Dielectric behaviour of strontium titanate glass ceramics with bismuth oxide addition as nucleating agent

摘要

Crystalliztion of perovskite strontium titanate phase in aluminosilicate and borosilicate glass ceramic systems is difficult. Crystallization occurred in complex manner with several silicate and borate phases which appear along with SrTiO-3. Strontium titanate can be crystallizaed in a major amount in strontium titanate borosilicate glass ceramic system by suitable addition of alkali oxide K_2O. Addition of Bi_2O_3 as nucleating gent markedly affect the crystallization behaviour and resulting microstructure.