【摘要】 用常规氧化物固溶方法制备了无铅压电铌酸盐（（Na0.5K0.5）1-xLixSbyNb1-yO3）陶瓷。实验结果表明,Li+和Sb5+的引入提高了陶瓷的压电性能。在一定配比范围内（Li和Sb在10%摩尔分数以内）,材料为斜方、四方相共存的钙钛矿结构,材料的压电常数d33在270 pC/N以上,机电耦合系数kp、kt、k33分别达到49×10–2、43×10–2、64×10–2。介质损耗tgδ小于2.0×10₂,居里温度tC高达375℃。更多还原

【Abstract】 Sodium-potassium Niobate ceramics were prepared by conventional oxide solid-solution technique.The piezoelectric properties of Sodium-potassium Niobate at morphotropic phase boundary(MPB) were investigated.The results show that Li+ and Sb5+ could enhance the piezoelectric properties of the ceramics,which piezoelectric constant d33 is up to 270 pC/N or more,electromechanic coupling factors kp is 0.49、kt is 0.43、k33 is 0.64,dielectric loss tgδ < 2.0×10–2 and curie temperature tC is up to 375℃.更多还原