A new series of low-temperature cofirable Li3Ba2La3(1-x)Y3x(MoO4)(8) microwave dielectric ceramics

作者：Zuo, Ruzhong^*; Xu, Yudong; Shi, Min; Li, Weiqiong; He, Liangguo

来源：Journal of the European Ceramic Society, 2018, 38(14): 4677-4681.

DOI：10.1016/j.jeurceramsoc.2018.06.019

• Microwave dielectrics ceramics
• Low-temperature firing
• LTCC
• Molybdate

A new series of Li3Ba2La3(1-x)Y3x(MoO4)(8) microwave dielectric ceramics were prepared by a conventional solidstate reaction method. The Rietveld refinement results further confirm that Li3Ba2La3(1-x)Y3x(MoO4)(8) belongs to a monoclinic system with space group C2/c. Scanning electron microscopy results reveal that Li3Ba2La3(1-x)Y3x(MoO4)(8) ceramics can be well sintered at a low sintering temperature. In addition, the permittivity (epsilon(r)) of Li3Ba2La3(1-x)Y3x(MoO4)(8) ceramics was found to decrease gradually with increasing substitution content of Y3+, while the quality factor (Qxf) and temperature coefficient of resonant frequency (tau(f)) increase with x monotonously. The x = 0.4 ceramic sintered at 700 degrees C for 4 h possesses optimum microwave dielectric properties of epsilon(r) 14.4, Qxf similar to 14,994 GHz (at 9.0 GHz) and tau(f) similar to + 6.9 ppm/degrees C. Particularly, no chemical reaction between the matrix phase and Ag metal suggests that the Li3Ba2La3(1-x)Y3x(MoO4)(8) ceramic might be a promising candidate for low-temperature co-fired ceramic applications.

• 出版日期2018-11
• 单位合肥工业大学