微波辅助sol-gel法合成Bi_(0.5)Na_(0.5)TiO_(3)粉体及其压电性能研究  

Study on Microwave-Assisted Sol-Gel Synthesis of Bi_(0.5)Na_(0.5)TiO_(3) Powders and Their Piezoelectric Properties

作　　者：武家莹 刘佳[1] 胡月 房国丽[1] 郭小雷 范玉杰 Wu Jiaying;Liu Jia;Hu Yue;Fang Guoli;Guo Xiaolei;Fan Yujie(School of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China;Ningxia Kunda Automation Technology Co.,LTD.,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]宁夏坤达自动化科技有限公司,宁夏银川750021

出　　处：《宁夏大学学报（自然科学版）》2024年第2期218-224,共7页Journal of Ningxia University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52369020);银川市校企联合创新发展专项基金资助项目(2022XQ002);宁夏重点研发计划基金资助项目(2019BFG02018);北方民族大学高层次人才计划基金资助项目。

摘　　要：采用微波辅助溶胶-凝胶(sol-gel)法制备Bi_(0.5)Na_(0.5)TiO_(3)(BNT)粉体,通过DSC/TG,XRD,SEM,FT-IR等表征方法,分析BNT的反应历程,煅烧温度对BNT成分、晶粒尺寸和压电性能的影响.结果表明,当微波煅烧温度为650℃时,可合成出高纯度BNT粉体(30~120 nm),其居里温度为394℃,d_(33)=7.5 pC/N,ε_(r)=535.58,tanδ=0.29.对比传统马弗炉煅烧sol-gel法,微波辅助sol-gel法有利于提高BNT的介电性能和居里温度,降低介质损耗.Bi_(0.5)Na_(0.5)TiO_(3)(BNT)particles were synthesized by a microwave-assisted sol-gel method.Characterization techniques such as DSC/TG,XRD,SEM,and FT-IR were employed to analyze the reaction process of BNT and the effects of calcination temperature on the composition,grain size,and piezoelectric properties of BNT.The results showed that high-purity BNT particles of 30 nm to 120 nm could be synthesized at a microwave calcination temperature of 650℃,with a Curie temperature of 394℃,a piezoelectric constant(d_(33))of 7.5 pC/N,a relative permittivity(ε_(r))of 535.58,and a dielectric loss(tanδ)of 0.29.Compared to the traditional muffle furnace calcination sol-gel method,the microwave-assisted sol-gel approach enhances the dielectric properties and Curie temperature of BNT,while reducing the dielectric loss.

关 键 词：钛酸铋钠 溶胶-凝胶(sol-gel)法 微波烧结 介电损耗 压电性能 

分 类 号：TB303[一般工业技术—材料科学与工程] TB34