Ultralow-fired Li2Mg3TiO6-Ca0.8Sr0.2</ sub>TiO3 composite ceramics with temperature stable at microwave frequency

作者：Ma, Jianli; Fu, Zhifen^*; Liu, Peng^*; Zhao, Liping; Guo, Baochun

来源：Journal of Alloys and Compounds, 2017, 709: 299-303.

DOI：10.1016/j.jallcom.2017.03.103

• Ceramics
• Sintering
• Dielectric properties
• Microstructure

New temperature stable 4 wt% LiF-doped (1-x)Li2Mg3TiO6-xCa(0.8)Sr(0.2)TiO(3) (LMT-CST, x = 0.10, 0.15, 0.20, 0.25) composite ceramics were fabricated by solid-state reaction for developing ultra-low temperature (<= 800 degrees C) sintering microwave dielectric ceramics. Sintering temperatures of LMT-CST ceramics were successfully lowered to 725 degrees C due to LiF liquid-phase sintering and well-densified microstructures were obtained at 800 degrees C. Excellent microwave dielectric properties of epsilon(r) = 18.8, Q x f = 48200 GHz (at 8.2 GHz), tau(f) = 0.3 ppm/degrees C was obtained at 800 degrees C for 0.8 LMT-0.2CST-4wt% LiF ceramics. Such sample was compatible with Ag electrodes, which suggests suitability of the developed material for LTCC applications.

• 出版日期2017-6-30
• 单位安徽理工大学; 陕西师范大学