Fabrication and ethanol gas sensing characteristics of the thick film ethanol gas sensors

-based thick film ethanol gas sensors were fabricated on alumina substrates and their ethanol gas sensing characteristics were investigated. The film sintered at for 2 hrs. showed the highest sensitivity to ethanol gas and the sensitivity of the film to 1000 ppm ethanol gas in air was 97 % at an operating temperature of . The addition of to enhanced the sensitivity by changing the type and number of surface acidic/basic sites.