Barium titanate ceramics prepared from conventional and microwave hydrothermal powders

被引：87
|
作者：
Liu, SF
Abothu, IR
Komarneni, S [1 ]
机构：
[1] Penn State Univ, Mat Res Lab, University Pk, PA 16802 USA
[2] Inst Mat Res & Engn, Singapore 119260, Singapore
来源：
MATERIALS LETTERS | 1999年 / 38卷 / 05期
关键词：
barium titanate; microwave-hydrothermal process; hydrothermal processing; relative permittivity; dissipation factor; electroceramic;
D O I：
10.1016/S0167-577X(98)00187-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microwave-hydrothermal (MH) synthesis of BaTiO3 was done at 138 degrees C with reaction time as low as 15 min, using Ba(NO3)(2), TiCl4 and KOH as starting chemicals. The resulting powder was pressed into pellets and sintered at different temperatures. BaTiO3 ceramics prepared by the above method resulted in a density of about 93% upon sintering at 1300 degrees C/2 h with larger grains and room temperature relative permittivity of 2000 at 1 kHz with a Curie temperature of 125 degrees C. The above properties were compared with samples of the same composition prepared by conventional hydrothermal (CH) method using the same starting solutions. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：344 / 350
页数：7
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