无铅压电陶瓷钛酸铋钠驰豫铁电性  

Relaxation Properties of Lead-free Piezoelectric Ceramics Sodium Bismuth Titanate

作　　者：张寅[1] 

机构地区：[1]齐鲁师范学院科研处,山东济南250013

出　　处：《齐鲁师范学院学报》2012年第5期33-37,共5页Journal of Qilu Normal University

摘　　要：金属氧化物沉积法(MOD)成功地制备了Bi1/2Na1/2TiO3(NBT)基无铅压电陶瓷,样品的X射线衍射(XRD)结果显示其具有较好的结晶性,通过介电温度谱和介电弥散性指数δ、介电临界指数γ和频率色散度△Tm对样品的驰豫性质进行了定量研究,结果表明,NBT是一种A位取代的驰豫铁电体,它具有钙钛矿结构,以及极其复杂的相变过程,在一定的温度范围内可以得到三方和四方共存的准同型相界区。Sodium Bismuth Titanate Ceramics were synthesized by Metalorganic Decomposition Method （MOD）. The result of X - ray diffraction （XRD） patterns showed the samples with good orientation and perovskite structure. We have used dielectric measure- ment and quantity method of 8, 3,and ATm to analysis relaxor behavior of NBT. The result showed that NBT is A -site substituted relaxor ferroelectrics with perovskite structure and complex phase transition process. Morphotropic phase boundary with rhombohed- ral phase and tetragonal phase together exists in a certain temperature range .

关 键 词：钛酸铋钠 驰豫铁电体 准同型相界 

分 类 号：TM282[一般工业技术—材料科学与工程]