La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_x固体电解质材料敏感电学特性的研究  

Research on the Sensitive Electric Properties of La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_x Electrolyte

作　　者：顾媛媛[1] 陈康[1] 江浩[1] 简家文[1] 

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《无机材料学报》2013年第4期409-414,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(60971047);中国博士后科学基金(20100470735;2010-2012)~~

摘　　要：La0.9Sr0.1Ga0.8Mg0.2Ox(LSGM)粉体在1000-1500℃烧结4 h得到不同LSGM样品,对各样品进行了各项物理和电学特性测试。结果表明,样品的线收缩率和相对密度随烧结温度的升高而增加,1500℃烧结4 h的样品达到最大的线收缩率和相对密度,分别为24.8%和97%。1250-1500℃烧结4 h样品物相单一,结晶良好,1000℃烧结4 h的样品则存在较多杂相。各样品的电导率随测试温度升高而增大,1400℃烧结4 h的样品在各测试温度下都具有最大的电导率,800℃时,其电导率约为0.093 S/cm。在此研究基础上,采用丝网印刷技术制备了基于LSGM的小孔扩散型极限电流氧传感器,并测得其I-V特性曲线和时间响应特性。结果显示,该传感器的I-V曲线存在较好的极限电流平台,且极限电流和氧浓度之间存在良好的线性关系。响应和恢复时间较短,分别为10-15 s和15-20 s,重复性较好。La0.9Sr0.1Ga0.8Mg0.2Ox（LSGM） electrolytes were prepared from La0.9Sr0.1Ga0.8Mg0.2 Oxpowders sintering at 1000-1500℃ for 4 h.Both the physical and electrical properties of the LSGM samples were tested.The results show that the linear shrinkage and relative density of the samples increase with sintering temperature rising,besides,the sample sintered at 1400℃ for 4 h shows the maximum value of 24.8% and 97%,respectively.Samples sintered at 1250℃-1500℃ for 4 h have uniform phase while that sintered at 1000℃ has a large amount of impurities.The sample sintered at 1400℃ for 4 h has the largest conductivity being 0.093 S/cm at 800℃.Based on this,a limiting-current-type O2 sensor based on LSGM was fabricated by screen-printing technique,and the I-V characteristics and response/recovery time were measured.It shows that the I-V curves have good current plateaus,and the limiting current exhibits a linear dependence on oxygen concentration.The response/recovery time are 10-15 s and 15-20 s,respectively,showing well reproducible response characteristics.

关 键 词：LSGM 电导率 固体电解质 氧传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]