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Microstructure, dielectric, and piezoelectric properties of Ce‐modified Na 0.5 Bi 4.5 Ti 4 O 15 high temperature piezoceramics
Author(s) -
Zhao Liang,
Xu JianXiu,
Yin Na,
Wang HongChao,
Zhang ChengJu,
Wang JinFeng
Publication year - 2008
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200802023
Subject(s) - materials science , curie temperature , aurivillius , cerium , dielectric , microstructure , piezoelectricity , bismuth titanate , bismuth , analytical chemistry (journal) , ceramic , piezoelectric coefficient , mineralogy , ferroelectricity , composite material , metallurgy , chemistry , ferromagnetism , condensed matter physics , chromatography , physics , optoelectronics
The cerium modified sodium bismuth titanate (Na 0.5 Bi 4.5 Ti 4 O 15 , NBT) piezoelectric ceramics have been prepared by using the conventional mixed oxide method. X‐ray diffraction analysis revealed that the cerium modified NBT ceramics have a pure four‐layer Aurivillius phase structure. The piezoelectric activity of NBT ceramics was found significantly improved by the modification of cerium. The Curie temperature T c , and piezoelectric coefficient d 33 for the NBT ceramics with 0.50 wt% cerium modification were found to be 655 °C, and 28 pC/N respectively. The Curie temperature gradually decreased from 668 °C to 653 °C with the increase of cerium modification. The dielectric spectroscopy showed that the samples possess stable piezoelectric properties, demonstrating practical potential that for high temperature applications. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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