不同施主掺杂对BaTiO_3-Bi_(0.5)Na_(0.5)TiO_3-CaTiO_3陶瓷电学性能的影响  

Influences of different Donor Dopant on the Electrical Properties of BaTiO_3-Bi_(0.5)Na_(0.5)TiO_3-CaTiO_3 Ceramics

作　　者：冷森林 杨琴芳[1] 龙禹[1] 宋谋胜[1] 

机构地区：[1]铜仁学院材料与化学工程学院,贵州铜仁554300

出　　处：《广东化工》2016年第19期23-24,共2页Guangdong Chemical Industry

基　　金：贵州省教育厅创新团队(黔教合人才团队字[2014]40)

摘　　要：以BaCO_3,Na_2CO_3,TiO_2,Bi_2O_3,Y_2O_3,Nb_2O_5,La_2O_3为原材料,在氩气气氛中采取固相反应法合成新型高温无铅(95-x)mol%BaTiO_3-xmol%Bi_(0.5)Na_(0.5)TiO_3-5mol%CaTiO_3((95-x)BT-x BNT-5CT,x=8,15)PTCR(Positive Temperature Coefficient of Resistance)陶瓷。研究不同施主(La,Y,Nb)掺杂对高温无铅(95-x)BT-x BNT-5CT材料的PTCR电学性能的影响。实验结果表明不同施主掺杂的BT-BNT-CT样品都有明显的正温度系数电阻效应,即PTC效应,其中Y和Nb掺杂的样品的整体性能最好。同时还研究了BNT含量分别为8%和15%对材料电学性能和居里温度的影响,实验结果得出,BNT的含量越高,材料的居里温度越高,但材料的半导化越困难。High temperature lead-free（95-x）mol%BaTiO3-xmol%Bi0.5Na0.5TiO3-5mol%CaTiO3（（95-x）BT-x BNT-5CT, x=8, 15） PTCR（Positive Temperature Coefficient of Resistance） ceramics were prepared by solid phase reaction sintering at Ar atmosphere using Ba CO3, Na2CO3, TiO2, Bi2O3,Y2O3, Nb2O5, La2O3 as raw materials. The influences of different donor（La, Y, Nb） dopant on the electrical properties of high temperature lead-free（95-x）BT-x BNT-5CT ceramics was studied. The experimental results indicated that all the samples had the obvious PTC effect, and the Y and Nb doped samples had the optimal performance. At the same time, the influences of the Bi0.5Na0.5TiO3 content（8 %, 15 %） on the electrical properties and curie temperature of ceramics were also studied. It was showed that as the content of BNT increased, the sample has higher Tc, and is more difficult to change to semiconductor.

关 键 词：施主掺杂 高温 无铅 电学性能 

分 类 号：TQ[化学工程]