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首页> 外文期刊>Materials Science and Engineering. B, Solid-State Materials for Advanced Technology >Microstructures and dielectric properties of CaTiO_3-LaSrAlO_4 composite ceramics
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Microstructures and dielectric properties of CaTiO_3-LaSrAlO_4 composite ceramics

机译：CaTiO_3-LaSrAlO_4复合陶瓷的微观结构和介电性能

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摘要

The microstructures and dielectric properties of xCaTiO_3/(1-x)LaSrAlO_4 composite ceramics were investigated. CaTiO_3 and LaSrAlO_4 could co-exist when the content of CaTiO_3 was no more than 30 mol percent, while LaAlO_3 and CaO phases were observed in the composite ceramics with higher CaTiO_3 content. The dielectric constant of the composite ceramics increased with increasing the additive content, and the dielectric loss generally increased with increasing the additive content because of the presence of phase boundary and the high dielectric loss of the minor phases. The temperature coefficient of dielectric constant decreased with increasing the additive content firstly, and then it increased abnormally when x equals to 40 mol percent, finally it decreased with increasing the additive content further. The dielectric properties predicted from serial formula were most close to those obtained from experiment among the classical dielectric mixture rules.
机译：研究了xCaTiO_3 /（1-x）LaSrAlO_4复合陶瓷的微观结构和介电性能。当CaTiO_3的含量不超过30 mol％时，CaTiO_3和LaSrAlO_4可以共存，而在CaTiO_3含量较高的复合陶瓷中观察到LaAlO_3和CaO相。复合陶瓷的介电常数随着添加剂含量的增加而增加，并且由于相界的存在和次要相的高介电损耗，介电损耗通常随添加剂含量的增加而增加。介电常数的温度系数首先随着添加剂含量的增加而降低，然后在x等于40 mol％时异常升高，最后随着添加剂含量的增加而降低。在经典的介电混合规则中，从系列公式预测的介电性能最接近于从实验获得的介电性能。

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