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Enhanced Dielectric and Piezoelectric Properties of Aurivillius‐Type Potassium Bismuth Titanate Ceramics by Cerium Modification
Author(s) -
Wang ChunMing,
Wang JinFeng,
Mao Chaoliang,
Chen Xuefeng,
Dong Xianlin,
Gai ZhiGang,
Zhao MingLei
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02557.x
Subject(s) - aurivillius , materials science , bismuth titanate , dielectric , curie temperature , cerium , piezoelectricity , piezoelectric coefficient , bismuth , microstructure , ceramic , titanate , mineralogy , analytical chemistry (journal) , composite material , ferroelectricity , condensed matter physics , chemistry , metallurgy , optoelectronics , ferromagnetism , chromatography , physics
The microstructure, and dielectric and piezoelectric properties of the CeO 2 ‐modified potassium bismuth titanate K 0.5 Bi 4.5 Ti 4 O 15 (KBT) piezoelectric ceramics were investigated. X‐ray diffraction analysis revealed that the cerium‐modified KBT ceramics have a pure four‐layer Aurivillius‐type structure. The piezoelectric properties of KBT ceramics were significantly enhanced and the dielectric loss decreased by cerium doping. The Curie temperature T c and piezoelectric coefficient d 33 for the KBT ceramics with 0.50 wt% cerium modification were found to be 550°C and 28 pC/N, respectively. The Curie temperature was found to decrease gradually from 555° to 541°C with cerium modification up to 1.00 wt%. Dielectric and annealing spectroscopy showed that the materials possess stable piezoelectric properties.