Accession Number:

ADA070822

Title:

Fabrication of Piezoelectric Polymer Film.

Descriptive Note:

Technical rept.,

Corporate Author:

NATIONAL BUREAU OF STANDARDS WASHINGTON DC POLYMER SCIENCE AND STANDARDS DIV

Report Date:

1978-09-01

Pagination or Media Count:

28.0

Abstract:

High values of pyroelectric and piezoelectric activity in fully electroded films of polyvinylidene fluoride were obtained by conventional non-corona poling at room temperature with sufficiently high fields. The avoidance of breakdown while obtaining high activity requires an understanding of the time dependence of both breakdown and activity. Time-to-breakdown as a function of field, and room temperature pyroelectric activity 7-14 days after poling at 23-12 deg C as a function of poling time and field were obtained for 25-micrometer biaxially stretched films with evaporated aluminum electrodes. The highest activities were obtained by poling at the highest fields and poling to breakdown. A pyroelectric activity of 36micro-CK sq m was measured two weeks after poling. The highest activity obtained with no apparent breakdown 31micro-CK sq m was measured a week after poling. These values are comparable with the highest that have been reported for this material using any poling temperature or using corona poling.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE