The effect of Zn–B–Si–O addition on Ba0.7Sr0.3TiO3 by sol–gel process

Barium strontium titanate (Ba0.7Sr0.3TiO3, BST) ceramic and BST glass–ceramics were prepared by sol–gel process and the samples were sintered at different temperatures. Microstructure, bulk density and dielectric property were measured, respectively. The results revealed that the relative density of BST glass–ceramic with 25% (mol%) glass forming content was about 96% after being sintered at 1075 °C and that of BST glass–ceramic (40% glass forming content) sintered at 975 °C was about 97%. The dielectric constant of BST glass–ceramic is lower than that of the BST ceramic and the permittivity of BST glass–ceramic was decreased with the glass content increasing.