Ferroelectric phase transition in Ba5RTi3Nb7O30 [R = Nd, Eu, Gd] ceramics

被引：52

作者：

Choudhary, RNP ^{[1
]}

Shannigrahi, SR ^{[1
]}

Singh, AK ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Kharagpur 721302, W Bengal, India

来源：

BULLETIN OF MATERIALS SCIENCE | 1999年 / 22卷 / 06期

关键词：

polycrystalline; ferroelectric; tungsten-bronze structure; dielectric constant; electrical conduction;

D O I：

10.1007/BF02745689

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline samples of Ba5RTi3Nb7O30 [R = Nd, Eu, Gd], were prepared using high-temperature solid-state reaction technique. Preliminary X-ray structural analysis of the compounds shows the formation of single phase compounds (orthorhombic crystal system) at room temperature. Detailed studies of dielectric properties (epsilon, tan delta, sigma) as a function of frequency (400 Hz to 10 kHz) and temperature (30 degrees to 380 degrees C) show that these compounds exhibit diffuse ferroelectric phase transition.

引用

页码：975 / 979

页数：5