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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

银掺杂对Bi2O3-ZnO-Nb2O5系陶瓷介电及熔融物性的影响

魏建中1,2; 陈忍昌1; 张良莹3; 姚喜3   

  1. 1. 香港城市大学电子工程系EPA中心; 2. 中国电子产品可靠性与环境试验研究所, 广州 510610; 3. 西安交通大学电子材料研究所, 西安 710049
  • 收稿日期:2000-04-04 修回日期:2000-06-09 出版日期:2001-03-20 网络出版日期:2001-03-20

Effects of Ag-Dopant on Dielectric Properties and Melting Behaviors of Bi2O3-ZnO-Nb2O5 (BZN)-Based Ceramics

WEI Jian-Zhong1; 2; CHEN Ren-Chang1; ZHANG Liang-Ying3; YAO Xi3   

  1. 1. EPA Center of Electronic Engineering Department; City University of Hongkong; China; 2. China Electronic Product Reliability and Environment Testing Research Institute; Guangzhou 510610; China; 3. Electronic Materials Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2000-04-04 Revised:2000-06-09 Published:2001-03-20 Online:2001-03-20

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摘要： 在ＢＺＮ系陶瓷中，立方焦绿石结构的α相与低对称结构的β相是二个重要的基本物相，α相是熔点为１１９０℃的同成分熔融化合物，对应负温度系数，β相是转熔温度为１１００℃的异成分熔融化合物，对应正温度系数，α相与β相接一定比例组成（α＋β）复相瓷料，得到ＣＨ组零温度系数．分别在α相、β相以及ＣＨ组复相瓷料中进行银掺杂，通过瓷料介电性能的研究，首次明确了银掺杂对α相、β相以及ＣＨ组复相瓷料介电性能的不同影响和影响程度，进一步研究银掺杂β相瓷料的熔融物性，结果表明银掺杂对瓷料熔融物性的影响是影响其介电性能的内因．

关键词: 银掺杂, 焦绿石结构, 介电性能, 熔融物性

Abstract: Cubic pyrochlore structure α phase and low symmetry structure β phase are the basic
phases of BZN-based ceramics. The α phase is a congruent compound, its congruent melting point is 1190℃, corresponding to negative
temperature coefficient of dielectric constant. The β phase is an incongruent compound, its incongruent melting point (peritectic temperature)
is 1100℃, corresponding to positive temperature coefficient. The zero temperature coefficient of CH grade would be met with fixed
α/β phase ratio. In this paper, dielectric properties of Ag-doped BZN-based α phase, β phase and CH grade diphasic ceramics were explored respectively. The results show the effects of Ag-dopant on the dielectric properties of BZN-based α phase,
β phase and CH grade diphasic ceramics. The melting behaviors of Ag-doped BZN-based β phase were explored too. The change of
incongruent melting point results in the change of the dielectric property of Ag-doped BZN-based ceramics.

Key words: Ag-dopant, pyrochlore structure, dielectric properties, melting behaviors

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