Effects of Nb-doping on the micro-structure and dielectric properties of (Bi0.5Na0.5)TiO3 ceramics

Bismuth sodium titanate [(Bi0.5Na0.5)TiO3 or BNT] ceramics incorporated with 0, 1, 5, 10, 15 and 20mol% niobium were prepared by conventional solid state reaction method. The green bodies were sintered at 1050°C for 2h to obtain dense ceramics. The effects of substitution of niobium ion for titanium...

Full description

Saved in:
Bibliographic Details
Published in:Ceramics international 2013-05, Vol.39, p.S113-S117
Main Authors: Petnoi, Napatporn, Bomlai, Pornsuda, Jiansirisomboon, Sukanda, Watcharapasorn, Anucha
Format: Article
Language:English
Subjects:
A. Sintering
B. X-ray methods
C. Dielectric properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Bismuth sodium titanate [(Bi0.5Na0.5)TiO3 or BNT] ceramics incorporated with 0, 1, 5, 10, 15 and 20mol% niobium were prepared by conventional solid state reaction method. The green bodies were sintered at 1050°C for 2h to obtain dense ceramics. The effects of substitution of niobium ion for titanium ion in BNT ceramics on micro-structure and dielectric properties were investigated. X-ray diffraction analysis showed the presence of a secondary phase when more than 5mol% niobium was added. Within the solubility limit, Nb doping caused the grain size of BNTNb to be smaller than the undoped sample. The investigation of the dielectric properties showed that the transition temperature (Tc) was found to shift towards lower temperature as the content of Nb increased. In this research, the donor-type behavior and induced charged defects had significant influence on the electrical properties of Nb-doped BNT ceramics.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2012.10.045