Solid Electrolyte Type Ammonia Gas Sensor with High Water Durability

摘要

Highly water durable ammonia gas sensor was fabricated by the combination of Al~(3+) ion conducting (Al_(0.2)Zr_(0.8))_(20/19)Nb(PO_4)_3 solid electrolyte and NH_4~+-β-gallate (NH_4~+-Ga_(11)O_(17) auxiliary sensing electrode, and its NH_3 gas sensing performance was investigated in humid atmospheres. The present sensor showed an advanced sensing performance of continuous, quantitative and reproducible response which obeys the theoretical Nernst relationship even in a highly humidified condition containing 4.2 vol% H_2O at 230 ℃.