【作者】 丁玉石； 厉英； 王常珍；

【Author】 Ding Yushi,Li Ying~*,Wang Changzhen(School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China)

【机构】 东北大学材料与冶金学院；

【摘要】 采用固体电解质传感法测量铝在室温置放时氢的析出。测定了0～50℃下,LaF₃（CaF₂）、Ba₃Ca_1.18Nb_1.82O_9-δ（以下简称BCN18）和Y₂O₃稳定的ZrO₂固体电解质（以下简称YSZ）的电化学阻抗谱,并求出其电导率分别为1.73×10^-7～7.48×10^-7S·cm^-1、1.83×10^-8～1.21×10^-7S·cm^-1和1.39×10^-8～2.57×10^-7S·cm^-1。在0～50℃内,LaF₃（CaF₂）的阻抗谱规则;BCN18和YSZ电导率不高,但这两种固体电解质为缺陷固体,可催化电极反应,加速平衡,从而降低了该固体电解质的工作温度。使用三种固体电解质组装的传感器都可以测得PH₂-t曲线,其中LaF₃（CaF₂）传感器的响应时间较短为1.7min。更多还原

【Abstract】 Three kinds of hydrogen sensors were used for investigating hydrogen desorption in aluminum sample at room temperature. The measurement of LaF₃（CaF₂）,BCN18,and YSZ solid electrolytes by electrochemical impedance spectroscopy displayed that the conductivity of hydrogen ion were 1.73×10^-7～7.48×10^-7 S·cm^-1,1.83×10^-8～1.21×10^-7 S·cm^-1 and 1.39×10^-8～2.57×10^-7 S·cm^-1 for LaF₃（CaF₂）,BCN18 and YSZ solid electrolytes, respectively,at 0～50℃.The electrochemical imped- ance spectroscopy of LaF₃ displayed regular graphics at 0～50℃. The conductivities of BCN18 and YSZ were not high,as defect solids,the two kinds of solid electrolyte could catalyze electrode reaction so as to accelerate equilibrium and reduce the work temperature.All three kinds of hydrogen sensors could be used to measure the P_H2 -t plots of aluminum sample.The response time of LaF₃（CaF₂） was 1.7 min which was shorter then another.更多还原