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Published in:
20-09-2016
The effects of Sm2O3 doping on properties of PNN–PZT ceramics near morphotropic phase boundary
Published in: Journal of Materials Science: Materials in Electronics | Issue 2/2017
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Abstract
The present study is an investigation of the effects of Sm2O3 doping on properties near morphotropic phase boundary (MPB) of nickel niobium ternary system lead zirconate titanate (PNN–PZT) ceramics. Pb(Ni1/3Nb2/3)0.5 (Zr0.3Ti0.7)0.5O3 (0.5PNN–0.5PZT + xSm) piezoelectric ceramics were prepared by a traditional two-step solid-state reaction method. The specimens exhibit the homogeneous perovskite structure without the secondary phase. When x = 0.6 wt% and x = 0.8 wt%, their diffraction peaks are the most obvious, they may have the best P–T MPB composition. The samples exhibit the P–T MPB composition have a good properties, which is in accord with the electric properties variation and the crystalline grain variation well. When x = 0.6 wt%, the ceramics exhibited electric properties: d33 = 688 pC/N, kp = 0.579, εr = 6260, tanδ = 0.0207. It shows that the P–T MPB composition have relationships with the electric properties variation and the crystalline grain variation to some extent.