Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第11期    总第248期    2019年11月

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文章编号:1004-0609(2019)-11-2572-10
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
罗先游,赵梦媛,解 昊,边凌锋,杨 星,孟 彬

(昆明理工大学 材料科学与工程学院,昆明 650093)

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0.8~1 μm。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。

 

关键字: BaZr0.8Y0.2O3-δ陶瓷;ZnO;NaCl/Na2CO3;质子导体;烧结性能;电导率

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

Abstract:The sintering properties and electrical conductivity of BaZr0.8Y0.2O3-δ proton 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 0.8-1 μm. 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.

 

Key words: BaZr0.8Y0.2O3-δ ceramic; ZnO; NaCl/Na2CO3; proton conductor; sintering performance; electrical conductivity

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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