-Si系の状態図にない立法晶系を示す.リードベルク解析により,格子定数0.5266A,空間群Fm-3m(#225)を有し,組成比が凡そCal3Si3の化合物となった.メカニカルアロイングという非平衡環境での化合物生成により,準安定状態である立法晶相が生成されたものと考えられる.ここで焼結プロセスについてはスパークプラズマシンタリング(SPS)法を用いた.SPS法による焼結の際にも概ね400度程度の処理温度におさえる必要がある事が分かった.

  • Research Products

    (29 results)

All 2011 2010 Other

All Journal Article (13 results) (of which Peer Reviewed: 13 results) Presentation (15 results) Remarks (1 results)

  • [Journal Article] Phase Selection during Calcium Silicide Formation for Layered and Powder Growth2011

    • Author(s)
      C.Wen, A.Kato, T.Nonomura, H.Tatsuoka
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 509 Pages: 4583-4587

    • Peer Reviewed
  • [Journal Article] Preparation and electrical properties of Mn silicides by reaction of MnC12 and Si powder2011

    • Author(s)
      J.Hu, C.Zhang, W.Li, S.Guan, H.Tatsuoka
    • Journal Title

      Physics Procedia

      Volume: 11 Pages: 138-141

    • Peer Reviewed
  • [Journal Article] Sr2SiO4 flower-like nanostructures grown by thermal oxidation of SrSi2 with Ga droplets2011

    • Author(s)
      Q.Yang, M.Tanaka, S.Liang, H.Tatsuoka
    • Journal Title

      Physics Procedia

      Volume: 11 Pages: l14-117

    • Peer Reviewed
  • [Journal Article] Thermoelectric properties of group VI metal silicide semiconductors2011

    • Author(s)
      T.Nonomura, C.Wen, A.Kato, K.Isobe, H.Tatsuoka
    • Journal Title

      Physics Procedia

      Volume: 11 Pages: 110-113

    • Peer Reviewed
  • [Journal Article] Electrical Properties of Ca2Si Sintered Compact Synthesized by Spark Plasma Sintering2011

    • Author(s)
      C.Wen, T.Nonomura, A.Kato, Y.Kenichi, H.Tatsuoka
    • Journal Title

      Physics Procedia

      Volume: 11 Pages: 106-109

    • Peer Reviewed
  • [Journal Article] Syntheses of single-phase polycrystalline Ca2Si powder and sintered compacts2011

    • Author(s)
      C.Wen, T.Nonomura, Y.Warathina, Y.Kubota, H.Tatsuoka
    • Journal Title

      International Journal of Materials Research

    • Peer Reviewed
  • [Journal Article] Growth of Sil-xGex bulk crystals with highly homogeneous composition for thermoelectric applications2011

    • Author(s)
      M.Arivanandhan, Y.Saito, H.Tatsuoka, Y.Hayakawa
    • Journal Title

      J.Cryst.Growth

    • Peer Reviewed
  • [Journal Article] HRTEM observation of defect structures of b-Ga203 nanowires2010

    • Author(s)
      Q.Yang, T.Yasuda, P.D.Brown, M.Tanaka, H.Tatsuoka
    • Journal Title

      physica status solidi (a)

      Volume: 207 Pages: 2467-2471

    • Peer Reviewed
  • [Journal Article] Optical and Electronic Properties of M2Si (M=Mg, Ca and Sr) Grown by Reactive Deposition Techniques2010

    • Author(s)
      J.Hu, A.Kato, T.Sadoh, Y.Maeda, K.N.Galkin, H.Tatsuoka
    • Journal Title

      International Journal of Modern Physics B

      Volume: 24 Pages: 3693-3699

    • Peer Reviewed
  • [Journal Article] Novel ultraviolet photoluminescence of ZnO/ZnGa2O4 composites2010

    • Author(s)
      Q.Yang, Y.Saeki, S.Izumi, A.Tackeuchi, H.Tatsuoka
    • Journal Title

      Applied Surface Science

      Volume: 256 Pages: 6928-6931

    • Peer Reviewed
  • [Journal Article] The Effects of Gallium Droplets on the Morphologies and Structures of a-Fe203 Nanostructures Grown on Iron Substrates2010

    • Author(s)
      Qing Yang, Hitonori Kukino, Hirokazu Tatsuoka
    • Journal Title

      Journal of Nanoscience and Nanotechnology

      Volume: 10 Pages: 7795-7799

    • Peer Reviewed
  • [Journal Article] Ab-initio Calculations for Defect Energies in Co2MnSi and Co2CrAl2010

    • Author(s)
      T.Hoshino, N.Fujima, M.Asato, H.Tatsuoka
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 504S Pages: S531-S533

    • Peer Reviewed
  • [Journal Article] Syntheses and Electrical Properties of Hexagonal Phase Group VI Meta1 Silicide Powders, Sintered Compacts and Bulk Crystals

    • Author(s)
      T.Nonomura, C.Wen, K.Shirai, H.Tatsuoka
    • Journal Title

      IOP Conference Series : Materials Science and Engineering

      Pages: 2011

    • Peer Reviewed
  • [Presentation] Syntheses and Electrical Properties of Hexagonal Phase Group VI Meta1 Silicide Powders, Sintered Compacts and Bulk Crystals2010

    • Author(s)
      T.Nonomura, C.Wen, K.Shirai, K.Isobe, A.Kato, H.Tatsuoka
    • Organizer
      3rd International Congress on Ceramics, Nov.14-18, 2010/Osaka, Japan, Symposium 9C
    • Place of Presentation
      Osaka International Convention Center
    • Year and Date
      2010-11-16
  • [Presentation] Effect of Na Addition on Electric Properties of Ca2Si Sintered Compacts2010

    • Author(s)
      C.Wen, T.Nonomura, K.Isobe, Y.Kubota, H.Tatsuoka
    • Organizer
      3rd International Congress on Ceramics, Nov.14-18, 2010/Osaka, Japan, Symposium 9C
    • Place of Presentation
      Osaka International Convention Center
    • Year and Date
      2010-11-16
  • [Presentation] Cu基板上への酸化銅ナノワイヤの作製と構造評価2010

    • Author(s)
      藤井宏道, 楊卿, 吉武亨将, 露無慎二, 立岡浩一
    • Organizer
      応用物理学会東海支部第17回基礎セミナーポスターセッション
    • Place of Presentation
      静岡大学工学部
    • Year and Date
      2010-10-20
  • [Presentation] 溶融塩法によるMoSi2及びWSi2膜の成長2010

    • Author(s)
      野々村知美, Cuillian Wen, 磯部賢二, 加藤彰彦, 立岡浩一
    • Organizer
      応用物理学会東海支部 第17回基礎セミナーポスターセッション
    • Place of Presentation
      静岡大学工学部
    • Year and Date
      2010-10-20
  • [Presentation] NaSiの電子状態と大気中における構造安定性2010

    • Author(s)
      白井憲吾, 下村勝, 立岡浩一
    • Organizer
      応用物理学会東海支部第17回基礎セミナーポスターセッション
    • Place of Presentation
      静岡大学工学部
    • Year and Date
      2010-10-20
  • [Presentation] Syntheses of vertically oriented oxide nanowires by thermal oxidation2010

    • Author(s)
      Zenmei Sai, Hiromichi Fujii, Qing Yang, Hirokazu Tatsuoka
    • Organizer
      応用物理学会東海支部第17回基礎セミナーポスターセッション
    • Place of Presentation
      静岡大学工学部
    • Year and Date
      2010-10-20
  • [Presentation] Effect of Na-based Compounds Addition on Ca Silicide Synthesis by Spark Plasma Sintering2010

    • Author(s)
      C.Wen, T.Nonomura, A.Kato, Y.Kubota, H.Tatsuoka
    • Organizer
      応用物理学会東海支部第17回基礎セミナーポスターセッション
    • Place of Presentation
      静岡大学工学部
    • Year and Date
      2010-10-20
  • [Presentation] Preparation and Electrical Properties of MnSi1.7 Powder by Reaction of MnC1 and Si Powder2010

    • Author(s)
      J.Hu, W.Li, S.Guan, 1H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicide
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-25
  • [Presentation] Synthesis and characterization of sodium monosilicide2010

    • Author(s)
      K.Shirai, T.Yamada, H.Morito H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicides
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-25
  • [Presentation] Thermoelectric properties of group VI metal silicide semiconductors2010

    • Author(s)
      T.Nonomura, C.Wen, M.Yamashita, K.Isobe, H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicide
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-25
  • [Presentation] Electrical properties of Ca2Si sintered compact synthesized by Spark Plasma Sintering.2010

    • Author(s)
      C.Wen, T.Nonomura, Y.Warashina, A.Kato, H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicide
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-25
  • [Presentation] Effect of Cu, Co Addition on β-FeSi2 Growth by Molten Salt Method2010

    • Author(s)
      M.Yamashita, C.Wen, T.Nonomura, H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicide
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-24
  • [Presentation] Sr2SiO4 Flower-like Nanostructures Grown by Thermal Oxidation of SrSi2 with Ga Droplets2010

    • Author(s)
      Q.Yang, T.Yasuda, K.Ogino, M.Tanaka, H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicide
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-24
  • [Presentation] Simple Synthesis of Zr02/SiOx Core/Shell Nanofibers Using ZrSi2 with Gallium2010

    • Author(s)
      Q.Yang, H.Kukino, M.Tanaka, A.Ishida, H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicide
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-07-24
  • [Presentation] Growth of Homogeneous Mg2Sil-xGex Crystals for Thermoelectric Application2010

    • Author(s)
      Y.Hayakawa, M.Arivanandhan, Y.Saito, H.Tatsuoka
    • Organizer
      Asia-Pacific Conference on Semiconducting Silicides
    • Place of Presentation
      EPOCAL Tsukuba
    • Year and Date
      2010-02-26
  • [Remarks]

    • URL

      http://www.ipc.shizuoka.ac.jp/~tehtats/

URL: 

Published: 2012-07-19  

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