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钛取代锆对 (Ca0.45Sr0.55)ZrO3陶瓷介电性能的影响

DOI: 10.7521/j.issn.0454-5648.2014.07.01

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Abstract:

采用氧化物固相反应法制备了不同摩尔配比的(Ca0.45Sr0.55)(Zr1-xTix)O3介质陶瓷材料,研究了Ti取代Zr对(Ca0.45Sr0.55)(Zr1-xTix)O3晶相结构和介电性能的影响。结果表明(Ca0.45Sr0.55)ZrO3和(Ca0.45Sr0.55)TiO3在Ti的取代量x≤0.12的范围内完全固溶,无另相存在,Ti取代量对晶粒尺寸的影响不大;随着Ti取代量x的增大,(Ca0.45Sr0.55)(Zr1-xTix)O3陶瓷的相对介电常数(εr)线性地增大,介电常数温度系数(τε)线性地减小,通过调整x的值,可以得到接近于0的τε值;(Ca0.45Sr0.55)(Zr0.96Ti0.04)O3在1300℃烧结2h,1MHz下εr=35.5、tgδ<1×10-4、τε=3.1×10-6/℃,具有优良的温度、频率和电场稳定性,适合于小尺寸、温度热稳定型(NP0)多层片式陶瓷电容器的制备。

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