X-ray diffraction and Raman scattering study of Sr1-xBi2+yTa2O9 nanoparticles

被引：0

作者：

Zhou, Y ^{[1
]}

Ke, H ^{[1
]}

Jia, DC ^{[1
]}

Wang, W ^{[1
]}

Rao, JC ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5 | 2005年 / 475-479卷

关键词：

Sr1-xBi2+yTa2O9; nanoparticles; Raman scattering; size effects; damping;

D O I：

10.4028/www.scientific.net/MSF.475-479.3539

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sr1-xBi2+yTa2O9 (x, y=0.2, 0) nanoparticles, synthesized by a sol-gel method, are investigated by X-ray diffraction and Raman spectroscopy. Large structure distortion shows the size effects in nanoparticles, which gives rise to the Raman bands broadening. The Bi content is the most important factor responsible for non-stoichiometric SrBi2Ta2O9 structure distortion and providing the larger ferroelectric spontaneous polarization and the higher Curie temperature. The stability of the crystal structure is discussed in consideration of inner compressive stress in nanoparticles.

引用

页码：3539 / 3542

页数：4

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