(1-x)(Na_(0.5)Bi_(0.5))_(0.94)Ba_(0.06)TiO_3-xSnO_2无铅压电陶瓷的结构调控及其电学性能研究
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摘要
采用固相合成法和常压烧结法制备了(1-x)(Na_(0.5)Bi_(0.5))_(0.94)Ba_(0.06)TiO_3-xSnO_2(BNBTS,x=0.00-0.04)粉体和陶瓷,采用XRD、SEM和电性能测试手段对BNBTS陶瓷结构、铁电性能、压电性能和介电性能进行了分析,结果发现,添加不同量的SnO_2的陶瓷样品都形成了单一的钙钛矿结构;SEM图片显示,随着Sn O_2的加入,晶粒尺寸减小,晶粒尺寸分布更均匀;电学性能测试结果表明,SnO_2的加入明显改变了BNBTS陶瓷的电学性能,随着x的增大,Pr先增大后减小,在x=0.03时,Pr达到最大值36.5μC/cm~2,但x在0.01到0.03之间变化时,剩余极化强度Pr变化不明显,而矫顽场Ec则呈减小趋势;压电常数d_(33)随着x的增大先增大后减小,在x=0.02时,达到最大值134μC/N;各样品具有典型铁电体所具有的"蝴蝶状"的双向应变曲线,随着SnO_2含量的增加,负向应变减小,正向应变变大。随着SnO_2的加入,BNBTS陶瓷的室温介电常数变大,并表现出弛豫特性,在x=0.03时BNBTS陶瓷室温下的介电常数达到最大值1143。
BNBTS lead free piezoelectric ceramics were prepared by the solid-phase reaction method.The effect of SnO_2 on the structure and electrical properties of the samples were studied by XRD,SEM and the method for electrical properties testing. The results showed that the dopant of SnO_2 did not change the perovsike structure,but decreased the lattice parameters;the SEM diagrams showed that the grain sizes of BNBTS ceramics decrease while their grain size distributions were more uniform with the addition of SnO_2. The ferroelectric properties have been affected with the dopant of SnO_2,the remnant polarization Pr increased firstly and then decreased,and the overall trend of coercive field Ec was downward,Pr attained the maximum values of 36.5 μC/cm~2 as x=0.03;the sample had the highest piezoelectric coeffiecient(d_(33)=134 pC/N)when x =0.02;all samples exhibited the typical ferroelectric behavior with butterfly shaped strain hysteresis loop,with the increase of SnO_2 content,the negative strain decreases and positive strain increases;the relative dielectric constants of BNBTS ceramics at room temperature increased,attained the peak value of 1143 as x = 0.03,and all BNBTS ceramics exhibit the typical relaxor behavior.
BNBTS lead free piezoelectric ceramics were prepared by the solid-phase reaction method.The effect of SnO_2 on the structure and electrical properties of the samples were studied by XRD,SEM and the method for electrical properties testing. The results showed that the dopant of SnO_2 did not change the perovsike structure,but decreased the lattice parameters;the SEM diagrams showed that the grain sizes of BNBTS ceramics decrease while their grain size distributions were more uniform with the addition of SnO_2. The ferroelectric properties have been affected with the dopant of SnO_2,the remnant polarization Pr increased firstly and then decreased,and the overall trend of coercive field Ec was downward,Pr attained the maximum values of 36.5 μC/cm~2 as x=0.03;the sample had the highest piezoelectric coeffiecient(d_(33)=134 pC/N)when x =0.02;all samples exhibited the typical ferroelectric behavior with butterfly shaped strain hysteresis loop,with the increase of SnO_2 content,the negative strain decreases and positive strain increases;the relative dielectric constants of BNBTS ceramics at room temperature increased,attained the peak value of 1143 as x = 0.03,and all BNBTS ceramics exhibit the typical relaxor behavior.
引文
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[11]LiangliangLi,JigongHao,RuiqingChu,ZhijunXu,WeiLi,JuanDu,PengFu,Dielectric,ferroelectric and field-induced strain response of lead-free(Fe,Sb)-modified(Bi0.5Na0.5)0.935Ba0.065TiO3ceramics[J].Ceramics International,2016,42(8):9419-9425.
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[2]Peng Fu,Zhijun Xu,Ruiqing Chu,Xueyan Wu,Wei Li,Xiaodong Li,Structure and electrical properties of(1-x)(Na0.5Bi0.5)0.94Ba0.06Ti O3-x BiAlO3lead-free piezoelectric ceramics[J].Materials and Design 2013,46:322-327.
[3]Peng Fu,Zhijun Xu,Ruiqing Chu,Xueyan Wu,Wei Li,Meiju Zhao,Structure and electrical properties of(1-x)(Bi0.5(Na0.82K0.18)0.5)TiO3-x Bi AlO3lead-free piezoelectric ceramics[J].Journal of Alloys and Compounds 2012,535:5-9.
[4]Peng Fu,Zhijun Xu,Ruiqing Chu,Wei Li,Xueyan Wu,Meiju Zhao,Structure and electrical properties of(Bi0.5Na0.5)0.94Ba0.06TiO3-Bi0.5(Na0.82K0.18)0.5TiO3-Bi AlO3lead free piezoelectric ceramics[J].Materials Chemistry and Physics2013,138:140-145.
[5]Ting Wang,Xiao-ming Chen,Yan-zi Qiu,Han-li Lian,Wei-ting Chen,Microstructure and electrical properties of(1-x)[0.8Bi0.5Na0.5TiO3-0.2Bi0.5K0.5TiO3]-x BiCoO3leadfree ceramics[J].Materials Chemistry and Physics,2017,186:407-414.
[6]Feng Liu,Olivia Wahyudi,Yiqing Lu,Yongxiang Li,A new Na0.5Bi0.5TiO3based lead-free piezoelectric system with calculated end-member Bi(Zn0.5Zr0.5)O3[J].Ceramics International,2015,41:S31-S36.
[7]Ying-Chieh Lee,Tai-Kuang Lee,Jhen-Hau Jan,Piezoelectric properties and microstructures of ZnO-doped Bi0.5Na0.5TiO3ceramics[J].Journal of the European Ceramic Society,2011,31:3145-3152.
[8]D.E.JainRuth,S.M.AbdulKader,M.Muneeswaran,N.V.Giridharan,D.Pathinettam Padiyan,B.Sundarakannana,Structural and electrical properties of(1-x)(Na0.5Bi0.5)TiO3-x Bi(Mg0.5Zr0.5)O3lead-free piezoelectric ceramics[J].Ceramics International,2016,42:3330-3337.
[9]Renfei Cheng,Lunan Zhu,Yalong Zhu,Zhijun Xu,Ruiqing Chu,Huaiyong Li,Giant piezoelectricity and ultrahigh strain response in bismuth sodium Titanate lead-free ceramics[J].Materials Letters,2016,165:143-146.
[10]陈维鑫,孙力,牛建,刘青梅,陶玲玲,付鹏,(Na0.5Bi0.5)0.94Ba0.06Ti1-xZrxO3(x=0-0.05)压电陶瓷的制备及其电学性能研究[J].聊城大学学报(自然科学版),2018,31(3):31-37.
[11]LiangliangLi,JigongHao,RuiqingChu,ZhijunXu,WeiLi,JuanDu,PengFu,Dielectric,ferroelectric and field-induced strain response of lead-free(Fe,Sb)-modified(Bi0.5Na0.5)0.935Ba0.065TiO3ceramics[J].Ceramics International,2016,42(8):9419-9425.
[12]Cheng R F,Xu Z J,Chu R Q,et al.,Electric fieldinduced ultrahigh strain and large piezoelectric effect in BiNaTiO3-based lead-free piezoceramics[J].Journal of the European Ceramics Society,2016,36(3):489-496.