Optimization of Dielectric Properties of Glass Added Ba_xSr_1-xTiO₃ Ceramics for Pulsed Power Applications

Abstract:

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.

• Periodical: Materials Science Forum (Volumes 654-656)
• Pages: 1990-1993
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.654-656.1990
• Online since: June 2010
• Authors: Qing Meng Zhang, Lei Wang, Jun Luo, Qun Tang, Jun Du
• Keywords: Barium Strontium Titanate, Breakdown Strength, Dielectric Loss, Glass Addition, Liquid Phase Sintering (LPS)

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