Patent US3541513A successfully refreshed from Google Patents.
US4624796A
Expired / Lapsed
US
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Piezoelectric filler and flexible piezoelectric composites
Assignee: CNA Holdings LLC
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Filing: 1985-12-04
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Granted: 1986-11-25
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Expires: 2005-12-04
Abstract
Abstract A piezoelectric ceramic powder comprises a solid solution of PbTiO3 and BiFeO3 wherein a portion of the iron content is replaced with manganese. A piezoelectric ceramic-polymer composite of 0-3 connectivity is disclosed using as the piezoelectric filler the manganese-doped solid solution.
Inventors
- 👤 Jayne R. Giniewicz
- 👤 Ahmad Safari
- 👤 Robert E. Newnham
- 👤 Leslie E. Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/852; H10N30/853
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
24 words
A piezoelectric ceramic comprising a PbTiO 3 -BiFeO 3 solid solution having 0.5 to 10 mol. % of the iron content replaced with manganese.
Claim 2
Dependent Claim
24 words
A piezoelectric ceramic comprising a PbTiO 3 -BiFeO 3 solid solution having 0.5 to 10 mol. % of the iron content replaced with manganese.
Claim 3
Dependent Claim
20 words
The piezoelectric ceramic of claim 1 having the following formula: [PbTiO.sub.3 ].sub.1-x [Bi(Fe.sub.1-y Mn.sub.y)O.sub.3 ].sub.x ; wherein x=0.5-0.8 and y=0.005-0.10.
Claim 4
Dependent Claim
18 words
The piezoelectric ceramic of claim 2 in powdered form having an average particle size of about 5 microns.
Claim 5
Dependent Claim
49 words
A piezoelectric-polymer composite material of 0-3 connectivity which comprises: a matrix of insulating polymer and a piezoelectric ceramic powder disbursed within said polymer matrix, said ceramic powder comprising a PbTiO 3 -BiFeO 3 solid solution wherein 0.5 to 10 mol. % of the iron content is replaced with manganese.
Claim 6
Dependent Claim
49 words
A piezoelectric-polymer composite material of 0-3 connectivity which comprises: a matrix of insulating polymer and a piezoelectric ceramic powder disbursed within said polymer matrix, said ceramic powder comprising a PbTiO 3 -BiFeO 3 solid solution wherein 0.5 to 10 mol. % of the iron content is replaced with manganese.
Claim 7
Dependent Claim
23 words
The composite of claim 4 wherein said solid solution has the following formula: [PbTiO.sub.3 ].sub.1-x [Bi(Fe.sub.1-y Mn.sub.y)O.sub.3 ].sub.x ; wherein x=0.5-0.8 and y=0.005-0.10.
Claim 8
Dependent Claim
18 words
The composite of claim 4 wherein said ceramic powder comprises 50-75 volume % of said piezoelectric polymer composite.
Claim 9
Dependent Claim
18 words
The composite of claim 6 wherein said ceramic powder comprises 60-75 volume % of said piezoelectric polymer composite.
Claim 10
Dependent Claim
18 words
The composite of claim 4 wherein said ceramic powder has an avaerage particle size of about 5 microns.
Claim 11
Dependent Claim
27 words
The composite of claim 4 wherein said ceramic powder has been formed by quenching a solid solution of heated PbTiO 3 and BiFeO 3 containing said manganese.
Claim 12
Dependent Claim
14 words
The composite of claim 4 wherein said insulating polymer matrix is a thermoplastic resin.
Claim 13
Dependent Claim
14 words
The composite of claim 4 wherein said insulating polymer matrix is a thermosetting resin.
Claim 14
Dependent Claim
14 words
The composite of claim 4 wherein said insulating polymer matrix is an epoxy resin.
References Cited (Backward Citations)
US4128489A
Cited
DE2922260A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |