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中文摘要：
采用微波烧结法和常规烧结法制备0.92MgAl2O4-0.08（Ca0.8Sr0.2）TiO3微波介质陶瓷,研究了两种烧结方式对陶瓷烧结性能、微观结构、相组成和介电性能的影响。结果表明：与传统烧结方式相比,微波烧结0.92Mg Al2O4-0.08（Ca0.8Sr0.2）TiO3陶瓷缩短了烧结周期,其物相组成无变化,微波烧结后的样品致密度高,晶粒细小,分布均匀,介电性能更加优异。在1 440℃下采用微波烧结20 min制备的0.92MgAl2O4-0.08（Ca0.8Sr0.2）TiO3陶瓷获得最佳的介电性能,εr=11.20,Q×f=56 217 GHz,τf=–3.4×10–6/℃。
英文摘要：
0.92MgAl2O4-0.08（Ca0.sSr0.2）TiO3 ceramics were prepared by microwave sintering and conventional sintering, respectively. The effects of two kinds of sintering methods on the sintering behaviottr, microstructure, phase composition and microwave dielectric properties of ceramics were investigated. The results show that the sintering time of ceramics is greatly shortened and the phase is not changed by microwave sintering. Furthermore, the microwave sintering samples exhibite higher densification, more uniform grain distribution and better dielectric properties. As a result, the optimal dielectric properties： εr=11.20, Q×f= 56 217 GHz, rf=-3.4×10-6/℃ were obtained for 0.92MgAl2O4-0.08（Ca0.8Sr0.2）TiO3 ceramics by microwave sintered at 1 440 ℃ for 20 min.
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