THE OPERATING TEMPERATURE LOWERING FOR CO2 GAS SENSOR WITH A LITHIUM CONDUCTING SOLID ELECTROLYTE

The lowering of the operating temperature for the CO2 gas sensor with the lithium conducting solid electrolyte was examined by applying a ductile solid of a Li2CO3+Li2O mixture or a Li2CO3-K2CO3-Na2CO3 eutectic. In the case of the eutectic solid, the CO2 sensor can detect the gas content precisely from 100 ppm to 1% at as low a temperature as 350-degrees-C. The ductilities of the solid greatly enhanced the reactivity between Li2CO3 in the eutectic and the CO2 gas in the atmosphere.