HYDROTHERMAL SYNTHESIS AND DIELECTRIC-PROPERTIES OF TETRAGONAL BATIO3

被引：193

作者：

DUTTA, PK ^{[1
]}

ASIAIE, R ^{[1
]}

AKBAR, SA ^{[1
]}

ZHU, WD ^{[1
]}

机构：

[1] OHIO STATE UNIV,DEPT MAT SCI & ENGN,COLUMBUS,OH 43210

来源：

CHEMISTRY OF MATERIALS | 1994年 / 6卷 / 09期

关键词：

D O I：

10.1021/cm00045a011

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：

Hydrothermal synthesis of barium titanate (BaTiO3) at 240-degrees-C using different barium salts as starting reactants is examined. It is found that halide salts (I-, Br-, Cl-) result in the highest tetragonal content, followed by acetate, nitrate, and hydroxide salts. The tetragonal content was quantified from differential scanning calorimetry by following the endothermic Curie transition around 130-degrees-C and reached as high as 37-39% for the materials made with the barium halides. The particle sizes ranged from 0.15 to 0.37 mum, as estimated by scanning electron microscopy. Sintering and dielectric properties of the barium titanates synthesized from different barium sources were examined. BaTiO3 made from the chloride salt sintered with high densities at 1250-degrees-C with grain sizes of 1-5 mum and a room-temperature dielectric constant (1 kHz) of 2960.

引用

页码：1542 / 1548

页数：7

共 56 条

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