Humidity sensing properties of ferrite based Al-Cd nanoparticles as a fast response sensor device

The humidity sensing performance of Al-Cd ferrite nanoparticle manufactured by chemical co-precipitation method. The humidity sensing properties of the presented Al-Cd ferrite sensor was investigated by exposing it to a broad humidity range of 15-90% at room temperature. The humidity sensing properties of the sample was tested by impedance measurements by varying the relative humidity from 15 to 95%. According to the investigation, samples impedance decreases sharply, it has an acceptable sensitivity, quick response and recovery time, a narrow hysteresis and good long term stability. Also its dependence of complex impedance spectra, measured on the relative humidity, operating temperature and on the measuring frequency is shown and explained.