Preparation and dielectric properties of barium strontium titanate glass-ceramics sintered from sol–gel-derived powders

Homogeneous barium strontium titanate (BST) glass-ceramic has been successfully prepared by sol–gel process. Experimental results showed that perovskite barium strontium titanate phase formed at 700 °C. Much smaller sized BST grains are obtained and the grain boundaries are not distinct in the sintered glass-ceramic systems. The grain grown with the sintering temperature increased. The glass-ceramic samples were sintered at lower temperatures compared to the conventional barium strontium titanate ceramic. The dielectric permittivity of BST glass-ceramic samples generally decreased as the amounts of Zn–B–Si–O glass added. The dielectric permittivity of BST glass-ceramic samples generally increased and dielectric dissipation of BST glass-ceramic samples decreased as the sintering temperature increased. With the decreasing of grain size, the dielectric peaks of BST glass-ceramic samples become lower and broader.