Chemical alloying and characterization of nanocrystalline bismuth telluride

被引：40

作者：

Toprak, M ^{[1
]}

Zhang, Y ^{[1
]}

Muhammed, M ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Chem Mat, SE-10044 Stockholm, Sweden

来源：

MATERIALS LETTERS | 2003年 / 57卷 / 24-25期

基金：

瑞典研究理事会;

关键词：

nanomaterials; powder technology; thermoelectric; Bi2Te3; coprecipitation; chemical alloying;

D O I：

10.1016/S0167-577X(03)00250-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel chemical alloying method has been developed for the fabrication of nanocrystalline thermoelectric alloy Bismuth telluride, Bi2Te3. The method consists of a combination of solution chemical method and thermal processing under controlled heating conditions. The components have been coprecipitated from a solution and the precursor consists of a solid solution of the different intermediate compounds and exhibits high reactivity. Calcination and hydrogen reduction of the precursor at moderate temperature, 350 degreesC, for 2 h resulted in the alloying of these elements to obtain the pure phase of the thermoelectric material in fine powder. The method is simpler than conventional melt processing and produced a 95-98% yield in laboratory scale. High concentration of grain boundaries provided by nanostructuring is expected to lower the thermal conductivity of thermoelectric material and further increase the performance. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：3976 / 3982

页数：7

共 10 条

[1]

GOLDSMID HJ, 1964, THERMOELECTRIC REFRI, P198

[2]

Mahan G. D., 1997, SOLID STATE PHYS, P81

[3] A NOVEL SYNTHESIS OF POLYCRYSTALLINE BISMUTH TELLURIDE [J].

RITTER, JJ .

INORGANIC CHEMISTRY, 1994, 33 (26) :6419-6420

[4] MATERIALS FOR THERMOELECTRIC REFRIGERATION [J].

ROSI, FD ;

ABELES, B ;

JENSEN, RV .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1959, 10 (2-3) :191-200

[5] EFFECT OF GRAIN-SIZE ON THE THERMOELECTRIC CONVERSION EFFICIENCY OF SEMICONDUCTOR ALLOYS AT HIGH-TEMPERATURE [J].

ROWE, DM ;

BHANDARI, CM .

APPLIED ENERGY, 1980, 6 (05) :347-351

[6]

Toprak M, 2000, NATO SCI S PRT 3 HI, V78, P149

[7]

TOPRAK M, 2000, P 18 INT C THERM, P382

[8] Synthesis and characterization of nano-engineered thermoelectric Skutterudite via solution chemistry route [J].

Wang, M ;

Zhang, Y ;

Muhammed, M .

NANOSTRUCTURED MATERIALS, 1999, 12 (1-4) :237-240

[9]

WANG M, 1999, THESIS ROYAL I TECHN

[10]

WEAST RC, 1981, CRC HDB CHEM PHYSICS

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