US4447855A
Expired / Lapsed
US
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Dielectric ceramic composition on the base of thermally stable barium titanate and capacitor using such composition
Assignee: LCC CICE-COMPAGNIE EUROPEENNE DE COMPOSANTS ELECTRO NIQUES-36
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Filing: 1983-02-28
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Granted: 1984-05-08
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Expires: 2003-02-28
Abstract
Abstract The invention relates to dielectric ceramic compositions on the base of barium titanate, allowing class BX capacitors to be used. According to the invention, the compositions are characterized in that they comprise from 80 to 94% by weight barium titanate, from 1 to 3% neodymium oxide, from 0 to 4% by weight bismuth oxide, from 2 to 5% by weight bismuth titanate and from 2 to 8% by weight glass frit.
Inventors
- 👤 Alain Lagrange
- 👤 Alain Rossello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:48
CPC Classifications
C; C03; C03C; C03C14/00; C03C14/004; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A ceramic capacitor comprising at least one dielectric layer and at least two electrodes, each pair of said electrodes being separated by said dielectric layer, wherein said dielectric layer comprised from 80 to 94% by weight of barium titanate, from 1 to 3% by weight of neodymium oxide, from 0 to 4% bismuth oxide, from 2 to 5% by weight of bismuth titanate (Bi 2 O 3 2TiO 2 ) and from 2 to 8% by weight of glass frit, the whole having been selected so as to form 100% by weight.
Claim 2
Dependent Claim
92 words
A ceramic capacitor comprising at least one dielectric layer and at least two electrodes, each pair of said electrodes being separated by said dielectric layer, wherein said dielectric layer comprised from 80 to 94% by weight of barium titanate, from 1 to 3% by weight of neodymium oxide, from 0 to 4% bismuth oxide, from 2 to 5% by weight of bismuth titanate (Bi 2 O 3 2TiO 2 ) and from 2 to 8% by weight of glass frit, the whole having been selected so as to form 100% by weight.
Claim 3
Dependent Claim
16 words
A ceramic capacitor according to claim 1, comprising more than 1.4% by weight of neodymium oxide.
Claim 4
Dependent Claim
16 words
A ceramic capacitor according to claim 1, comprising 1.4% to 2% by weight of neodymium oxide.
Claim 5
Dependent Claim
17 words
A ceramic capacitor according to claim 1, comprising from 1 to 4% by weight of bismuth oxide.
Claim 6
Dependent Claim
23 words
A ceramic capacitor according to claim 1, wherein the barium titanate comprises a TiO 2 /BaO molar ratio comprised between 1.06 and 1.09.
Claim 7
Dependent Claim
20 words
A ceramic capacitor according to claim 1, wherein the glass frit comprises more than 70% by weight of bismuth oxide.
Claim 8
Dependent Claim
30 words
A ceramic capacitor according to claim 6, wherein it comprises substantially 81% by weight of bismuth oxide, 17% by weight of lead oxide, and 2% by weight of boron oxide.
Claim 9
Dependent Claim
15 words
A ceramic capacitor according to claim 1, further comprising less than to 2% of additives.
Claim 10
Dependent Claim
16 words
A ceramic capacitor according to claim 8, wherein it comprises about 0.5% by weight of additives.
Claim 11
Dependent Claim
23 words
A ceramic capacitor according to claim 8, wherein the additives are selected among the group comprising zinc oxides, manganese oxides and their mixture.
Claim 12
Dependent Claim
17 words
A ceramic capacitor according to claim 10, wherein it comprises about 0.25% by weight of manganese oxide.
Claim 13
Dependent Claim
55 words
Electric capacitor according to claim 1, comprising a plurality of metallic electrodes separated by dielectric layers, the even number metallic electrodes rows and the odd number metallic electrodes rows being, respectively, connected to each other, wherein the said electrodes are constituted by a mixture of palladium and silver comprising at least 70% by weight silver.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
US4308571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |