Fabrication Method for Unoriented Phase I PVF2.

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Abstract:

Fabrication of unoriented phase I crystalline PVF2 is described wherein commercially available PVF2 phase II crystalline form is placed in a high pressure cell and its temperature is raised slightly over its melting point. The sample is then subjected to abrupt changes in high pressure and the temperature is dropped thereafter. The pressure is then reduced resulting in a product which contains both phase I and phase II forms of PVF2. The phase I content of the product varies from a few percent and up depending upon the pressure applied during the quenching step. Author

Author(s):
Pae, K. D. ; Newman, B. A. ; Scheinbein, J. I.
Author Organization(s):
DEPARTMENT OF THE NAVY WASHINGTON DC
Descriptive Note:
Patent Application,
Pagination:
0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Availability: This Government-owned Invention Available For U.s. Licensing And, Possibly, For Foreign Licensing. Copy Of Application Available Ntis.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-200 172
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Patent applications, *Piezoelectric crystals, *Polyvinylidenes, *Chlorides, *Crystallization, Fabrication, Crystal structure, Quenching, Piezoelectric transducers
Field(s)/Group(s):
Crystallography
Keyword(s):
Pressure quenching, Phase one structure
Report Date:
1981 Oct 24