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Structure and thermoelectric properties of Bi–Te alloys obtained by novel method of oxide substrates reduction
Abstract
A novel method of thermoelectric materials fabrication has been developed. Oxide reagents have been melted at high temperature in air, quenched, milled to powder and reduced in hydrogen to form Bi–Te alloys. Structural and thermoelectric properties of samples have been investigated depending on initial composition and temperature of reduction process. Sample 25Bi2O3–75TeO2 reduced at 340 °C for 10 h has been found to be a p-type conductor, whereas the other are n-type conductors. The highest figure of merit (ZT = 0.2) at near-room temperature shows the 20Bi2O3–80TeO2 compound reduced at 400 °C for 10 h. The suggested novel method of thermoelectric materials fabrication is cheap, easy and allows to control the composition and microstructure (size of grains, distribution etc.) in order to obtain both high electrical conductivity and relatively low thermal conductivity of final product.
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF ALLOYS AND COMPOUNDS
no. 646,
pages 1124 - 1132,
ISSN: 0925-8388 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Bochentyn B., Karczewski J., Miruszewski T., Kusz B.: Structure and thermoelectric properties of Bi–Te alloys obtained by novel method of oxide substrates reduction// JOURNAL OF ALLOYS AND COMPOUNDS. -Vol. 646, nr. 15 (2015), s.1124-1132
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2015.06.127
- Verified by:
- Gdańsk University of Technology
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