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Effect of CaZrO3 on phase structure and electrical properties of KNN-based lead-free ceramics

机译：CaZrO3对KNN基无铅陶瓷相结构和电性能的影响

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摘要

(1 - x)[0.93(K0.5Na0.5) NbO3-0.07LiNbO(3)]-xCaZrO(3) (KNN-LN-xCZ) lead-free piezoelectric ceramics have been prepared by the conventional solid state reaction method and investigated to differentiate the effects of polymorphic phase transition. The crystal structure of the ceramics changed from orthorhombic to tetragonal at x >= 0.04, and then both the orthorhombic and tetragonal phases coexisted in the region of 0.04 < x < 0.08 composition, and the orthorhombic-tetragonal phase transition temperature was modified to around room temperature. Remarkably, piezoelectric and ferroelectric properties have been obtained for KNN-LN-xCZ ternary system with x = 0.04, in which the piezoelectric parameter of d*(33) was 320 pm V-1 with Curie temperature T-c = 350 degrees C, strain level = 0.16% at 50 kV cm(-1) and remnant polarization P-r = 27.2 mu C cm(-2).
机译：通过常规固态反应方法制备了（1-x）[0.93（K0.5Na0.5）NbO3-0.07LiNbO（3）]-xCaZrO（3）（KNN-LN-xCZ）无铅压电陶瓷，并且进行了研究以区分多态相变的影响。陶瓷的晶体结构在x> = 0.04时从正交晶变为四方晶，然后在0.04

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