铌钽酸钠钾锂-铟酸铋铁电压电性能的研究
发布时间：2018-09-04 14:15
【摘要】：采用传统固相合成法制备了(1-x)(0.97Na0.5K0.5NbO3+0.03LiTaO3)+xBiInO3[(1-x)(KNN+LT)+xBI]无铅压电陶瓷,研究了该体系的晶体结构、压电、铁电与介电性能。结果表明:(1-x)(KNN+LT)+xBI陶瓷的晶体结构在室温下为正交相和四方相两相共存,随着BI含量的增加,四方相含量逐渐增多,居里温度Tc降低,但是正交四方相转变温度To-t呈现升高趋势,晶格参数逐渐增大。随着BI含量的继续增加,Bi在高温下的挥发导致氧空位的增多,从而使材料性能下降。在x=0.0015时得到组分的最佳性能,其居里温度Tc、相转变温度To-t、压电常数d33、剩余极化Pr、矫顽场Ec分别达到400℃、126℃、160 pC/N、19.26μC/cm2和7.75 kV/cm。
[Abstract]:Lead-free piezoelectric ceramics (1-x) (0.97Na0.5K0.5NbO3 0.03LiTaO3) xBiInO3 [(1-x) (KNN LT) xBI)] were prepared by conventional solid-state synthesis. The crystal structure, piezoelectric, ferroelectric and dielectric properties of the system were studied. The results show that the crystal structure of (1-x) (KNN LT) xBI) ceramics coexists at room temperature with two phases: orthotropic phase and tetragonal phase. With the increase of BI content, the tetragonal phase content increases and the Curie temperature (Tc) decreases, but the quadrature tetragonal phase transition temperature (To-t) increases. The lattice parameters are gradually increasing. With the increase of BI content, the volatilization of Bi at high temperature leads to the increase of oxygen vacancies, which leads to the decrease of the properties of the materials. The optimum properties of the component were obtained at x = 0.0015. The Curie temperature Tc, phase transition temperature To-t, piezoelectric constant d33 and the remanent polarization Pr, coercive field Ec reached 400 鈩，
本文编号：2222387
[Abstract]:Lead-free piezoelectric ceramics (1-x) (0.97Na0.5K0.5NbO3 0.03LiTaO3) xBiInO3 [(1-x) (KNN LT) xBI)] were prepared by conventional solid-state synthesis. The crystal structure, piezoelectric, ferroelectric and dielectric properties of the system were studied. The results show that the crystal structure of (1-x) (KNN LT) xBI) ceramics coexists at room temperature with two phases: orthotropic phase and tetragonal phase. With the increase of BI content, the tetragonal phase content increases and the Curie temperature (Tc) decreases, but the quadrature tetragonal phase transition temperature (To-t) increases. The lattice parameters are gradually increasing. With the increase of BI content, the volatilization of Bi at high temperature leads to the increase of oxygen vacancies, which leads to the decrease of the properties of the materials. The optimum properties of the component were obtained at x = 0.0015. The Curie temperature Tc, phase transition temperature To-t, piezoelectric constant d33 and the remanent polarization Pr, coercive field Ec reached 400 鈩，
本文编号：2222387
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