Structural and electrical properties of (1-x)Pb (Zr_yTi_(1-y))03-xSm(Fe~(3+)_(0.5), Nb~(5+)_(0.5))O3 ceramics prepared by conventional solid state synthesis and sintered at low temperature

摘要

The phase structure, microstructure and electrical properties of (1-x)Pb(Zr_yTi_(1-y))O3-xSm(Fe~(3+)_(0.5), Nb~(5+)_(0.5))O3 (PZT-SFN) (with x = 2 %, 41%< y <57 %) piezoelectric ceramics were prepared by the conventional solid state method, and effects of SFN and the Zr/Ti ratio content on the piezoelectric properties of PZT ceramics were mainly investigated. A stable solid solution has been formed between PZT and SFN, and a morphotropic phase boundary of PZT-SFN ceramics is identified in the range of 51% < y <55 %. The Curie temperature of PZT-SFN ceramics decreases with increasing at Zr/Ti ratio content. A higher ε_r value and a lower tan8 value are demonstrated for the PZT-SFN ceramics with y = 53 %.