Preliminary studies of Mn_(x)Zn_(2−x)FeO₄ (x = 0 dan 0.1) thick film semiconductors as an ethanol gas sensor

Preliminary studies about fabrication of Mn_(x)Zn_(2-x)FeO₄ (x = 0 dan 0.1) had been done to identify the effect of adding Mn₂O₃ 10%mol towards gas sensor sensitivity. Gas sensor ceramics that fabricated through local nature mineral-based is Yarosite mineral. The fabrication of Mn_(x)Zn_(2-x)FeO₄ thick film semiconductor by using Screen Printing method and firing at temperature 800 °C for 2 hours. Through electrical properties test it is known that the adding of Mn₂O₃ materials made semiconductor thick film faster to response ethanol gases rather than without Mn₂O₃ materials. Thick film Mn_0.1Zn_1.9FeO₄ has lower operating temperature and higher conductivity than Zn₂FeO₄ thick film. Electrical resistance test indicated that by adding Mn₂O₃ 10%mol, it is sufficiently effective to obtain new properties of Mn_0.1Zn_1.9FeO₄ thick film and it can be used as ethanol gas sensor. (paper)