BZT复合对BNT-BT陶瓷铁电性能和退极化温度的影响  

Effect of BZT Composite on Ferroelectric Properties and Depolarization Temperature of BNT-BT Ceramics

作　　者：李明阳 张丹 杨少星 曹嘉宁 张洋洋[1] LI Mingyang;ZHANG Dan;YANG Shaoxing;CAO Jianing;ZHANG Yangyang(Engineering Department of Yellow River University of Science and Technology,Zhengzhou 450063,China)

机构地区：[1]黄河科技学院工学部,河南郑州450063

出　　处：《河南科技》2022年第14期82-86,共5页Henan Science and Technology

基　　金：河南省科技厅项目(212102210187);河南省教育厅项目(21B430007、21B510004);教育部2021年国家级高校大学生创新创业训练计划重点支持项目(202111834005);河南省教育厅河南省高校省级大学生创新创业训练计划重点支持项目(S202111834027);教育部2022年国家级高校大学生创新创业训练计划重点支持项目(202211834017、202211834008)。

摘　　要：钛酸铋钠(BNT)体系作为一种潜在的无铅压电陶瓷材料受到广泛关注,但钛酸铋钠的退极化温度过低限制了其发展前景。笔者通过在钛酸铋钠-钛酸钡(BNT-BT)中引入锆钛酸钡(BZT)的方法,利用锆钛酸钡的高极化强度的特点,提高了钛酸铋钠-钛酸钡的退极化温度。研究发现,随着BZT质量分数的增加,BNT-BT经历了铁电-弛豫铁电-铁电-弛豫铁电的转变,当BZT质量分数为15%时,由于BZT的高极化特性,BZT电畴的定向诱导或阻碍了BNT-BT电畴的翻转,重新建立起已被破坏的压电陶瓷的长程有序性,表现出明显的铁电相,压电常数也在退极化温度为100℃时达到了110 pC/N,且退极化温度由80℃提高到100℃。Sodium bismuth titanate(BNT) system has attracted extensive attention as a potential leadfree piezoelectric ceramic material, but the depolarization temperature of sodium bismuth titanate is too low, which limits its development prospect. The depolarization temperature of barium zirconate titanate(BNT-BT) is improved by using the depolarization temperature of barium zirconate titanate. It is found that with the increase of BZT content, BNT-BT undergoes the transformation of ferroelectric relaxor ferroelectric relaxor ferroelectric. When the BZT content is 15wt%, the orientation of BZT domain induces or hinders the reversal of BNT-BT domain due to the high polarization characteristics of BZT, reestablishes the long-range order of damaged piezoelectric ceramics, shows obvious ferroelectric phase, and the piezoelectric constant reaches 110 pC/N at the depolarization temperature of 100 ℃, The depolarization temperature increased from 80 ℃ to 100 ℃.

关 键 词：无铅压电 钛酸铋钠 退极化温度 压电常数 

分 类 号：TQ174.1[化学工程—陶瓷工业] TP212.9[化学工程—硅酸盐工业]