Patent US4048546A successfully refreshed from Google Patents.
US4048546A
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Dielectric powder compositions
Assignee: EIDP Inc
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Filing: 1975-07-09
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Granted: 1977-09-13
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Expires: 1995-07-09
Abstract
Abstract Finely divided dielectric powder compositions having the formula (SrxPb1-xTiO3)a(PbMg0.5W0.5O3)b wherein X IS 0-0.
Inventors
- 👤 Robert Joseph Bouchard
- 👤 Lothar Heinrich Brixner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/47; H; H01; H01B; H01B3/00; H01B3/02; H01B3/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
81 words
A finely divided dielectric powder calcined in air at a temperature in the range 750°-900° C. for at least 5 minutes, the powder having the composition (Sr.sub.x Pb.sub.1-x TiO.sub.3).sub.a (PbMg.sub.0.5 W.sub.0.5 O.sub.3).sub.b wherein x is 0-0.10, a is 0.35-0.5, b is 0.5-0.65, and a plus b equals one, substantially all the powder particles being 20 microns or less in largest dimension, said powder being sinterable in air at temperatures in the range 900°-1050° C. to produce bodies having high dielectric constant.
Claim 2
Dependent Claim
81 words
A finely divided dielectric powder calcined in air at a temperature in the range 750°-900° C. for at least 5 minutes, the powder having the composition (Sr.sub.x Pb.sub.1-x TiO.sub.3).sub.a (PbMg.sub.0.5 W.sub.0.5 O.sub.3).sub.b wherein x is 0-0.10, a is 0.35-0.5, b is 0.5-0.65, and a plus b equals one, substantially all the powder particles being 20 microns or less in largest dimension, said powder being sinterable in air at temperatures in the range 900°-1050° C. to produce bodies having high dielectric constant.
Claim 3
Dependent Claim
20 words
A powder according to claim 1 wherein a is in the range 0.35-0.45 and b is in the range 0.55-0.65.
Claim 4
Dependent Claim
10 words
A powder according to claim 1 wherein x is 0.
Claim 5
Dependent Claim
10 words
A powder according to claim 2 wherein x is 0.
Claim 6
Dependent Claim
13 words
A powder according to claim 1 wherein x is in the range 0.01-0.08.
Claim 7
Dependent Claim
13 words
A powder according to claim 2 wherein x is in the range 0.01-0.08.
Claim 8
Dependent Claim
18 words
A powder according to claim 1 which has been calcined in air for 15 minutes to 8 hours.
Claim 9
Dependent Claim
17 words
A powder according to claim 1 having a surface area in the range 0.2-5 m. 2 /g.
Claim 10
Dependent Claim
32 words
A disk capacitor, sintered in air at a temperature in the range 900°-1150° C., comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 1.
Claim 11
Dependent Claim
32 words
A disk capacitor, sintered in air at a temperature in the range 900°-1150° C., comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 2.
Claim 12
Dependent Claim
21 words
A disk capacitor comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 3.
Claim 13
Dependent Claim
21 words
A disk capacitor comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 4.
Claim 14
Dependent Claim
21 words
A disk capacitor comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 5.
Claim 15
Dependent Claim
21 words
A disk capacitor comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 6.
Claim 16
Dependent Claim
21 words
A disk capacitor comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 7.
Claim 17
Dependent Claim
21 words
A disk capacitor comprising electrodes on a sintered dielectric disk, wherein the dielectric disk is of the composition of claim 8.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |