添加过量Na_2CO_3对(Na_(0.5)Bi_(0.5))_(0.94)Ba_(0.06)TiO_3无铅压电陶瓷结构和电学性能的影响  

Effect of excess Na_2CO_3 on structure and electrical properties of(Na_(0.5)Bi_(0.5))_(0.94)Ba_(0.06)TiO_3 lead-free piezoelectric ceramics

作　　者：王婷[1] 陈晓明[1] 赵旭梅[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2015年第6期21-29,共9页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(51372147);中央高校基本科研业务费专项资金(GK201502005;GK201401003)

摘　　要：钛酸铋钠基陶瓷中含有易挥发性Na+,为研究Na+含量对钛酸铋钠基陶瓷结构和电学性能的影响,采用传统固相反应法制备了(Na0.5Bi0.5)0.94Ba0.06TiO3+xwt.%Na2CO3(记为BN6BTxNa,x=0、0.5、1、2)无铅压电陶瓷。研究了添加过量Na2CO3对(Na0.5Bi0.5)0.94Ba0.06TiO3陶瓷的烧结性能、晶体结构、显微结构、压电性能、介电性能和铁电性能的影响。发现在1 180℃烧结的陶瓷均具有纯钙钛矿结构,陶瓷的晶粒尺寸随Na2CO3含量不同而改变。钛酸铋钠基陶瓷的结构和电学性能与Na+含量密切相关。研究结果表明:1 180℃烧结的x=1组分陶瓷具有最大的体密度(5.73g/cm3),最大的压电常数(88pC/N),较高的剩余极化强度(25.5μC/cm2)和较低的矫顽场(27.5kV/cm)。The Na＋is volatile in（Na0.5Bi0.5）0.94Ba0.06TiO3-based ceramics.In order to find the effects of Na＋amount on structure and electrical properties of（Na0.5Bi0.5）0.94Ba0.06TiO3-based ceramics,（Na0.5Bi0.5）0.94Ba0.06TiO3＋xwt.%Na2CO3（BN6BT-xNa,x=0,0.5,1,2）lead-free ceramics were prepared via conventional solid state reaction method.Effect of excess Na2CO3 on sintering behavior,crystallite structure,microstructure,piezoelectric,dielectric and ferroelectric properties were studied.The ceramics sintered at 1 180℃ exhibit pure ABO3 perovskite structure.The size of grains in the ceramics varies with the the amount of Na＋.The structure and electrical properties of（Na0.5Bi0.5）0.94Ba0.06TiO3-based ceramics are tightly related to the Na＋amount.The ceramic with x=1sintered at 1 180 ℃ exhibits the highest bulk density（5.73g/cm3）,highest piezoelectric charge constant（88pC/N）,higher remanent polarization（25.5μC/cm2）and lower coercive field（27.5kV/cm）.

关 键 词：钛酸铋钠 无铅压电陶瓷 显微结构 电学性能 

分 类 号：O487[理学—固体物理]