Abstract
The resinous substance oozing from the bark of the tree Vateria Indica is found to be a good thermoelectret material, with considerable remnant surface charges which remain hetero in nature throughout. A unique feature of this resin is that no charge reversal is observed, even when the polarizing field is about 40 kV. Near the melting temperature, this amorphous material is polarized by application of an electric field, even for the very short time of 30 min. The slower the rate of cooling, the greater is the charge retention observed. Even with no polarizing field, some moulding charges are observed, but these are small in magnitude and decay very quickly.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
