期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 147, 期 11, 页码 4363-4367出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1394070
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A composite Na+ conductor of polycrystalline NASICON mixed with glassy Na2O-Al2O3-4SiO(2) (40 wt%) was investigated and used for a Cl-2 gas sensor. The densification of the solid electrolyte was improved by the addition of the glassy material. The sensor probe using the composite electrolyte and RuO2 + NaCl (1:1) measuring electrode produced a rapid electromotive force (EMF) change for the Cl-2 gas concentration below 10 ppm at above 450 degreesC. For the low temperature of 400 degreesC, a slow EMF response was obtained due to the side reaction between the Cl-2, gas and Na2O on the solid electrolyte and/or slow Cl-2, reduction to Cl- ion on the electrode. This sensor EMF value in air was only slightly influenced by the changing of the O-2 or CO2 gas concentration. (C) 2000 The Electrochemical Society. S0013-4651(00)04-083-0. All nights reserved.
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