Interdiffusion of Bi and Sb in Superlattices Built From Blocks of Bi2Te3, Sb2Te3 and TiTe2

被引：0

作者：

Mortensen, Clay D. ^{[1
]}

Johnson, David C. ^{[1
]}

机构：

[1] 1253 Univ Oregon, Dept Chem, Eugene, OR 97403 USA

来源：

MATERIALS AND DEVICES FOR THERMAL-TO-ELECTRIC ENERGY CONVERSION | 2009年 / 1166卷

基金：

美国国家科学基金会;

关键词：

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The reaction kinetics of [(Ti-Te)](x)[(Sb-Te)](y), [(Bi-Te)](x)[(Sb-Te)](y), [(Ti-Te)](w)[(Bi-Te)](x) and [(Ti-Te)](w)[(Bi-Te)](x)[(Ti-Te)](y)[(Sb-Te)](z) precursors as a function of annealing temperature and time was probed using x-ray diffraction techniques to define the parameters required to form superlattice structures. [(TiTe2)(1.36)](x)[Sb2Te3](y) and [(TiTe2)(1.36)](x)[Bi2Te3](y) superlattices were observed to form while [(Bi-Te)](x)[(Sb-Te)](y) precursors yielded only Bi2-xSbxTe3 alloys. This behavior was correlated with the miscibility/immiscibility of the constituents of the targeted superlattices. For the three component system, Bi and Sb were observed to interdiffuse through the Ti-Te layer over the range of Ti-Te thicknesses explored, resulting in formation of (BixSb1-x)(2)Te-3 alloys within the superlattice structure. When the Bi2Te3 and Sb2Te3 thicknesses were equal, symmetric [{(TiTe2)}(1.36)](w)[(Bi0.5Sb0.5)(2)Te-3](y) superlattices were formed.

引用

页码：43 / 51

页数：9

共 15 条

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