Effect of Nb doping on structural and electric properties of PZT (65/35) ceramic

Author

Mohiddon, A. ; Kumar, R. ; Goel, P. ; Yadav, K.L.

Author_Institution

Dept. of Phys., Indian Inst. of Technol., Roorkee

Volume

14

Issue

1

fYear

2007

Firstpage

204

Lastpage

211

Abstract

The aim of this study is to determine the effect of Nb⁵⁺ doping on PZT (65/35) based bulk materials in their structure, micro structure and electrical properties. The Nb content was chosen 0-9 mole%. These materials were prepared by conventional mixed oxide method. X ray diffraction studies suggest the compound to be of rhombohedral perovskite phase. Excess addition of Nb result in pyrochlore and fluorite phase develops in PZT (65/35) sample. Detailed studies of dielectric constant as a function of temperature (40degC to 500degC) and frequency (100 Hz to 1 MHz) suggest that the compounds undergo diffuse type of phase transition. Maximum dielectric constant and resistivity were found to be strongly dependent on doping and measuring frequencies. Using complex impedance analysis micro structural parameters such as bulk and grain boundary resistance, bulk charge carrier concentration and relaxation time were determined

Keywords

ceramic insulation; crystal microstructure; doping; neodymium; permittivity; Nb doping; PZT (65/35) ceramic; X ray diffraction; complex impedance analysis; dielectric constant; electric properties; material preparation; micro structural parameter; mixed oxide method; resistivity; rhombohedral perovskite phase; Ceramics; Conductivity; Dielectric constant; Dielectric materials; Dielectric measurements; Diffraction; Doping; Frequency; Niobium; Temperature;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2007.302889

Filename

4088928