研究了A位Sr2+取代对(Ca1-xSrx)[(Li1/3Nb2/3)0.95Zr0.15]3+δ(0.0≤x≤0.2,CSLNZ)陶瓷的微观结构及微波介电特性的影响.当0≤x≤20%(摩尔分数)时,体系为单一钙钛矿相,随Sr2+含量的增加,介电常数和谐振频率温度系数增大,而品质因素先增大,x=0.05时,开始下降.用键价理论分析了谐振频率温度系数随B位键价的变化关系.当Sr2+含量为5%(摩尔分数)时,陶瓷微波介电性能最佳:εr=32.5,Qf=13500GHz,τf=-2.4×10-6/℃.
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