硅酸盐学报2016，Vol.44Issue(9)：1265-1269,5.DOI:10.14062/j.issn.0454-5648.2016.09.02
W、Zr共同掺杂对铌酸钾钠基无铅压电陶瓷的影响
Effects of W and Zr Co-Doping on Potassium Sodium Niobate-based Lead-free Piezoelectric Ceramic
摘要
Abstract
Lead-free piezoelectric ceramics 0.94(Na0.535K0.48)Nb1–x(W0.5Zr0.5)xO3–0.06LiSbO3 (x=0, 0.01, 0.02, 0.03, 0.04) were fabricated by a conventional solid phase sintering method. In the ceramics, W6+and Zr4+appear as a group to replace Nb5+. And the effects that these cations with different valences brought to KNN-based lead-free piezoelectric ceramics were investigated. The results show that crystal structure changes from tetragonal to orthorhombic as the doping amount increases, and the lattice space distance becomes more covalent as well. In the ceramics, fine comprehensive properties can be achieved when x=1%, i.e., piezoelectric constant d33 is 203 pC/N, planar electromechanical coupling factor kp is 0.309, relative dielectric constantεr is 813, the Curie temperature TC is 350℃, and the sintering property is also improved. It is indicated that this doping method needs to be further investigated.关键词
铌酸钾钠/无铅压电陶瓷/钨锆共同掺杂/晶体结构/热稳定性Key words
potassium sodium niobate/lead-free piezoelectric ceramics/wolfram and zirconium co-dopmg/phase structure/thermal stability引用本文复制引用
郭朋彦,张瑞珠,郭雯鹏,赵高磊,闫镇威..W、Zr共同掺杂对铌酸钾钠基无铅压电陶瓷的影响[J].硅酸盐学报,2016,44(9):1265-1269,5.基金项目
水利部科技推广计划(TG1420)；华北水利水电大学高层次人才科研启动项目资助。 （TG1420）
