The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 1986
Filed:
Dec. 21, 1984
Michael J Haun, State College, PA (US);
Robert E Newnham, State College, PA (US);
Walter A Schulze, Alfred Station, NY (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
Piezoelectric PZT-polymer composites of 1-3 and 1-3-0 connectivity are trversely reinforced with glass fibers to increase the hydrostatic piezoelectric charge and voltage coefficients (d.sub.h and g.sub.h) for possible use in hydrophone applications. These composites consisted of a foamed (with porosity) or non-foamed (no porosity) polymer matrix with PZT rods aligned parallel to the poling direction and glass fibers in the remaining two transverse directions. Because of the small percentage of PZT required, these composites have densities near that of water, and much lower dielectric constants than solid PZT, resulting in large increases in the hydrostatic piezoelectric voltage coefficient g.sub.h. By increasing the d.sub.h and g.sub.h coefficients, the d.sub.h g.sub.h product, used as the figure of merit, is greatly enhanced.