Preparation of (Pb,Ba)TiO3 powders and highly oriented thin films by a sol-gel process

被引：25

作者：

Boland, SW ^{[1
]}

Pillai, SC ^{[1
]}

Yang, WD ^{[1
]}

Haile, SM ^{[1
]}

机构：

[1] CALTECH, Dept Mat Sci, Pasadena, CA 91125 USA

来源：

JOURNAL OF MATERIALS RESEARCH | 2004年 / 19卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1557/JMR.2004.0199

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Solid solution Pb1-xBaxTiO3, with particular emphasis on Pb0.5Ba0.5TiO3, was prepared using a sol-gel process incorporating lead acetate trihydrate, barium acetate, and titanium isopropoxide as precursors, acetylacetone (2,4 pentanedione) as a chelating agent, and ethylene glycol as a solvent. The synthesis procedure was optimized by systematically varying acetylacetone: Ti and H2O:Ti molar ratios and calcination temperature. The resulting effects on sol and powder properties were studied using thermogravimetric analysis/differential scanning calorimetry, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, and x-ray diffraction (XRD). Crystallization of the perovskite structure occurred at a temperature as low as 450 degreesC. Thin films were prepared by spin coating on (100) MgO. Pyrolysis temperature and heating rate were varied, and the resultant film properties investigated using field-emission scanning electron microscopy, atomic force microscopy, and XRD. Under optimized conditions, highly oriented films were obtained at a crystallization temperature of 600 degreesC.

引用

页码：1492 / 1498

页数：7

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