IMPROVED FERROELECTRIC PROPERTIES OF NIOBIUM-DOPED PB[(SC1/2NB1/2)TI]O3 CERAMIC MATERIAL

被引：61
|
作者：
YAMASHITA, Y
机构：
[1] D Center, Toshiba Corporation, Saiwai-ku, Kawasaki, 210
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 1993年 / 32卷 / 11A期
关键词：
CERAMICS; PIEZOELECTRIC MATERIAL; RELAXOR; LEAD SCANDIUM NIOBATE; LEAD TITANATE; ELECTRICAL RESISTIVITY; DIELECTRIC CONSTANT; ELECTROMECHANICAL COUPLING FACTOR; CURIE TEMPERATURE; EXPERIMENT;
D O I：
10.1143/JJAP.32.5036
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effects of doping niobium and scandium in Pb[(Sc1/2Nb1/2)0.575Ti0.425]O3 piezoelectric polycrystalline ceramics were investigated. Complete single-phase perovskite with high density was obtained with all samples fired at 1275-degrees-C. Niobium doping decreased the grain size, enhanced the maximum dielectric constant value and increased the electrical resistivity by two orders of magnitude compared with nondoped samples. Large electromechanical coupling factors of k(p) = 69%, k(t) = 52% and k33 = 76%, which are almost equivalent to value for the best PZT-based piezoelectric ceramics, were obtained in niobium-doped specimens. The material has the largest electromechanical coupling factor of all relaxor-lead titanate binary ceramics systems so far reported.
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页码：5036 / 5040
页数：5
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