Humidity Sensitive Characteristics of Porous Li-Mg-Ti-O-F Ceramic Materials

Abstract

Ceramic porous MgTiO 3 materials have been prepared by classical solid-state route. The sintered pellets of MgTiO 3 with different LiF contents were characterized for humidity-sensing application. The sintered disks of these mixtures were subjected to capacitance measurements at 20˚C as function of the relative humidity from which revealed that the Mixture MgTiO 3 + 2% LiF (w/w) has the better characteristics. The disks were subjected to DC resistance measure-ments as a function of relative humidity in the range 15% -95% RH. The selectivity of this material was discussed and compared to commercial sensor results. The response and recovery characteristics were assessed.