中国船舶集团有限公司第七一五研究所，杭州 310012
随着我国科技水平的飞速发展，激光惯性导航系统的精度要求越来越高。采用工业级原材料，通过固相合成法制备了铌锑-铌镍-锆钛酸铅(PSN-PNN-PZT)四元系大应变压电陶瓷材料，讨论了不同含量Sr对PSN-PNN-PZT压电陶瓷材料介电性能、压电性能的影响。结果表明：当Sr含量为1%(摩尔分数)、n(Zr)/n(Ti)=43/57(摩尔比)时，PSN-PNN-PZT组成位于准同型相界附近，压电陶瓷性能较优，获得了一种相对介电常数εT33/ε0、机电耦合系数kp、压电常数d33、介电损耗tan δ、居里温度Tc分别为4 090、0.664、686 pC/N、0.016 5及213 ℃的大应变压电陶瓷材料；基于该材料配方制备的24 mm×5 mm×0.4 mm压电陶瓷圆环，在100 V的驱动电压下产生的应变量能达到2.500 5 μm，较现有的PZT-14(P14)材料提升32.4%，能应用于高精度激光陀螺稳频器中，提高压电陶瓷微位移驱动器的可靠性。
压电陶瓷 大应变 介电性能 压电性能 居里温度 piezoelectric ceramics PSN-PNN-PZT PSN-PNN-PZT large strain dielectric property piezoelectric property Curie temperature
1 中国振华集团新云电子元器件有限责任公司,贵州 贵阳 550025
2 贵州振华红云电子有限公司, 贵州 贵阳 550025
3 贵州大学 材料与冶金学院, 贵州 贵阳 550025
以Pb(Ni1/3Nb2/3)O3-Pb(Zr0.41Ti0.59)O3(PNN-PZT)为基础体系, 通过对烧结助剂x%CuO(质量比)和y%LiBiO2(质量比)的质量进行调节, 对陶瓷样品的相结构、微观组织形貌及电学性能进行了分析, 阐述了助烧剂对陶瓷样品性能的影响。结果发现, 在温度940~960 ℃下陶瓷烧结成瓷, 且晶粒长大较充分。当x =0.2, y =1时, 陶瓷样品的电学性能最优, 即此时压电常数d33 =608 pC/N, 机电耦合系数kp=0.65, 介电损耗tan δ =2.19%, 介电常数εr=3 843。采用烧结助剂质量比x=0.2,y=1的粉体制备7 mm×7 mm×36 mm的叠层压电驱动器, 然后进行微观组织形貌和位移特性研究。叠层压电驱动器断面微观结构表明, 电极层与陶瓷层粘接紧密, 无裂缝或间隙产生。位移的测试结果表明, 随着电压的增加, 位移也在逐渐增加, 在驱动电压为150 V时, 其最大位移为46.280 μm, 位移增大的同时, 迟滞逐渐降低。
叠层压电陶瓷 烧结助剂 低温共烧 PNN-PZT PNN-PZT stacked piezoceramics sintering aids low-temperature co-fire
Author Affiliations
Abstract
1 School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, P. R. China
2 School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, P. R. China
3 Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
In this paper, 0.36Pb(NiNb)O3–0.24PbZrO3–0.40PbTiO3(PNN-PZT) ceramic was prepared, and texture engineering was performed on this PNN-PZT ceramic to improve its electromechanical properties and temperature stability. Single element ultrasonic transducers were prepared using PNN-PZT, PNN-PZT textured ceramics, and their performance were evaluated and compared using a PZT-5H ceramic based transducer as the benchmark. It is shown that the sensitivity and bandwidth of the PNN-PZT textured ceramic-based transducer are much superior to regular PNN-PZT ceramic and PZT-5H ceramic based transducers.In this paper, 0.36Pb(NiNb)O3–0.24PbZrO3–0.40PbTiO3(PNN-PZT) ceramic was prepared, and texture engineering was performed on this PNN-PZT ceramic to improve its electromechanical properties and temperature stability. Single element ultrasonic transducers were prepared using PNN-PZT, PNN-PZT textured ceramics, and their performance were evaluated and compared using a PZT-5H ceramic based transducer as the benchmark. It is shown that the sensitivity and bandwidth of the PNN-PZT textured ceramic-based transducer are much superior to regular PNN-PZT ceramic and PZT-5H ceramic based transducers.
Textured ceramic ultrasonic transducer PNN-PZT Journal of Advanced Dielectrics
2022, 12(4): 2244003
