Taking into account the time-consuming trapping and detrapping of electric charge in insulating materials, a sequential protocol for the investigation the trapping sites and trapped charge stability is proposed. The method is demonstrated for Teflon FEP-A. Elemental peaks are obtained whose maxima shift with increasing field from 456 to 486 K and are characterized by activation energies that increase from 1.1 to 1.9 cV. The relaxation time of the trapped charge, at 523 K, increases as the amount of charge stored in the material decreases and explains the good charge stability for Teflon FEP-A electrets.
|Number of pages||3|
|Journal||Japanese Journal of Applied Physics, Part 2: Letters|
|Issue number||11 A|
|Publication status||Published - 1 Nov 2001|
- Charge stability
- Isothermal and nonisothermal techniques
- Trapping sites