Synthesis and physical properties of negative thermal expansion materials Zr1-xMxW2O8-y (M = Sc, In, Y) substituted for Zr(IV) sites by M(III) ions

被引：49

作者：

Nakajima, N

Yamamura, Y

Tsuji, T

机构：

[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292, Japan

[2] Japan Adv Inst Sci & Technol, Ctr Nano Mat & Technol, Tatsunokuchi, Ishikawa 9231292, Japan

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 128卷 / 05期

关键词：

phase transitions; order-disorder effects; thermal expansion;

D O I：

10.1016/S0038-1098(03)00525-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Zr1-xMxW2O8-y, (M = Sc, In and Y) solid solutions substituted up to x = 0.04 for Zr(IV) sites by M(III) ions were synthesized by a solid-state reaction. X-ray diffraction experiments from 90 to 560 K revealed that all solid solutions had a cubic crystal structure and showed negative thermal expansion coefficients. The lattice parameters of Zr1-xMxW2O8-y were smaller than that of ZrW2O8 probably due to oxygen defects, though the ionic radii of substituted M3+ ions were larger than that of Zr4+. Order-disorder phase transition temperatures of the substituted samples drastically decreased in the order of Y, In and Sc compared to the percolation theory, and decreased with increasing M content. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：193 / 196

页数：4

共 14 条

[1]

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