【摘要】 采用化学共沉淀法制备了掺钕钛酸铋陶瓷粉料,对其相组成和形貌进行研究,进而制备块体陶瓷,对其电学性能和疲劳特性进行分析.结果表明:粉料经550℃烧结后开始结晶,随烧结温度的进一步提高,结晶逐步完善而形成单相层状钙钛矿结构.块体材料的2Pr和Ec值分别为12.56μC/cm2和29.9 V/cm.经过1011次读/写循环后BNT的Pr值基本上没有下降,说明材料具有良好的抗疲劳特性.更多还原

【Abstract】 BNT powder was prepared by chemical coprecipitation method. The structure and morphology of BNT were investigated by Xray diffraction and scanning electron microscope. A RT6000HVS ferroelectric tester in virtual ground mode has analyzed the ferroelectric polarization behavior and fatigue characteristic of the BNT ceramics as well. The results showed that the BNT powder started to crystallize at 550 ℃. With the increase of the calcining temperature, the line width and intensity of the diffraction line decreases and increases, respectively, demonstrating the improvement of the crystallinity. The values of the 2P_r and E_c of the BNT ceramics are 12.56 μC/cm² and 29.9 V/cm, respectively. The BNT ceramics was free fatigue and decreased hardly after 10¹¹ read/write cycles.更多还原