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采用NASICON(Na离子导体)与BaCO_3-Li_2CO_3电极相结合的方式,使新型CO_2传感器得到发展。据观察,其响应时间以及抗水湿性能都有了提高。对于CO_2浓度在1×10~(-4)～0.5这样宽的范围内,500℃时测得的电动势与能斯特方程符合的很好。该元件几乎不受共存的H_2S(10~(-4)),NO_2(10~(-4)),CO(10~(-4)),SO_2(10~(-4)),C_2H_5OH(10~(-4))、CH_4(5×10~(-3))以及NH_3(2×10~(-3))的影响。
The combination of NASICON (Na ion conductor) and BaCO_3-Li_2CO_3 electrode has been applied to develop the new CO_2 sensor. It has been observed that both the response time and the resistance to water wetting have been improved. For a CO 2 concentration ranging from 1 × 10 -4 to 0.5, the emf measured at 500 ° C is in good agreement with the Nernst equation. The component is hardly affected by the coexistence of H 2 S (10 -4), NO 2 (10 -4), CO (10 -4), SO 2 (10 -4), C 2 H 5 O ~ (-4)), CH_4 (5 × 10 ~ (-3)) and NH_3 (2 × 10 ~ (-3)).