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Comparison and electrical modeling of new polymeric cellular electrets
Gian Carlo Montanari1, Giovanni Mazzanti, Fabio Ciani
1DIE-LIMAT, University of Bologna, Italy.
Summary
New cellular polymers exhibit thermal stability and piezoelectric properties. Understanding their contact charging mechanisms, including partial discharge and space charge, is key to optimizing electret performance for advanced applications.
Area of Science:
- Materials Science
- Polymer Science
- Electrical Engineering
Background:
- A novel family of cellular polymers with significant thermal stability has been developed.
- These polymers exhibit promising piezoelectric properties after electrical charging, forming electrets under high electric fields.
Purpose of the Study:
- To investigate the contact charging mechanisms of these new cellular polymers.
- To understand the relationship between partial discharge, space charge formation, and electret properties.
- To provide insights for optimizing material manufacturing for enhanced electret and piezoelectric characteristics.
Main Methods:
- Analysis of partial discharge inception and space charge accumulation thresholds.
- Modeling of avalanche phenomena within material cavities.
- Evaluation of charge generation rates during contact charging.
Main Results:
- Established a link between partial discharge and space charge formation during contact charging.
- Investigated the time and temperature stability of the electret properties.
- Identified key parameters influencing charging mechanisms.
Conclusions:
- Contact charging mechanisms, including partial discharge and space charge dynamics, are crucial for optimizing the piezoelectric and electret properties of these thermally stable cellular polymers.
- The findings offer valuable guidance for the manufacturing process to enhance material performance.