Premium
Microstructure and piezoelectric properties of Li‐doped Bi 0.5 (Na 0.825 K 0.175 ) 0.5 TiO 3 piezoelectric ceramics
Author(s) -
Chen Xiaoming,
Liao Yunwen,
Mao Lijun,
Deng Yilan,
Wang Huaiping,
Chen Qiang,
Zhu Jiliang,
Xiao Dingquan,
Zhu Jianguo,
Xu Guangliang
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925009
Subject(s) - microstructure , piezoelectricity , materials science , ceramic , dielectric , grain size , piezoelectric coefficient , doping , analytical chemistry (journal) , perovskite (structure) , mineralogy , composite material , crystallography , chemistry , optoelectronics , chromatography
Piezoelectric ceramics Bi 0.5 (Na 0.825 K 0.175 ) 0.5 TiO 3 + x wt% Li 2 CO 3 (abbreviated as BNKTL‐ x ) with x ranging from 0 to 10 were synthesized by conventional solid‐state reaction. XRD results reveal that the ceramics possess pure perovskite phase from x = 0 to x = 1.0. The SEM micrographs show that ceramics have a dense microstructure with a fine grain size at 1145 °C when x < 5.0. The measurements of dielectric and piezoelectric properties indicate that the optimum piezoelectric properties constant d 33 = 174 pC/N at x = 0.5 and planar electromechanical coupling factor k p = 29.7% at x = 0.75 are observed. The depolarization temperature T d of BNKTL‐1.0 ceramics is above 170 °C. It is apparent that the ceramics can be employed in practical applications. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)