0.995Bi_(0.5)(Na_(0.8)K_(0.2))_(0.5)TiO_3-0.005(Li_yK_(1-y))SbO_3压电陶瓷的制备及性能研究  

Preparation and Properties of 0. 995Bi_(0. 5)(Na_(0. 8)K_(0. 2))_(0. 5)TiO_3-0.005(Li_yK_(1-y))SbO_3 Lead-free Ceramics

作　　者：李伟[1] 熊健[1] 周毅[1] 周勇[1] 廖运文[2] 

机构地区：[1]西藏大学理学院,西藏拉萨850000 [2]西华师范大学化学化工学院,四川南充637002

出　　处：《广州化工》2013年第17期80-82,共3页GuangZhou Chemical Industry

摘　　要：采用传统固相法制备了新型0.995Bi0.5(Na0.8K0.2)0.5TiO3-0.005(Li y K1-y)SbO3无铅压电陶瓷,利用XRD、SEM等测试技术表征了该陶瓷的晶体结构、表面形貌、压电和介电性能。研究结果表明,在所研究的组成范围内陶瓷材料均能形成纯的钙钛矿固溶体。压电性能随y的增加先增加后减少,在y=10%时压电常数及机电耦合系数达到最大值(d33=111 pC/N,k p=0.220)。A new Bi0. 5 （ Na0. 8K0. 2 ）0. 5 TiO3 - based lead - free piezoelectric ceramics 0. 995 Bi0.005（ Na0. 8 K0. 2 ） 0 5 TiO3 - 0. 005（ LiyK1-y ）Sb03 was prepared by the conventional ceramic sintering technique. Microstructure and shape were studied by x - ray diffraction, scanning electron microscope, etc. The X - ray diffraction patterns showed that all ceramics investigated can form a pure perovskite phase. Scanning electron microscope patterns reveal that the grain size increases with the addition of（ LiyK1-y）SbO3. Piezoelectric and dielectric properties were measured by digital electron instruments. An obvious change in microstructure with decreasing concentration of（ LiyK1 -y ） SbO3 was observed. The piezoelectric constant d33 and the electromechanical coupling factor kp of the ceramics attained the maximum values of 111 pC/N and 0. 22 at y = 10%.

关 键 词：无铅压电陶瓷 微结构 压电性能 介电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]