期刊
JOURNAL OF ELECTROCERAMICS
卷 21, 期 1-4, 页码 263-266出版社
SPRINGER
DOI: 10.1007/s10832-007-9136-0
关键词
Morphotropic phase boundary; Lead-free piezoelectric; Niobate; Perovskite
The high density perovskite titanates-modified potassium-sodium niobate solid solutions (1-x)(Na0.5K0.5) NbO3-xBaTio(3) and (1-x)(Na0.5K0.5)NbO3-xSrTiO(3) have been prepared by the solid state reaction method. The phase diagram summarized from the dielectric property measurement reveals that there exists a tetragonal/orthorhombic morphotropic phase boundary for both the solid solutions. The piezoelectric properties show enhanced behavior at around the tetragonal/orthorhombic morphotropic phase boundary. It is believed that the origin for the high piezoelectric performance (Na;K)NbO3-based lead-free piezoelectric ceramics is the same as that for the lead zinc niobate-lead titanate solid solution.
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