Fabrication and Sensing Properties of NASICON Thick Film SO 2 Gas Sensor Using Screen-print Method

The thick film type sensor having Pt/Na Super Ionic Conductor(NASICON) solid electrolyte/Pt//Pt catalyst system for gas was fabricated by screen-print method. The phase of Na Super Ionic Conductor solid electrolyte sintered at different temperature of 1050, 1150, and for different time of 1.5, 2.5, 3.5 hr were investigated by XRD. The Electromotive Force variation of the sensor with concentrations and operating temperatures were investigated. The major phase of Na Super Ionic Conductor film sintered at 115 for 3.5 hr was sodium zirconium silicon phosphate(ZrPO). The Nernst`s slope of Na Super Ionic Conductor sensor for gas with the variation of concentration from 10 to 100 ppm was 167.14 ㎷/decade at the operating temperature of . The increase of oxygen partial pressure was not affected to the variation of Nernst`s slope.e.