US4412148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PZT Composite and a fabrication method thereof
Assignee: United States Department of the Navy
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Filing: 1981-04-24
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Granted: 1983-10-25
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Expires: 2001-04-24
Abstract
Abstract A composite of PZT (Lead Zirconate Titanate) and a compliant polymer matrixaving 3-1 connectivity (i.e., in a diphasic material, one of the two phases is continuously self-connected in all three mutually perpendicular directions and the second phase is self-connected only along one of the three mutually perpendicular directions) and fabrication method thereof is described. An array of parallel PZT rod elements is embedded in a mechanically compliant polymer matrix with their axes along the direction of the poling electric field. Such a composite has a high value of g h , d h and g 33 with very little sacrifice in the value of d 33 .
Inventors
- 👤 Kenneth A. Klicker
- 👤 Robert E. Newnham
- 👤 Leslie E. Cross
- 👤 James V. Biggers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:58
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/30; H10N30/302; H10N30/80; H10N30/85; H10N30/852; H10N30/853; H10N30/8548; H10N30/8554; Y; Y10; Y10S; Y10S310/00; Y10S310/80
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
68 words
A PZT-polymer composite material of 3-1 connectivity which comprises: a matrix of a polymer; a plurality of PZT rods embedded in said matrix of the polymer each member of said plurality of PZT rods having the longitudinal axis thereof aligned in the same direction; and means for electrically poling said PZT material with poling field parallel to the direction of the axes of said plurality of PZT rods.
Claim 2
Dependent Claim
68 words
A PZT-polymer composite material of 3-1 connectivity which comprises: a matrix of a polymer; a plurality of PZT rods embedded in said matrix of the polymer each member of said plurality of PZT rods having the longitudinal axis thereof aligned in the same direction; and means for electrically poling said PZT material with poling field parallel to the direction of the axes of said plurality of PZT rods.
Claim 3
Dependent Claim
20 words
The PZT-polymer composite material of claim 1 wherein said plurality PZT rods are dispersed throughout said matrix of the polymer.
Claim 4
Dependent Claim
26 words
The PZT-polymer composite material of claim 2 wherein said plurality of PZT rods are of variable diameter for obtaining desired characteristics of said PZT-polymer composite material.
Claim 5
Dependent Claim
30 words
The PZT-polymer composite material of claim 3 which includes silver electrodes on opposite surfaces thereof, said opposite surfaces being generally perpendicular to the axes of said plurality of PZT rods.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |