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

Ahmad Kassas, Jérôme Bernard, Céline Lelièvre, David Houivet, Hassan Lakiss, Tayssir Hamieh

Faculty of Engineering, Lebanese University, Beirut, Lebanon.
Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA/CHAMSI), Doctoral School of Sciences and Technology (EDST), Faculty of Agricultural Engineering and Veterinary Medicine and Faculty of Sciences, Lebanese University, Beirut, Lebanon.
LUSAC (EA4253), Site Universitaire, Cherbourg-Octeville, France.

DOI: 10.4236/ajac.2013.42011                

Abstract

Ceramic porous MgTiO₃ materials have been prepared by classical solid-state route. The sintered pellets of MgTiO₃ with different LiF contents were characterized for humidity-sensing application. The sintered disks of these mixtures were subjected to capacitance measurements at 20℃as function of the relative humidity from which revealed that the Mixture MgTiO₃ + 2% LiF (w/w) has the better characteristics. The disks were subjected to DC resistance measurements 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.

Keywords

Ceramic Humidity Sensor; Magnesium Titanate; Li₂MgTiO₄; Capacitance; Resistance

Conflicts of Interest

The authors declare no conflicts of interest.

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