US4383196A
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Piezoelectric ceramic body for an electromechanical transducer
Assignee: US Philips Corp
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Filing: 1982-06-17
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Granted: 1983-05-10
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Expires: 2002-06-17
Abstract
Abstract Electromechanical transducer comprising a piezoelectric body 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, 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. 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
2026-10-29 22:17
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/04; H10N30/045; H10N30/09; H10N30/093; H10N30/097; H10N30/80; H10N30/85; H10N30/853; H10N30/8548
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
An electromechanical transducer comprising a piezoelectric body corresponding to the ternary system lead titanate-lead zirconate--Pb(M II 1/3 M V 2/3 )O 3 , and electrodes attached to said body, 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
79 words
An electromechanical transducer comprising a piezoelectric body corresponding to the ternary system lead titanate-lead zirconate--Pb(M II 1/3 M V 2/3 )O 3 , and electrodes attached to said body, 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
25 words
The electromechanical transducer of claim 1, characterized in that in the piezoelectric body 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |