Low Temperature Sintering of (Ca_(0.9375)Sr_(0.0625))_(0.25)(Li_(0.5)Sm_(0.5))_(0.75)TiO_3 Microwave Dielectric Ceramics

摘要

The sintering behavior and microwave dielectric properties of the (Ca_(0.9375)Sr_(0.0625))_(0.25)(Li_(0.5)Sm_(0.5))_(0.75)TiO_3 (CSLST) ceramics doped with different amounts of Li_2O-B_2O_3-SiO_2-CaO-Al_2O_3(LBSCA) glass were investigated. The sintering temperature of the CSLST ceramics can be effectively reduced over 200"C due to the addition of LBSCA glass. For the 5 wt% LBSCA-doped CSLST ceramics, which are sintered at only 1000°C for 5 h, show optimum microwave dielectric properties as follows: ε_r=84.74,Qf=2446 GHz and τ_f=-12.48 ppm/°C.