Peculiar properties of phase transitions in Na0.5Bi0.5TiO3-0.06BaTiO3 lead-free relaxor ferroelectrics seen via acoustic emission

被引：7

作者：

Dul'kin, Evgeniy ^{[1
]}

Tiagunova, Jenia ^{[1
]}

Mojaev, Evgeny ^{[1
]}

Roth, Michael ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Dept Appl Phys, IL-91904 Jerusalem, Israel

来源：

FUNCTIONAL MATERIALS LETTERS | 2017年 / 10卷 / 04期

基金：

以色列科学基金会;

关键词：

Lead-free relaxor ferroelectrics; phase transitions; Burns temperature; intermediate temperature; acoustic emission; FREE (1-X)(BI1/2NA1/2)TIO3-XBATIO(3) CERAMICS; FREE PIEZOELECTRIC CERAMICS; ELECTRICAL-PROPERTIES; THERMAL-EXPANSION; SINGLE-CRYSTALS; (BI1/2NA1/2)TIO3-BATIO3; TEMPERATURES; DIAGRAM; SYSTEM; FIELD;

D O I：

10.1142/S1793604717500485

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Na0.5Bi0.5TiO3-0.06BaTiO(3) relaxor ferroelectrics ( RFEs) ceramic samples were investigated by means of dielectric and acoustic emission methods in the temperature range of 70-350 degrees C and in dependence on frequency. Dielectric curve exhibits two anomalies: strongly dispersive the local maximum, within 130-180 degrees C and slightly dispersive the smeared high-temperature maximum within 300-310 degrees C. Acoustic emission exhibits the five groups of bursts: near 123 degrees C, 150-180 degrees C, near 225 degrees C, 300-310 degrees C and 327 degrees C. The first and third groups of acoustic emission bursts correspond to phase transitions of R3c-P4bm phases coexisting in this temperature, range, while the fourth and fifth groups of acoustic emission bursts correspond to P4bm-P4 / mbm-Pm3 m phase transitions. The second group of acoustic emission bursts corresponds to strongly dispersive local maximum at which no phase transition has been proved in Na0.5Bi0.5TiO3-0.06BaTiO(3) The existence and the location of the intermediate temperature, T*, in Na0.5Bi0.5TiO3-0.06BaTiO(3) compound are discussed.

引用

页数：4

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