A novel temperature-stable and low-loss microwave dielectric using Ca0.8Sr0.2TiO3- modified Li2Mg3TiO6 ceramics

作者：Xie, Tianyi; Zhang, Liangzhu^*; Ren, Haisen; Dang, Mingzhao; Wang, Huijuan; Jiang, Shaohu; Zhao, Xiangyu; Meng, Fancheng; Lin, Huixing; Luo, Lan

来源：Journal of Materials Science: Materials in Electronics , 2017, 28(18): 13705-13709.

DOI：10.1007/s10854-017-7214-x

Microstructure and microwave dielectric properties of (1-x)Li2Mg3TiO6-xCa(0.8)Sr(0.2)TiO(3) (x = 0.03, 0.06, 0.08, 0.09, 0.12) ceramics prepared by the conventional solid state route have been investigated. XRD and SEM-EDS analysis confirmed that ceramics contain Li2Mg3TiO6 and Ca0.8Sr0.2TiO3 phases. The microwave properties exhibited a significant dependence on the sintering temperature and Ca0.8Sr0.2TiO3 content. With increasing addition of Ca0.8Sr0.2TiO3, the dielectric constant increased from 14.3 to 17.4 when samples sintered at 1410 A degrees C for 4 h; the quality factor (Q x f) decreased from 133,905 to 101,000 GHz, and the temperature coefficient of resonant frequency () significantly increased from -39 to 6.35 ppm/A degrees C when samples sintered at 1370 A degrees C for 4 h. Sample with 0.91Li(2)Mg(3)TiO(6)-0.09Ca(0.8)Sr(0.2)TiO(3) sintered at 1370 A degrees C for 4 h possess excellent microwave properties with of 16.4, a Q x f of 113,000 GHz and of -3.65 ppm/A degrees C. It is proposed as low-loss and low-cost dielectric materials for microwave and millimeter wave application.

• 出版日期2017-9
• 单位重庆理工大学; 中国科学院; 中国科学院上海硅酸盐研究所