Structure and negative thermal expansion of Pb1-xBixTiO3

被引：18

作者：

Hu, Penghao ^{[1
]}

Cao, Zhanmin ^{[1
]}

Chen, Jun ^{[1
]}

Deng, Jinxia ^{[1
]}

Sun, Ce ^{[1
]}

Yu, Ranbo ^{[1
]}

Xing, Xianran ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 30期

基金：

中国国家自然科学基金;

关键词：

Pb1-xBixTiO3; Perovskites; Negative thermal expansion (NTE); Spontaneous polarization (P-s); X-ray techniques;

D O I：

10.1016/j.matlet.2008.08.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pb1-xBixTiO3 (x=0.0-0.1) compounds were prepared to study the unique clopant effect of bismuth in PbTiO3. Their thermal expansions and structures were investigated by high-temperature X-ray diffraction and X-ray Rietveld method. The results indicated that Bismuth substitution evidently weakened the tetragonality of PbTiO3 solid solution, but increased the spontaneous polarization. Both the enhanced spontaneous polarization and the decreased tetragonality led to small volume shrinkage with temperature rising, where the average volumetric thermal expansion coefficient changed from -1.99 x 10(-5)/degrees C for pure PbTiO3 to -0.56x 10(-5)/degrees C for Pb0.90Bi0.10TiO3. The Curie point of Pb1-xBixTiO3 was slightly raised compared to PbTiO3 and permitted one to use it in a wide temperature range. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：4585 / 4587

页数：3

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