INVESTIGATIONS OF BOSWELLIA GLABRA ELECTRET

In this paper, the surface charge formation characteristics of thermoelectrets, prepared at different polarizing fields from a plant product, Boswellia Glabra, have been presented. A comparatively easy method for the fabrication of thermoelectrets of this meterial has been developed. The results obtained show that this plant product is a suitable material for electret preparation. Both the anode and cathode sides show the same sign of charge, without showing any charge reversal up to a polarizing field of 1000 V per mm thickness of the sample. The sample, prepared at zero field, indicates that the charge obtained with low-field samples is not due to the molding charge. The results also fail to find experimental conformation of Gross's and Gemant's hypothesis concerning the production of homocharge with regard to the cathode sides of the low-field Boswellia Glabra electrets. © 1969 The American Institute of Physics.