Piezoelectric Properties and Stability of Resonant Frequency of Cr Modified PSZN-PZT Ceramics
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第3期
论文作者：Nie Qiang Sun Qingchi Wang Lifeng
Key words：PSN-PZN-PZT; piezoelectric properties; stability; Cr content;
Abstract: The structure, piezoelectric properties, aging rate and temperature coefficient of resonant frequency of( Pb0. 97Pr0. 03 ) [ ( Zn1/3 Nb2/3 )0.06 ( Sn1/3 Nb2/3 )0.06 ( Zr0. 43 Ti0.45 )0. 88] O3 + 0.5wt% MnO2 ceramics were investigated as a function of Cr dopant content. X-ray diffraction pattern indicates that all samples are all in the tetragonal side near the morphotropic phase boundary, and the tetragonality of PSZN-PZT ceramics is decreased with increasing Cr content.The EPR spectra and the piezoelectric properties of the PSZN-PZT ceramics prove that as the Cr content is low, and high valence of Cr ion plays an important role in ceramics. When Cr content increasing, the properties are dominated by the low valence of Cr ion. The solubility of the Cr in PSZN-PZT ceramics is about 0.7%. 0.5% ～ 0.7% of Cr and 0.5 % Mn are best stabilizers to improve the temperature dependence and aging rate of the resonant frequency of the PSZN-PZT ceramics.
Nie Qiang1，Sun Qingchi2，Wang Lifeng2
(1.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2.Key Laboratory for Advanced Ceramics and Machining Technology, Tianjin 300072, China)
Abstract:The structure, piezoelectric properties, aging rate and temperature coefficient of resonant frequency of( Pb0. 97Pr0. 03 ) [ ( Zn1/3 Nb2/3 )0.06 ( Sn1/3 Nb2/3 )0.06 ( Zr0. 43 Ti0.45 )0. 88] O3 + 0.5wt% MnO2 ceramics were investigated as a function of Cr dopant content. X-ray diffraction pattern indicates that all samples are all in the tetragonal side near the morphotropic phase boundary, and the tetragonality of PSZN-PZT ceramics is decreased with increasing Cr content.The EPR spectra and the piezoelectric properties of the PSZN-PZT ceramics prove that as the Cr content is low, and high valence of Cr ion plays an important role in ceramics. When Cr content increasing, the properties are dominated by the low valence of Cr ion. The solubility of the Cr in PSZN-PZT ceramics is about 0.7%. 0.5% ～ 0.7% of Cr and 0.5 % Mn are best stabilizers to improve the temperature dependence and aging rate of the resonant frequency of the PSZN-PZT ceramics.
Key words:PSN-PZN-PZT; piezoelectric properties; stability; Cr content;
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