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氧化硼掺杂钛酸锶钡梯度陶瓷致密化及介电性

程华容1, 朱景川1, 全在昊2, 尹钟大1   

  1. 1. 哈尔滨工业大学材料学院, 哈尔滨 150001; 2. 韩国机械研究院材料技术部, 昌原 641010
  • 收稿日期:2003-09-08 修回日期:2003-11-04 出版日期:2004-09-20 网络出版日期:2004-09-20

Densification and Dielectric Property of B2O3-doped Ba1-xSrxTiO3 Graded Ceramics

CHENG Hua-Rong1, ZHU Jing-Chuan1, JEON Jae-Ho2, YIN Zhong-Da1   

  • Received:2003-09-08 Revised:2003-11-04 Published:2004-09-20 Online:2004-09-20

摘要: 研究了氧化硼(B2O3)掺杂量及烧结温度对钛酸锶钡(Ba1-xSrxTiO3, x=0~0.4)致密化行为及其微观组织的影响, 确定了不同成分钛酸锶钡中氧化硼掺杂量. 随后, 采用一系列Ba1-xSrxTiO3掺杂粉体, 烧结制备了钛酸锶钡梯度陶瓷, 并测试了其介电性能. 结果表明, 钛酸锶钡掺杂适量氧化硼明显降低烧结温度, 在1300℃即可烧结致密化, 比未掺杂相同成分的钛酸锶钡陶瓷烧结温度至少降低100℃; 烧结后各成分单层陶瓷与梯度陶瓷介电性能随温度的变化表明, 梯度组成陶瓷的居里峰温度区间显著展宽, 大大降低了该温区的介温系数, 可望提高该系列陶瓷元器件精度及稳定性.

关键词: 钛酸锶钡, 掺杂, 梯度陶瓷, 介电性

Abstract: The effect of B2O3 dopant amount and sintering temperature on the densification behavior and
microstructure of Ba1-xSrxTiO3(x=0~0.4) was investigated, and different contents of B2O3 were selected for
the different composition of Ba1-xSrxTiO3. Then with a series of doped Ba1-xSrxTiO3 powders, graded pellet was fabricated and sintered,
and dielectric property was measured. The results show that, the sintering temperature of B2O3-doped Ba1-xSrxTiO3 is effectively
lowered at least 100℃ compared with that of undoped Ba1-xSrxTiO3, and at 1300℃ the ceramic is nearly full densified. After sintering, the Curie temperature zone of graded
ceramics is broadened remarkably, and the permittivity-temperature coefficient is greatly decreased, which means the accuracy and stability
of components made of such material can be improved.

Key words: Ba1-xSrxTiO3, doping, graded ceramics, dielectric property

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