Improved Thermoelectric Properties in Structure Controlled Ag-Sb-Te System

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The <i>p</i>-type Ag<sub>0.208</sub>Sb<sub>0.275</sub>Te<sub>0.517</sub> boule was unidirectionally grown using a Bridgman furnace and, it was subsequently cooled rapidly by an Ar flush to form a high temperature phase AgSbTe2, which could be desirable for power generation. Though the boule looked a homogeneous Widmannstätten structure of the AgSbTe<sub>2</sub> phase, XRD patterns revealed that some precipitates of Ag<sub>2</sub>Te and Sb<sub>2</sub>Te<sub>3</sub> were contained in the boule and increased in volume in the growth direction. The relationship between the transformation and the thermoelectric properties was investigated. Figure-of-merit <i>Z</i> of the <i>p</i>-type Ag<sub>0.208</sub>Sb<sub>0.275</sub>Te<sub>0.517</sub> boule has been evaluated in the temperature range from 300 to 700 K. The maximum figure-of-merit <i>Z</i><sub>max</sub> was different in the portions of the boule. The value of 2.0×10<sub>-3</sub> /K was for the former half portion of the boule at 620 K and that of 1.7×10<sub>-3</sub> /K was for the latter half portion at 585 K . The Ag<sub>0.208</sub>Sb<sub>0.275</sub>Te<sub>0.517</sub> boule with less precipitates showed a higher <i>Z</i> at higher temperatures. Possibility of improving thermoelectric properties in Ag-Sb-Te system was pointed out.

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  • 電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society

    電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society 124(4), 312-316, 2004-04-01

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10012705896
  • NII書誌ID(NCID)
    AN10136312
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    03854205
  • NDL 記事登録ID
    6909303
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-793
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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