Microwave Sintering of Ba_6-3xSm_8+2xTi₁₈O₅₄ ceramics

The Ba_6-3xSm_8+2xTi₁₈O₅₄ (x=0.67, BST) ceramics were prepared by microwave sintering methods, and the sintering character, microstructure, phase composition and microwave dielectric properties were analyzed. Those properties were compared with the same compositional material prepared by conventional process. The results showed that microwave sintering method could shorten the sintering period and enhance the density of BST ceramics comparing with the conventional sintering. There were no differences in the components of microwave and conventional sintered samples. The grain size of BST ceramics with microwave sintering method was smaller. Microwave dielectric properties were ε_r=82.89, Qf=8450 GHz(f=4.75 GHz), τ_f=22.58 × 10^-6/°C.