Conductance and Loss Factor: A Study in (ZnO-PbCrO4) Mixed Material

Sachan, Dr. Meenu Singh (2014)
Journal of Engineering Computers & Applied Sciences
JObject, JObject
In this work the variation of conductance(G) and Loss factor (tan?) of (ZnO- PbCrO4) mixed material with composition, intensity of illumination, frequency a.c field and temperature have been studied. The mixed material of PbCrO4 and ZnO were prepared by heat treatment technique taking firing temperature 600?C for 35 minutes. The best result obtained with (75% ZnO-25% PbCrO4) composition .For measurement purpose the thick binder layer (cell) were fabricated in the form of parallel plates capacitor. Conductance (G) and Loss factor (tan?) of binder layer have been measured in frequency range (1kHz 40kHz) with intensity of illumination 1200 lux and temperature range 31?C to 77 ?C .The loss factor decreases with increasing frequency this is due to less space charge formation in a dielectric .The conductance in dark (GD) and in light (GI) decreases upto 40 ?C and then start increasing beyond that temperature is due to the contribution of frequency independent d.c conduction.

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