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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

低温烧结(Zr0.8Sn0.2)TiO4陶瓷的晶相组成与微波介电性能

王依琳; 赵梅瑜; 吴文骏; 李蔚   

  1. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2004-04-08 修回日期:2004-06-11 出版日期:2005-05-20 网络出版日期:2005-05-20

Phase Composition and Microwave Dielectric Properties of Low Firing (Zn0.8Sn0.2)TiO4 Ceramics

WANG Yi-Lin; ZHAO Mei-Yu; WU Wen-Jun; LI Wei   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2004-04-08 Revised:2004-06-11 Published:2005-05-20 Online:2005-05-20

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摘要： 讨论了低温烧结(Zr0.8Sn0.2)TiO4微波介质陶瓷的晶相组成与制备工艺、掺杂离子的关系,结果表明:粉体的合成温度对烧结体的晶相构成有很大的影响,进而影响材料的谐振频率温度系数竹,稍高的合成温度有利于提高α-PbO型ZST相的稳定性,使谐振频率温度系数τf由107 ppm/℃降至20.88 ppm/℃.采用Nb5+离子掺杂能更有效地抑制烧结过程中游离氧化物相的析出,当Nb5+达到0.15mol%时,920℃烧结样品的介电常数为25,谐振频率温度系数τf为-2.44 ppm/℃,品质因数Q·f达4868GHz(5GHz).

关键词: 低温烧结, 晶相组成, 微波介质

Abstract: The effects of the preparing process and the doping ions on the phase composition of low firing (Zn0.8Sn0.2)TiO4
ceramics were studied. The experimental results indicatethat the phase composition of the ceramics is dependent on the calcining
temperature of ZST powder, and it will affect τf, the temperature coefficient of resonant frequencies. Higher calcining
temperature for the powders is favorable to increase the stability of α-PbO type ZST phase for decreasing the temperature coefficient.
It is more useful to restrain the separation of oxides by doping with Nb5+. Dielectric constant ε, temperature coefficient τf
and Q·f of the samples doped with 0.15mol% Nb5+ sintered at 920℃ are 25, --2.44 ppm/℃ and 4868(5GHz).

Key words: low firing, phase composition, microwave dielectrics

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