Influence of Zr/Ti ratio on the dielectric properties of BaZrxTi1−xO3 ceramics for high-voltage capacitor applications

Yan Zhang, Yaoyao Li, Haikui Zhu, Zhenxiao Fu, Qitu Zhang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Ba(ZrxTi1−x)O3 ceramics are prepared via the conventional solid state reaction method. The Zr4+ ions have diffused into the BaTiO3 lattices to form a homogenous solid solution. The effects of Zr/Ti ratio on dielectric properties and breakdown strength of Ba(ZrxTi1−x)O3 ceramics are systematically discussed. The high porosities of Ba(ZrxTi1−x)O3 ceramics deteriorate seriously the dielectric constant, dielectric loss and the breakdown strength. When the concentration of Zr4+ ions increase from x = 0.05 to x = 0.20, the Curie temperature Tc decreases slightly from 120 to 60 °C, the grain sizes decrease slightly as well attributing to the difference ionic radius of Ti4+ ions and Zr4+ ions. The concentration of Zr4+ ions has a significant effect on the breakdown strength of Ba(ZrxTi1−x)O3 ceramics. Excellent breakdown strength and dielectric properties are achieved in the BaZr0.15Ti0.85O3 ceramics sintered at 1260 °C for 2 h: Eb = 12.028 kv/mm, εr = 3334.6, tanδ = 0.005.

Original languageEnglish
Pages (from-to)9572-9576
Number of pages5
JournalJournal of Materials Science: Materials in Electronics
Volume27
Issue number9
DOIs
StatePublished - 1 Sep 2016

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