Microstructure Modifications And Sintering Mechanism Of Ba0.55sr0.4ca0.05tio3 Ceramics Containing Different Mgo Additive For Ltcc Application

Ferroelectric Ba0.55Sr0.4Ca0.05TiO3 (BSCT) ceramics with nano-MgO additive have been prepared by typical electrical ceramic technology sintered at 950 degrees C for 2h. The influence of the additive content on the sintering behaviors of BSCT ceramics is investigated. The results show that the interactions of MgO with BSCT and B2O3-Li2O liquid sintering additive help to form wetting boundaries for accelerating densification process, promote the grain growth of BSCT ceramic. The BSCT ceramic with 20 wt% nano-MgO possesses uniform microstructure, high densification, and superior dielectric properties. The modification mechanism of nano-MgO on BSCT ceramic is summarized as MgO assisted wetting sintering model.