New lead-free relaxors based on the K0.5Na0.5Nb0.30-SrTi0.3 solid solution

被引：177

作者：

Kosec, M ^{[1
]}

Bobnar, V ^{[1
]}

Hrovat, M ^{[1
]}

Bernard, J ^{[1
]}

Malic, B ^{[1
]}

Holc, J ^{[1
]}

机构：

[1] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

来源：

JOURNAL OF MATERIALS RESEARCH | 2004年 / 19卷 / 06期

关键词：

D O I：

10.1557/JMR.2004.0229

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New lead-free relaxors have been produced from the K0.5Na0.5NbO3-SrTiO3 (KNN-STO) system. The solid solubility within the studied range of compositions (1 - x) K0.5Na0.5NbO3-xSrTiO(3) was observed for x up to 0.33. A pseudo-cubic perovskite structure was determined for x = 0.15 to 0.25. The high density and the uniform distribution of fine grains and pores were confirmed by the translucency of these ceramics. The 0.85KNN-0.15STO composition reaches the dielectric permittivity of above 3000 at room temperature. Dielectric spectroscopy measurements revealed that, as with lead-based complex perovskites, the cationic distribution disorder is reflected in relaxorlike properties, thus suggesting possible applications based on this environmentally friendly lead-free ceramic system.

引用

页码：1849 / 1854

页数：6

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