Large-scale synthesis of Pb1-xLaxTiO3 ceramic powders by molten salt method

被引：24

作者：

Cai, Zongying

Xing, Xianran

Yu, Ranbo

Liu, Guirong

Xing, Qifeng

机构：

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

[2] Inst Ordnance Engn, Shijiazhuang 050003, Hebei, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 420卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

molten salt synthesis (MMS); PbxLa1-xTiO3; morphology;

D O I：

10.1016/j.jallcom.2005.10.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ferroelectric perovskite type lanthanurn doped lead titanate (PLT) ceramic powders were synthesized in one step with the starting materials of PbC2O4, La2O3 and TiO2 in NaCl-KCl molten salts in the temperature range of 700-950 degrees C. It was found that molten salt method was a large scale and easy preparation way to produce PLT powders with high dispersity. Tetragonal phase Pb1-xLaTiO3 ceramic powders were identified by XRD in the composition range 0 <= x <= 0.3 and mono-dispersed particles with spheric shape and less than 100 nm size were observed by SEM. The grain sizes of Ph1-xLaxTiO3 ceramic powders increased with the increase of La content and decreased with calcination temperature. The grain growth progress and the possible reaction mechanism in molten salts and its influencing factors were discussed in this work. The grain growth process was the main influencing factor of the grain size, which depended on the solubility in the flux. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：273 / 277

页数：5