Crystallization and Dielectric Properties of Ferroelectric Glass-Ceramics Containing Sodium Niobate Crystals

被引：4

作者：

Tipakontitikul, R. ^{[1
]}

Kamonlert, A. ^{[1
]}

Niyompan, A. ^{[1
]}

机构：

[1] Ubon Ratchathani Univ, Fac Sci, Dept Phys, Warinchamrap 34190, Ubon Ratchathan, Thailand

来源：

FERROELECTRICS | 2013年 / 456卷 / 01期

关键词：

Ferroelectric glass-ceramics; sodium niobate; dielectric properties; SYSTEM;

D O I：

10.1080/00150193.2013.846181

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ferroelectric glass-ceramics of the sodium-niobate-aluminum-silicate (NaO-Nb2O5-SiO2+Al2O3) system, with various amounts of ZrO2 added, were synthesized through melt casting followed by controlled crystallization. The crystallization behavior, microstructure, and dielectric performances of the glass-ceramics were investigated. The addition of 1mol% ZrO2 to the glass-ceramics improved the glass forming ability of the phase separated melts and supported the formation of transparent glass-ceramics after precipitation of the NaNbO3 ferroelectric crystals. The presence of ZrO2 also promoted a well-defined microstructure which presented as an improvement in the dielectric constant of the glass-ceramic heat treated at 750 degrees C for 1h. Dipole polarization was responsible for the dielectric response of the glass-ceramics, but due to structural heterogeneities coupled with high migration of the mobile species, a complicated dielectric relaxation mechanism was also found.

引用

页码：21 / 30

页数：10

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