南京工业大学学报（自然科学版）2013，Vol.35Issue(1)：41-46,6.DOI:10.3969/j.issn.1671-7627.2013.01.009
制备工艺对织构化0.94(Na0.5K0.5)NbO3-0.06LiNbO3无铅压电陶瓷结构及性能的影响
Effects of processing on structures and properties of textured 0.94 (Na0.5 K0.5) NbO3-0.06LiNbO3 lead-free piezoelectric ceramics
摘要
Abstract
High textured 0. 94 ( Na0.5 K0.5) NbO3 -0. 06LiNbO3 ( abbreviated as KNLN6 ) lead-free piezoelectric ceramics was prepared using two-step sintering process. The effects on the microstructures, ferroelectric and piezoelectric properties of KNLN6 ceramics were investigated by X-ray diffractometer ( XRD) , scanning electron microscope (SEM) , ferroelectric testing system, and quasi-static analyzer, and the optimum polarization process was determined. The results showed that with the increase of first step sintering temperature, the orientation degree and the grain size of textured KNLN6 piezoelectric ceramics gradually increased, the coercive field Ec gradually decreased, and the remnant polarization Pr initially increased and then decreased. Under the poling condition with poling electric field 25 kV/cm, poling temperature 80 ℃ , and poling time 15 min, the piezoelectric constant d33 of high textured KNLN6 piezoce-ramic was increased by 20% and reached 282 pC/N at first step sintering temperature 1 180 ℃ for 5 min, and at second step sintering temperature 1 000 ℃ for 10 h.关键词
0.94(Na0.5K0.5)NbO3-0.06LiNbO3/织构化/压电性能/极化条件Key words
0. 94(Na0.5K0.5)Nb03-0.06LiNbO3/ textured/ piezoelectric properties/ poling condition分类
通用工业技术引用本文复制引用
李鸿鹏,刘云飞,吕忆农,吴键,张国防..制备工艺对织构化0.94(Na0.5K0.5)NbO3-0.06LiNbO3无铅压电陶瓷结构及性能的影响[J].南京工业大学学报（自然科学版）,2013,35(1):41-46,6.基金项目
江苏高校优势学科建设工程资助项目 （）
