Piezoelectric Polymer Films for Fuze Applications.
Final rept. 1 Sep 73-31 Dec 74,
NATIONAL BUREAU OF STANDARDS WASHINGTON D C ELECTRONIC TECHNOLOGY DIV
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Described is the development of polymer piezoelectric devices with sufficient electrical output in response to impact to demonstrate the feasibility of using polymer elements in place of ceramic elements in ordnance fuze systems. To satisfy this requirement, piezoelectric polymer elements have been constructed capable of providing at least 0.3 mJ into a 4-ohm load, in response to a force of 89 kN 10 tonsf. Total activities of up to 360 pCN have been achieved from elements built up from 30 sheets of 25-micrometers polyvinylidene fluoride. Test methods developed to characterize both single-sheet and total-element activities are described, as are poling procedures and details of element construction. Mathematical analyses of polymer piezoelectric output into resistive-capacitive loads are presented for static and dynamic cases. Experimental results and theoretical predictions are shown to be in agreement to within the 10 estimate of measurement accuracy. Author
- Electrical and Electronic Equipment
- Ammunition and Explosives