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Compositional modifications in humidity sensing MgAl2O4 ceramics

2004-01-01
Cambaz, G
Timucin, M
The MgAl2O4 powders were synthesized using the mixed oxide technique. The powders were doped with Na+ ion to modify the sintering behavior and the response characteristics of the spinel ceramics. The variations in electrical impedance were determined at room temperature under relative humidity (RH) values ranging from 21 to 98%. The effect of Na2O addition and sintering temperature on the microstructure and humidity sensitivity of MgAl2O4 were investigated.