Effect of Cr2O3 addition on the structure and electrical properties of Pb((Zn1/3Nb2/3)0.20(Zr0.50Ti0.50)0.80)O3 ceramics
作者： Y.D. Hou , P.X. Lu , M.K. Zhu , X.M. Song , J.L. Tang
DOI: 10.1016/J.MSEB.2004.09.015
关键词: Columbite 、 Analytical chemistry 、 Phase (matter) 、 Ceramic 、 Grain size 、 Metallurgy 、 Grain boundary 、 Tetragonal crystal system 、 Grain growth 、 Phase boundary 、 Materials science
摘要: Abstract The structure and electrical properties of Cr2O3-doped Pb(Zn1/3Nb2/3)0.20(Zr0.50Ti0.50)0.80O3 system (0.2PZN–0.8PZT) were described in this paper. Materials with pure perovskite fabricated by the columbite precursor method. Addition Cr2O3 stabilized tetragonal phase against rhombohedral one, moving morphotropic boundary (MPB) composition toward PbTiO3-deficient side. grain size was steadily enhanced when small amounts added to system. However, addition above solubility 0.3 wt.% inhibited growth due accumulation Cr ion at boundary. values electromechanical coupling factor, kp, piezoelectric constant, d33 are optimized for samples (kp = 0.70, d33 = 491 pC/N), which suggested that effects plays a dominant role on improving than oxygen vacancies low doping region 0–0.3 wt.%.
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