BaTiO_3-Na_(0.5)Bi_(0.5)TiO_3无铅PTCR陶瓷研究  

Research of BaTiO_3-Na_(0.5)Bi_(0.5)TiO_3 Lead-Free PTCR Ceramics

作　　者：韦继锋[1] 蒲永平[1] 王瑾菲[1] 杨公安[1] 

机构地区：[1]陕西科技大学,陕西西安710021

出　　处：《稀有金属材料与工程》2009年第A02期249-251,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50607013);教育部科学技术研究重点项目(209126);陕西科技大学研究生创新基金

摘　　要：以BaTiO3-Na0.5Bi0.5TiO3(BT-NBT)陶瓷系统为研究对象,采用固相法制备了(1-x)BT+xNBT(0.01<x<0.06)系统陶瓷。通过DSC、XRD、SEM等分析手段研究了NBT的加入量以及烧成气氛对BaTiO3基PTCR陶瓷的显微结构及阻温特性的影响。研究结果表明:加入低含量(x<0.03)NBT时,能明显提高烧成陶瓷的居里温度(Tc),当加入x=0.01NBT时,Tc提高到150℃。氮气中烧成的陶瓷室温电阻率低于空气中烧成的,但其PTC效应减弱。Lead free PTCR ceramics based on BaTiO3-Na0.5Bi0.5TiO3（BT-NBT） system were prepared by a solid state reaction method. By DSC, XRD, SEM and other analytical instrument, the effect of the amount of additive NBT and sintering atmosphere on microstructure and resistance-temperature properties of the PTC ceramic was investigated. The results indicated that the Curie temperature （Tc） was increased evidently with the additive NBT when x〈0.03. Tc could be enhanced to 150 ℃ when adding x=0.01 NBT. The room temperature resistivity of the sample sintered in air was obviously higher than that sintered in nitrogen; however, the PTC effect of the sample sintered in nitrogen was bated.

关 键 词：BATIO3陶瓷 无铅 阻温特性 PTC效应 

分 类 号：TQ174.1[化学工程—陶瓷工业]