Phase structure, sintering behavior and adjustable microwave dielectric properties of Mg1-xLi2xTixO1+2x solid solution ceramics
Phase structure, sintering behavior and adjustable microwave dielectric properties of Mg1-xLi2xTixO1+2x solid solution ceramics
复制标题
Mg1-xLi2xTixO1 2x固溶体陶瓷的相结构、烧结行为和可调微波介电性能
DOI：
10.1016/j.jallcom.2016.12.114
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发表时间：
2017
影响因子：
6.2
通讯作者：
Chen Xiuli
中科院分区：
文献类型：
--
作者：
Zhou Huanfu;Tan Xianghu;Huang Jin;Wang Nan;Fan Guangchao;Chen Xiuli
采用固相反应法制备了−xLi2xTixO1+2x(1/5≤x≤+1/2)固溶体陶瓷。研究了陶瓷的烧结行为、显微结构和微波介电性能。X-射线衍射图表明，氧化镁和钛酸锂形成了具有岩盐结构的固溶体：−_1Li2xTixO1+2x。随着x值的增大，陶瓷的晶胞参数减小，Q×f值和体积密度都是先增大后增大，达到最大值后减小。最重要的是，陶瓷的微波介电性能的热稳定性得到了提高。当HeNx=1/4时，Li2Mg3TiO6陶瓷具有良好的微波介电性能，Q×f=1110,703 GHz，εr=913.6，τf=−35.1ppm/°C。
Mg1−xLi2xTixO1+2x(1/5 ≤x≤ 1/2) solid solution ceramics were prepared by the solid state reaction method. The sintering behavior, microstructure and microwave dielectric properties of ceramics were investigated. X-ray diffraction patterns showed that MgO and Li2TiO3could form Mg1−xLi2xTixO1+2xsolid solutions with a rock salt structure. With increasingxvalues, the unit cell parameters of ceramics decreased, both theQ×fvalue and bulk density increased firstly, reached the max value and then decreased. Most importantly, the thermal stability of microwave dielectric properties for ceramics was improved. Whenx= 1/4, Li2Mg3TiO6ceramics exhibited good microwave dielectric properties withQ×f= 110,703 GHz,εr= 13.6 andτf= −35.1 ppm/°C.