溶胶–凝胶法制备BNBT系陶瓷的热释电性能  

Pyroelectric Properties of (Bi_(0.5)Na_(0.5))_(1-x)Ba_xTiO_3 Lead-free Ceramics by Sol-gel Method

作　　者：赵明磊[1] 王渊旭[1] 王晓颖[1] 王春雷[1] 张家良[1] 王矜奉[1] 姜悦彬[2] 

机构地区：[1]山东大学物理与微电子学院,山东济南250100 [2]山东大学工程训练中心,山东济南250100

出　　处：《电子元件与材料》2004年第11期28-29,33,共3页Electronic Components And Materials

摘　　要：研究了采用溶胶–凝胶工艺制备的(Bi0.5Na0.5)1xBaxTiO3(x=0,0.06,0.08)系(简称BNBT)无铅压电陶瓷的热释电性能。研究发现该工艺制备的(Bi0.5Na0.5)1xBaxTiO3系陶瓷室温附近具有较强的热释电性,热释电系数P大大高于传统工艺制备的同种样品的性能。随着Ba离子浓度的增加,热释电系数P在x=0.06时达到最大,P为3.9104 Cm2·K1。溶胶–凝胶工艺制备的(Bi0.5Na0.5)1xBaxTiO3系陶瓷具有较大热释电系数,起因于该类材料压电性较强、退极化温度较低。The pyroelectric properties of (Bi0.5Na0.5)1xBaxTiO3 (x=0, 0.06, 0.08) ceramics prepared by sol-gel method were investigated. These ceramics showed enhanced pyroelectric coefficient than those prepared by conventional synthesized method. The (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramic showed the largest pyroelectric coefficient P=3.9104Cm2·K1 at room-temperature in this system. The increased piezoelectric constant and decreased depolarization temperature can explain the large pyroelectric coefficient of these materials.

关 键 词：无机非金属材料 无铅压电陶瓷 溶胶-凝胶 热释电性能 

分 类 号：TM282[一般工业技术—材料科学与工程] TM221[电气工程—电工理论与新技术]