US4503482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic dielectric basis on bismuth-containing BaTiO3
Assignee: US Philips Corp
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Filing: 1983-09-28
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Granted: 1985-03-05
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Expires: 2003-09-28
Abstract
Abstract Ceramic dielectric based on bismuth-containing BaTiO 3 in the form of a monophase mixed crystal-ceramic in which 0.02 to 0.12 mol of the layer perovskite PbBi 4 Ti 4 O 15 or SrBi 4 Ti 4 O 15 per mol of BaTiO 3 are provided. On account of its comparatively low sintering temperature and in particular on account of the very small change of the value of the relative dielectric constant with applied direct voltage fields, the ceramic is particularly suitable for the manufacture of multilayer capacitors.
Inventors
- 👤 Detlev Hennings
- 👤 Herbert Schreinemacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C04B35/4684
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
40 words
A ceramic dielectric consisting essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite PbBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 2
Dependent Claim
40 words
A ceramic dielectric consisting essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite PbBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 3
Dependent Claim
33 words
A ceramic dielectric as claimed in claim 1, characterized in that the mixed crystal consists essentially of 0.03 to 0.06 mol PbBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 4
Dependent Claim
33 words
A ceramic dielectric as claimed in claim 2, characterized in that the mixed crystal consists essentially of 0.03 to 0.04 mol PbBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 5
Dependent Claim
40 words
A ceramic dielectric consisting essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite SrBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 6
Dependent Claim
40 words
A ceramic dielectric consisting essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite SrBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 7
Dependent Claim
33 words
A ceramic dielectric as claimed in claim 4, characterized in that the mixed crystal consists essentially of 0.03 to 0.06 mol SrBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 8
Dependent Claim
33 words
A ceramic dielectric as claimed in claim 5, characterized in that the mixed crystal consists essentially of 0.03 to 0.04 mol SrBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 9
Dependent Claim
31 words
A ceramic dielectric as claimed in claim 6, characterized in that the mixed crystal consists essentially of 0.03 mol SrBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 10
Dependent Claim
76 words
A ceramic multilayer capacitor comprising: a plurality of layers of ceramic dielectric material; and a plurality of layers of metallic electrodes, one metallic electrode layer arranged between two layers of ceramic dielectric; characterized in that the ceramic dielectric layers consist essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite PbBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 11
Dependent Claim
76 words
A ceramic multilayer capacitor comprising: a plurality of layers of ceramic dielectric material; and a plurality of layers of metallic electrodes, one metallic electrode layer arranged between two layers of ceramic dielectric; characterized in that the ceramic dielectric layers consist essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite PbBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 12
Dependent Claim
34 words
A ceramic multilayer capacitor as claimed in claim 8, characterized in that the mixed crystal consists essentially of 0.03 to 0.06 mol PbBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 13
Dependent Claim
34 words
A ceramic multilayer capacitor as claimed in claim 9, characterized in that the mixed crystal consists essentially of 0.03 to 0.04 mol PbBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 14
Dependent Claim
76 words
A ceramic multilayer capacitor comprising: a plurality of layers of ceramic dielectric material; and a plurality of layers of metallic electrodes, one metallic electrode layer arranged between two layers of ceramic dielectric; characterized in that the ceramic dielectric layers consist essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite SrBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 15
Dependent Claim
76 words
A ceramic multilayer capacitor comprising: a plurality of layers of ceramic dielectric material; and a plurality of layers of metallic electrodes, one metallic electrode layer arranged between two layers of ceramic dielectric; characterized in that the ceramic dielectric layers consist essentially of a monophase ceramic in the form of a mixed crystal of BaTiO 3 and 0.02 to 0.12 mol of the perovskite SrBi 4 Ti 4 O 15 for each mol of BaTiO 3 .
Claim 16
Dependent Claim
34 words
A ceramic multilayer capacitor as claimed in claim 11, characterized in that the mixed crystal consists essentially of 0.03 to 0.06 mol SrBi 4 Ti 4 0 15 per mol of BaTiO 3 .
Claim 17
Dependent Claim
34 words
A ceramic multilayer capacitor as claimed in claim 12, characterized in that the mixed crystal consists essentially of 0.03 to 0.04 mol SrBi 4 Ti 4 O 15 per mol of BaTiO 3 .
Claim 18
Dependent Claim
32 words
A ceramic multilayer capacitor as claimed in claim 13, characterized in that the mixed crystal consists essentially of 0.03 mol SrBi 4 Ti 4 O 15 per mol of BaTiO 3 .
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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |