Rare earth chalcogenides for use as high temperature thermoelectric materials

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In the first part of the thesis, the electric resistivity, Seebeck coefficient, and Hall effect were measured in X{sub y}(Y{sub 2}S{sub 3}){sub 1-y} (X = Cu, B, or Al), for y = 0.05 (Cu, B) or 0.025-0.075 for Al, in order to determine their potential as high- temperature (HT)(300-1000 C) thermoelectrics. Results indicate that Cu, B, Al- doped Y{sub 2}S{sub 3} are not useful as HT thermoelectrics. In the second part, phase stability of {gamma}-cubic LaSe{sub 1.47-1.48} and NdSe{sub 1.47} was measured periodically during annealing at 800 or 1000 C for the same purpose. In the Nd selenide, {beta} phase ... continued below

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79 p.

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Michiels, J. January 2, 1996.

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  • Ames Laboratory
    Publisher Info: Ames Lab., IA (United States)
    Place of Publication: Iowa

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Description

In the first part of the thesis, the electric resistivity, Seebeck coefficient, and Hall effect were measured in X{sub y}(Y{sub 2}S{sub 3}){sub 1-y} (X = Cu, B, or Al), for y = 0.05 (Cu, B) or 0.025-0.075 for Al, in order to determine their potential as high- temperature (HT)(300-1000 C) thermoelectrics. Results indicate that Cu, B, Al- doped Y{sub 2}S{sub 3} are not useful as HT thermoelectrics. In the second part, phase stability of {gamma}-cubic LaSe{sub 1.47-1.48} and NdSe{sub 1.47} was measured periodically during annealing at 800 or 1000 C for the same purpose. In the Nd selenide, {beta} phase increased with time, while the Nd selenide showed no sign of this second phase. It is concluded that the La selenide is not promising for use as HT thermoelectric due to the {gamma}-to-{beta} transformation, whereas the Nd selenide is promising.

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79 p.

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OSTI as DE96006806

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE96006806
  • Report No.: IS-T--1751
  • Grant Number: W-7405-ENG-82
  • Office of Scientific & Technical Information Report Number: 206867
  • Archival Resource Key: ark:/67531/metadc668329

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Office of Scientific & Technical Information Technical Reports

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  • January 2, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 15, 2016, 12:27 p.m.

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Michiels, J. Rare earth chalcogenides for use as high temperature thermoelectric materials, thesis or dissertation, January 2, 1996; Iowa. (digital.library.unt.edu/ark:/67531/metadc668329/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.