The effect of barium substitution on the ferroelectric properties of Sr2 Nb2 O7 Ceramics

Zhipeng Gao, Huanpo Ning, Chen Chen, Rory Wilson, Baogui Shi, Haitao Ye, Haixue Yan, Michael J. Reece*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This work revealed that the solid solution compounds of Sr 2-xBaxNb2O7 are promising lead-free materials for high-temperature piezoelectric sensor application. These compounds were confirmed as ferroelectric materials with high Curie points (> 900°C) by their piezoelectric activity after poling, ferroelectric domain switching in their P-E hysteresis loops and thermal depoling behavior. The effect of Ba substitution on the structure and properties of Sr 2-xBaxNb2O7 (x < 1.0) was investigated. The solid solution limit of Sr2-xBaxNb 2O7 was determined by XRD as x < 0.6. The a-, b-, c- axes, and cell volume increase with Ba addition. The textured ceramics of Sr2-xBaxNb2O7 were prepared for the first time. The highest d33 was measured as 3.6 ± 0.1 pC/N for Sr1.8Ba0.2Nb2O7.

Original languageEnglish
Pages (from-to)1163-1170
Number of pages8
JournalJournal of the American Ceramic Society
Volume96
Issue number4
Early online date24 Dec 2012
DOIs
Publication statusPublished - Apr 2013

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