US4355256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic composition for a piezoelectric body and electromechanical transducer
Assignee: US Philips Corp
•
Filing: 1980-05-14
•
Granted: 1982-10-19
•
Expires: 2000-05-14
Abstract
Abstract Piezoelectric body for an electromechanical transducer consisting of Pb 1-a M a (Mg.sub.(1-b)/3 Mn b/3 Sb 2/3 ) x Ti y Zr z O 3 , wherein M is one or more of the alkaline earth metals Ca, Sr and Ba, 0≦a≦0.15, 0≦b≦0.20, 0.01≦x≦0.25, 0.40≦y≦0.55, 0.20≦z≦0.59, (x+y+z)=1. This material has the advantage that polarization is effected in a very short period of time at room temperature.
Inventors
- 👤 David J. Perduijn
- 👤 Jacobus Verberkt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/093; H10N30/097; H10N30/04; H10N30/045; H10N30/80; H10N30/85; H10N30/853; H10N30/8548
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A piezoelectric body for an electromechanical transducer corresponding to the ternary system lead titanate-lead zirconate-Pb(M 1/3 II M 2/3 V )O 3 , characterized in that said piezoelectric body consists of Pb 1-a M a (Mg.sub.(1-b)/3 Mn b/3 Sb 2/3 ) x Ti y Zr z O 3 wherein M is one or more of the alkaline earth metals Ca, Sr and Ba and wherein, 0≦a≦0.15, 0≦b≦0.20, 0.01≦x≦0.25, 0.40≦y≦0.55, 0.20≦z≦0.59 and (x+y+z)=1.
Claim 2
Dependent Claim
72 words
A piezoelectric body for an electromechanical transducer corresponding to the ternary system lead titanate-lead zirconate-Pb(M 1/3 II M 2/3 V )O 3 , characterized in that said piezoelectric body consists of Pb 1-a M a (Mg.sub.(1-b)/3 Mn b/3 Sb 2/3 ) x Ti y Zr z O 3 wherein M is one or more of the alkaline earth metals Ca, Sr and Ba and wherein, 0≦a≦0.15, 0≦b≦0.20, 0.01≦x≦0.25, 0.40≦y≦0.55, 0.20≦z≦0.59 and (x+y+z)=1.
Claim 3
Dependent Claim
22 words
A body as claimed in claim 1, characterized in that 0.125≦x≦0.15, 0.44≦y≦0.46 and 0.38≦z≦0.44, while the molar fraction of Sr is 0.05.
References Cited (Backward Citations)
US2906710A
Cited
US3671765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |