Low-temperature sintered Li-2(MnxTi1-x)O-3 microwave dielectric ceramics with adjustable Tf

摘要

B2O3-Bi2O3-Zn-2 ZnO (BBSZ) glass-modified Li-2(MnxTi1-x)O-3 ceramics were fabricated via a solid-state reaction route. Pure phase and dense crystal morphology were obtained at 900 degrees C. Suitable amount of Mn4+-ion substitution could adjust the T-f value of the Li-2(MnxTi1-x)O-3 system to near zero. Among all of the Li-2(Mn-x Ti1-x)O-3 samples, the sample with x = 0.9 (marked as BL9 in this paper) possessed good microwave dielectric properties: epsilon(r) = 18, Q x f = 14,056 GHz (9.58 GHz) and T-f = (+)2.43 ppm/degrees C. It is suggested that the Li-2(Mn-x Ti1-x)O-3 ceramic with BBSZ glass is a suitable low temperature co-fired ceramic (LTCC) candidate for microwave applications.