无机材料学报

• 研究论文 • 上一篇    下一篇

柠檬酸-硝酸盐燃烧法制备Ba0.5Sr0.5TiO3介电材料

沈彩; 刘庆峰; 刘茜   

  1. 中国科学院上海硅酸盐所高性能陶瓷和超微结构国家重点实验室 上海 200050
  • 收稿日期:2003-04-07 修回日期:2003-06-19 出版日期:2004-05-20 网络出版日期:2004-05-20

Ba0.5Sr0.5TiO3 Dielectric Materials Prepared by Citrate-nitrate Combustion

SHEN Cai; LIU Qing-Feng; LIU Qian   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2003-04-07 Revised:2003-06-19 Published:2004-05-20 Online:2004-05-20

摘要: 以硝酸钡、硝酸锶,钛酸四丁脂以及氨水为原料,利用柠檬酸-硝酸盐燃烧法制备了Ba0.5Sr0.5TiO3(BST)超细粉末。详细研究了pH值、分散剂对形成BST粉末粒度的影响.用所合成的粉末压片,1300℃烧结2h即可获得致密烧结体,烧结样品的平均粒径约为1μm.在10kHz,25℃下的介电性能为:介电常数1470,介电损耗0.006。

关键词: 钛酸锶钡, 柠檬酸-硝酸盐燃烧法, 介电性质

Abstract: Ultra-fine Ba0.5Sr0.5TiO3 (BST) powder was prepared by using barium nitrate, strontium nitrate, tetra-n-butyl titanate, and ammonium hydroxide
via citrate-nitrate combustion process. The pH value and dispersant, strongly influencing on the particle distribution of BST
powder, were investigated in detail. The precursor powders were pressed into tablets(φ=20.0mm, d=5.0 mm)and then fully sintered at
1300℃ for 2h.At 25℃, the dielectric constant and dissipation factor of the sintered sample were 1470 and 0.006 at 10kHz,
respectively, measured by a HP4192A Impedance.

Key words: (Ba, Sr)TiO3, citrate-nitrate combustion, dielectric property

中图分类号: