Impedance analysis of Pb2Sb3LaTi5O18 ceramic

被引：25

作者：

Suman, CK

Prasad, K ^{[1
]}

Choudhary, RNP

机构：

[1] TM Bhagalpur Univ, Univ Dept Phys, Bhagalpur 812007, India

[2] Indian Inst Technol, Dept Phys & Meteorol, Kharagpur 712302, W Bengal, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2004年 / 27卷 / 06期

关键词：

Pb2Sb3LaTi5O18; impedance; phase transition; dielectric constant; orthorhombic structure;

D O I：

10.1007/BF02707284

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline sample of Pb2Sb3LaTi5O18, a member of tungsten-bronze (TB) family, was prepared using a high temperature solid-state reaction technique. XRD analysis indicated the formation of a single-phase orthorhombic structure. The dielectric studies revealed the diffuse phase transition and the transition temperature was found to be at 52degreesC. Impedance plots were used as tools to analyse the sample behaviour as a function of frequency. Cole-Cole plots showed Debye relaxation. The activation energy was estimated to be 0.634 eV from the temperature variation of d.c. conductivity. The nature of variation of d.c. conductivity with temperature suggested NTCR behaviour.

引用

页码：547 / 553

页数：7

共 36 条

[11] FERROELECTRIC TUNGSTEN BRONZE-TYPE CRYSTAL STRUCTURES .I. BARIUM STRONTIUM NIOBATE BA0.27SR0.75NB2O5.78 [J].