Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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$Bi_2Te_3-PbTe$계 열전소재의 자연나노구조체 형성 및 특성

  • 임주혁 (한국과학기술연구원 재료연구본부 박막재료연구센터) ;
  • 정규호 (한국과학기술연구원 재료연구본부 박막재료연구센터) ;
  • 김광천 (한국과학기술연구원 재료연구본부 박막재료연구센터) ;
  • 유현우 (한국과학기술연구원 재료연구본부 박막재료연구센터) ;
  • 김진상 (한국과학기술연구원 재료연구본부 박막재료연구센터)
  • Published : 2009.11.12
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Abstract

The microtstructures and properties of alloys in the pseudo-binary $Bi_2Te_3-PbTe$ system were investigated as a first step towards the design of nanostructured materials with enhanced thermoelectric properties. The liquid alloys were cooled by water quenching method. Dendritic and lamellar structures were observed clearly by using environmental scanning electron microscope(eSEM) and electron probe micro analyzer(EPMA) take into account composition ratio between $Bi_2Te_3$ and PbTe. The compound $Pb_2Bi_6Te_{11}$ precipitated as a metastable phase under all conditions. The structure of those samples changed from dendritic to lamellar by increasing $Bi_2Te_3$ ratio of composition.

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