Optimization of Dielectric Properties of Glass Added BaxSr1-xTiO3 Ceramics for Pulsed Power Applications
BaxSr1-xTiO3 (0.2≤x≤0.5) ceramics with 10 vol% BaO-SiO2-B2O3 glass addition were prepared. The microstructure and dielectric properties were investigated by XRD, SEM, ferroelectric tester and impedance analyzer. The results show that with the decrease of x, the pulse breakdown strength of the samples is increased, and the dielectric constant and dielectric loss is decreased gradually. In the frequency from 10 kHz to 20 MHz, the dielectric constant of all the samples show good frequency stability. For x=0.2, the samples exhibit high breakdown strength of 37.7 kV/mm, moderate dielectric constant of 311 and low dielectric loss of 5×10-4,which is a promising dielectric for pulsed power applications.
Jian-Feng Nie and Allan Morton
Q. M. Zhang et al., "Optimization of Dielectric Properties of Glass Added BaxSr1-xTiO3 Ceramics for Pulsed Power Applications", Materials Science Forum, Vols. 654-656, pp. 1990-1993, 2010