Evolution of crystallographic phases in the system (Pb1-xCax)TiO3:: A Rietveld study

被引：40

作者：

Chandra, A ^{[1
]}

Pandey, D ^{[1
]}

机构：

[1] Banaras Hindu Univ, Sch Mat Sci & Technol, Inst Technol, Varanasi 221005, Uttar Pradesh, India

来源：

JOURNAL OF MATERIALS RESEARCH | 2003年 / 18卷 / 02期

关键词：

D O I：

10.1557/JMR.2003.0052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

X-ray powder diffraction studies on (Pb1-xCax)TiO3 ceramic powders revealed the presence of superlattice reflections due to antiphase and inphase tilts of oxygen octahedra for x greater than or equal to 0.421. Rietveld analysis of the powder x-ray diffraction data confirmed that the structure of (Pb1-xCax)TiO3 is orthorhombic with Pbnm space group and a(-)a(-)c(+) tilt system for x greater than or equal to 0.421. For compositions with 0 < x less than or equal to 0.416, the structure was tetragonal, and the tetragonality decreased with increasing Ca2+ content.

引用

页码：407 / 414

页数：8

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