The effects of Sm₂O₃ doping on properties of PNN–PZT ceramics near morphotropic phase boundary

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• 作者：Cheng Cheng ; De-Yi Zheng ; Gui-Gui Peng…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：2
• 页码：1624-1630
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

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(Ni_1/3Nb_2/3)_0.5 (Zr_0.3Ti_0.7)_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, ε_r = 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.