TiO_(2)微量掺杂对MgO-PSZ固体电解质性能的影响  

Droping effect of TiO_(2) on properties of MgO-PSZ solid electrolyt

作　　者：卢慧颖 孙侨阳 高昕宇 温天鹏 徐靖销 刘涛 LU Huiying;SUN Qiaoyang;GAO Xinyu;WEN Tianpeng;XU Jingxiao;LIU Tao(School of Metallurgy,Northeastern University,Shenyang 110819,China;Liaoning Key Laboratory of Metallurgical Sensor Materials and Technology,Northeastern University,Shenyang 110819,China;School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]东北大学冶金传感器材料与技术辽宁省重点实验室,沈阳110819 [3]东北大学机械工程与自动化学院,沈阳110819

出　　处：《功能材料》2022年第7期7001-7005,共5页Journal of Functional Materials

基　　金：国家自然科学基金项目(51974072);中央高校基本科研业务费专项资金项目(N2125028)。

摘　　要：以ZrO_(2)、MgO和微量TiO_(2)为原料,采用固相反应法合成了MgO部分稳定ZrO_(2)固体电解质(MgO-PSZ)。对合成试样进行XRD、SEM、致密度、电性能和抗热震性能等研究,考察TiO_(2)掺杂量对其性能的影响规律。结果表明,当TiO_(2)掺杂量为0.4%(摩尔分数)时其致密度达到95.13%;试样中四方相和立方相含量随TiO_(2)掺杂量的增加先增加后降低,最高达48%。当TiO_(2)掺杂量为0.2%时,试样离子电导率最大,测试温度为950℃时电导率达到4.71×10^(-3)S/cm;当TiO_(2)掺杂量为0.4%时,抗热震后的残余强度最大,为1400 MPa。Using ZrO_(2),MgO and trace TiO_(2) as raw materials,MgO partially stabilized ZrO_(2) solid electrolyte(MgO-PSZ)was synthesized by a solid-state method.XRD,SEM,densification,electrical properties and thermal shock resistance of the synthetic samples were analyzed to investigate the influence of TiO_(2) doping content on their properties.The results show that when the TiO_(2) content is 0.4 mol%,the densification reaches 95.13%.The content of tetragonal phase and cubic phase in the samples first increases and then decreases with the increase of TiO_(2) content,up to about 48%.When the TiO_(2) doping content is 0.2 mol%,the ionic conductivity of the sample reaches the maximum,and the conductivity was 4.71×10^(-3) S/cm at 950℃.When the TiO_(2) content is 0.4 mol%,the maximum residual strength after thermal shock resistance is 1400 MPa.

关 键 词：TiO_(2)微量掺杂 MgO-PSZ固体电解质 定氧技术 电导率 抗热震性 

分 类 号：TQ174.12[化学工程—陶瓷工业]