Effect of BaO-Al2O3-B2O3-SiO2 glass additive on densification and dielectric properties of Ba0.3Sr0.7TiO3 ceramics

Z. H. WU; H. X. LIU; M. H. CAO; Z. Y. SHEN; Z. H. YAO; H. HAO; D. B. LUO

doi:10.2109/jcersj2.116.345

Papers

Effect of BaO-Al₂O₃-B₂O₃-SiO₂ glass additive on densification and dielectric properties of Ba_0.3Sr_0.7TiO₃ ceramics

Z. H. WU, H. X. LIU, M. H. CAO, Z. Y. SHEN, Z. H. YAO, H. HAO, D. B. LUO

Author information

Keywords: Barium strontium titanate, Densification behavior, Breakdown strength, Glass additive

JOURNAL FREE ACCESS

2008 Volume 116 Issue 1350 Pages 345-349

DOI https://doi.org/10.2109/jcersj2.116.345

Details

Abstract

To fabricate the energy storage ceramics with large sizes for pulsed power transmission line, the densification behavior and dielectric properties of Ba_0.3Sr_0.7TiO₃ with 0-8 mass% BaO-Al₂O₃-B₂O₃-SiO₂ glass additive were investigated. With increasing glass content, both the densification temperature and densification rate decreased remarkably. The shrinkage rate mismatch caused by green density gradient also reduced remarkably, which contributed to the fabrication of large sizes of ceramic with dense microstructure. The additions of glass phase decrease the dielectric constant. However, the breakdown strength of the samples can be increased by a factor of 1.5 over the pure BST because of the modification of the microstructure. For the samples containing 4 mass% glass additions, optimal dielectric properties were obtained: dielectric constant is 440, dielectric loss is 3.5×10^-3 at 1 MHz, and breakdown strength is 16.4 kV/mm.

Corresponding author

Register with J-STAGE for free!