The Effect of Barium Substitution on the Ferroelectric Properties of Sr2Nb2O7 Ceramics. Issue 4 (24th December 2012)

• Record Type: Journal Article
• Authors: Gao, Zhipeng; Ning, Huanpo; Chen, Chen; Wilson, Rory; Shi, Baogui; Ye, Haitao; Yan, Haixue; Reece, Michael J.; Jones, J. L.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 4(2013)
• Page Start: 1163
• Page End: 1170
• Publication Date: 2012-12-24
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12121
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" xml:lang="en" id="jace12121-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>This work revealed that the solid solution compounds of Sr<sub>2<bold>−</bold><italic>x</italic></sub>Ba<sub><italic>x</italic></sub>Nb<sub>2</sub>O<sub>7</sub> are promising lead‐free materials for high‐temperature piezoelectric sensor application. These compounds were confirmed as ferroelectric materials with high Curie points (<bold>></bold> 900°C) by their piezoelectric activity after poling, ferroelectric domain switching in their <italic>P</italic>–<italic>E</italic> hysteresis loops and thermal depoling behavior. The effect of Ba substitution on the structure and properties of Sr<sub>2<bold>−</bold><italic>x</italic></sub>Ba<sub><italic>x</italic></sub>Nb<sub>2</sub>O<sub>7</sub> (<italic>x </italic><bold><</bold> 1.0) was investigated. The solid solution limit of Sr<sub>2<bold>−</bold><italic>x</italic></sub>Ba<sub><italic>x</italic></sub>Nb<sub>2</sub>O<sub>7</sub> was determined by XRD as <italic>x</italic> < 0.6. The <italic>a</italic>‐, <italic>b</italic>‐, <italic>c</italic>‐ axes, and cell volume increase with Ba addition. The textured ceramics of Sr<sub>2<bold>−</bold><italic>x</italic></sub>Ba<sub><italic>x</italic></sub>Nb<sub>2</sub>O<sub>7</sub> were prepared for the first time. The highest <italic>d</italic><sub>33</sub> was measured as 3.6 <bold>±</bold> 0.1 pC/N for Sr<sub>1.8</sub>Ba<sub>0.2</sub>Nb<sub>2</sub>O<sub>7</sub>.</p> </abstract>