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Structure Evolution and Electrical Properties of Y 3+ ‐Doped Ba 1− x Ca x Zr 0.07 Ti 0.93 O 3 Ceramics
Author(s) -
Liu Hairui,
Li Qiang,
Li Yuanyuan,
Luo Nengneng,
Shim Jaeshik,
Gao Jinghan,
Yan Qingfeng,
Zhang Yiling,
Chu Xiangcheng
Publication year - 2014
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/jace.12900
Subject(s) - curie temperature , analytical chemistry (journal) , orthorhombic crystal system , ferroelectricity , raman spectroscopy , materials science , tetragonal crystal system , atmospheric temperature range , dielectric , piezoelectricity , doping , mineralogy , crystallography , chemistry , crystal structure , condensed matter physics , optics , physics , optoelectronics , ferromagnetism , composite material , chromatography , meteorology
Lead free piezoelectric ceramics of Y 3+ ‐doped Ba 1− x Ca x Zr 0.07 Ti 0.93 O 3 with x = 0.05, 0.10, and 0.15 were prepared. Composition and temperature‐dependent structural phase evolution and electrical properties of as‐prepared ceramics were studied systematically by X‐ray diffraction, Raman spectroscopy, impedance analyzer, ferroelectric test system, and unipolar strain measurement. Composition with x = 0.10 performs a good piezoelectric constant d 33 of 363 pC/N, coercive field E c of 257 V/mm, remanent polarization P r of 14.5 μC/cm 2 , and a Curie temperature T m of 109°C. High‐resolution X‐ray diffraction was introduced to indicate presence of orthorhombic phase. Converse piezoelectric constant d 33 * of x = 0.10 composition performed better temperature stability in the range from 50°C to 110°C. That means decreasing orthorhombic–tetragonal phase transition temperature could be an effective way to enlarge its operating temperature range.