NaCl/Na2CO3对BaZr0.8Y0.2O3-δ/ZnO质子导体陶瓷的烧结性能和电导率的影响  

Effects of NaCl/Na2CO3 on sintering performance and electrical conductivity of BaZr0.8Y0.2O3-δ/ZnO proton conducting ceramic

作　　者：罗先游 赵梦媛 解昊 边凌锋 杨星 孟彬[1] LUO Xian-you;ZHAO Meng-yuan;XIE Hao;BIAN Ling-feng;YANG Xing;MENG Bin(Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院

出　　处：《中国有色金属学报》2019年第11期2572-2581,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51462018);云南省大学生创新创业计划项目(20170674203)~~

摘　　要：拟通过添加烧结助剂(ZnO)和钠盐(NaCl/Na2CO3)来改善BaZr0.8Y0.2O3-δ质子导体陶瓷的烧结性能和电导率。采用机械球磨混合结合高温常压烧结工艺制备BaZr0.8Y0.2O3-δ-ZnO-NaCl/Na2CO3质子导体陶瓷,利用XRD、SEM、EDS和EIS等手段对烧结陶瓷的物相、微观形貌、化学组成和电学性能进行测试表征。结果表明:当烧结工艺为1450℃烧结保温6 h且ZnO添加量达到2%(摩尔分数)时,BZY-2%ZnO陶瓷的致密度和线收缩率分别为95.25%和16.76%,其晶粒尺寸大小约0.8~1μm。当烧结工艺为1400℃烧结保温4 h且NaCl和Na2CO3添加量分别为5%时,BZY-2%ZnO-5%NaCl和BZY-2%ZnO-5%Na2CO3陶瓷的致密度分别为96.71%和97.47%,线收缩率分别为17.89%和19.78%。在湿润空气中,当测试温度为700℃时,BZY-2%ZnO-10%Na2CO3和BZY-2%ZnO-10%NaCl陶瓷的电导率分别为3.124×10^-3 S/cm和2.505×10^-3 S/cm,而未添加NaCl和Na2CO3的BZY-2%ZnO陶瓷的电导率仅为1.292×10^-3 S/cm。添加NaCl和Na2CO3可以提高BZY-2%ZnO陶瓷的烧结性能和电导率。The sintering properties and electrical conductivity of BaZr0.8Y0.2O3-δproton conducting ceramic can improve by adding sintering aids(ZnO)and sodium salts(NaCl/Na2CO3).The BaZr0.8Y0.2O3-δ-ZnO-NaCl/Na2CO3 proton conducting ceramic was prepared by mechanical ball milling combined with high temperature sintering in air atmosphere.The phase,micro-morphology,chemical composition and electrical properties of the sintered ceramics were characterized by XRD,SEM,EDS and EIS,respectively.The results show that,when the sintering process is 1450℃for 6 h and the content of ZnO addition reaches 2%(mole fraction),the relative density and linear shrinkage of BZY-2%ZnO ceramic are 95.25%and 16.76%,respectively,and the grains in the sizes of approximately 0.8-1μm.When the sintering process is 1400℃for 4 h and the content of NaCl and Na2CO3 addition are 5%,respectively,the relative densities of BZY-2%ZnO-5%NaCl and BZY-2%ZnO-5%Na2CO3 ceramics are 96.71%and 97.47%,the linear shrinkages are 17.89%and 19.78%,respectively.In moist air,when the measurement temperature is 700℃,the electrical conductivity of BZY-2%ZnO-10%Na2CO3 and BZY-2%ZnO-10%NaCl ceramics are 3.124×10^-3 S/cm and 2.505×10^-3 S/cm,respectively,while that of BZY-2%ZnO ceramic without NaCl and Na2CO3 addition is only 1.292×10^-3 S/cm.The addition of NaCl and Na2CO3 can enhance the sintering properties and electrical conductivity of BZY-2%ZnO ceramic.

关 键 词：BaZr0.8Y0.2O3-δ陶瓷 ZNO NaCl/Na2CO3 质子导体 烧结性能 电导率 

分 类 号：TB34[一般工业技术—材料科学与工程]