Effect of Glass Additive on Microstructure and Dielectric Properties of SrTiO₃ Ceramics

Abstract

The compositions of 0.9SrTiO ₃ -0.1TiO₂ with 0–8wt% Borosilicate glass additive were prepared. The microstructures and dielectric properties of the sintered bodies were studied. It was found a tiny amount of glass additive could lower the sintering temperature of the ceramics, and a very dense microstructure with fine grains was obtained, which resulted in higher dielectric constant and higher breakdown strength (BDS). However, As Borosilicate glass content increased, SrTiO₃ had a tendency to react with the glass phase resulting in the productions of SrAl₂Si₂O₈ and TiO₂, which had a negative influence on the microstructures of ceramics, consequently degraded the dielectric properties.

Keywords:

• Dielectric ceramic
• SrTiO₃
• borosilicate glass

Acknowledgment

The authors would like to thank the support of Natural Science Foundation of China (Grand Num: 50472016), Foundation for Innovative Research Team of Hubei province (Grand Num: 2005ABC004).