La0.9Sr0.1Ga0.8Mg0.2Ox(LSGM)粉体在1000～1500℃烧结4h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4h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4h样品物相单一,结晶良好,1000℃烧结4h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4h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.
参考文献
| [1] | Nguyen T L,Kobayashi K,Honda T,et al.Preparation and evaluation of doped ceria interlayer on supported stabilized zirconia electrolyte SOFCs by wet ceramic processes.Solid State Ionics,2004,174(1-4):163-174. |
| [2] | JIAN Jia-Wen,YANG Bang-Chao,ZHANG Yi-Kang.Aging characteristic of Pt/YSZ electrode structure.Journal of Inorganic Materials,2004,19(1):93-99. |
| [3] | Keqin Huang,Goodenough John B.A solid oxide fuel cell based on Sr-and Mg-doped LaGaO3 electrolyte:the role of a rare-earth oxide buffer.Journal of Alloys and Compounds,2000,303-304(1/2):454-464. |
| [4] | Ishihara T,Matsuda H,Takita Y.Doped LaGaO3 perovskite type oxide as a new oxide ionic conductor.J.Am.Chem.Soc.,1994,116(9):3801-3806. |
| [5] | Jacobson Allan J.Materials for solid oxide fuel cells.Chem.Mater.,2010,22(3):660-674. |
| [6] | Wan Jen-Hau,Yan J Q,Goodenough J B.LSGM-based solid oxide fuel cell with 1.4 W/cm2 power density and 30 day long-yerm stability.Electrochem.Soc.,2005,152(8):A1511-A1515. |
| [7] | Bi Zhonghe,Matsumoto Hiroshige,Ishihara Tatsumi.Solid-state amperometric CH4 sensor using LaGaO3-based electrolyte.Solid State Ionics,2008,179(27-32):1641-1644. |
| [8] | 衣宝廉.燃料电池——原理·技术·应用.北京:化学工业出版社,2003:448-459. |
| [9] | 王常珍.固体电解质和化学传感器.北京:冶金工业出版社,2000:33-38. |
| [10] | 刘荣辉.中温固体氧化物燃料电池材料制备及性能研究.昆明:昆明理工大学博士论文,2007. |
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