LaBMnO_3-ZrO_2复合极限电流型氧传感器的制备与性能  

PREPARATION AND PERFORMANCE OF LaBMnO_3-ZrO_2 COMPOSITE LIMITING CURRENT OXYGEN SENSORS

作　　者：丁磊[1] 贾鹏鹏[1] 季惠明[1] 谢贵久[1] 徐廷献[1] 

机构地区：[1]天津大学材料学院,先进陶瓷与加工技术教育部重点实验室,天津300072

出　　处：《硅酸盐学报》2009年第9期1480-1484,共5页Journal of The Chinese Ceramic Society

摘　　要：采用高温固相反应法制备了电导率为10-1S/cm数量级的LaBMnO3(B=Ca,Sr,Ba)致密扩散障混合导体陶瓷。用化学共沉淀法制备了高温电导率为10-2S/cm数量级的氧化钇稳定氧化锆(yttria stabilized zirconia,YSZ)固体电解质陶瓷。用瓷片复合工艺将致密扩散障陶瓷与YSZ陶瓷复合,制备出了致密扩散障极限电流型氧传感器。对该传感器进行氧敏性能测试,结果表明:以LaBMnO3为致密扩散障碍层、YSZ为固体电解质的极限电流型氧传感器,在体积分数为0～21%氧含量范围内,均能获得较好的极限电流平台,电流最大值达到12mA;出现极限电流平台的电压区间为0.6～1V;氧含量与极限电流呈指数对应关系,反应时间约10s。此传感器制备工艺简单、过程可控,为该传感器的理论与应用研究打下了基础。The LaBMnO3（B = Ca,Sr,Ba） dense diffusion barrier mixed-conducting ceramics with conductivity in the order of 10^–1 S/cm were prepared by the high temperature solid state reaction method,and yttria stabilized zirconia（YSZ） solid electrolyte ceramics with high temperature conductivity in the order of 10^–2 S/cm were prepared by the chemical coprecipitation method. The dense diffusion barrier limiting current oxygen sensors were obtained by combining the dense diffusion barrier ceramics and the YSZ ceramics via the ceramic compounding technique. The oxygen gas sensitive testing results show that the limiting current oxygen sensors with LaBMnO3 as dense diffusion barrier and YSZ ceramics as solid electrolyte can provide good limiting current platforms when the oxygen volume fraction is between 0 and 21%, and the maximum current can reach 12 mA. The relationship of oxygen content and limiting current is an exponential function and the response time is about 10 s when the direct current voltage applied between 0.6V and 1 V. The technique for preparing the sensor is simple and the fabricating process is controlled. The research result provides a basis for the theoretical and applied reference of this sensor.

关 键 词：氧传感器 极限电流 制备与性能 致密扩散障碍层 固体电解质 

分 类 号：O482.3[理学—固体物理]