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US4477581A
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High permittivity ceramic compositions
Assignee: Murata Manufacturing Co Ltd
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Filing: 1983-08-03
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Granted: 1984-10-16
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Expires: 2003-08-03
Abstract
Abstract A high permittivity ceramic composition consisting essentially of a main component expressed by the general formula: (Ba.sub.1-x Me.sub.x) (Ti.sub.1-y Me'.sub.y)O.sub.3 wherein Me is Ca and/or Sr, Me' is Zr and/or Sn, x and y are respective mole fractions of Me and Me', 0.06≦x ≦0.14, and 0.06≦y ≦0.14; and a secondary component consisting essentially of 65 to 90 mol % of PbTiO 3 , 1 to 10 mol % of Pb 5 Ge 3 O 11 and 1 to 30 mol % of Bi 2 Ti 2 O 7 , the content of the secondary component being 5 to 15 weight percent of the amount of the main component.
Inventors
- 👤 Goro Nishioka
- 👤 Hiroshi Komatsu
- 👤 Yukio Sakabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C04B35/4684; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; H01G4/1236; H01G4/1245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A high permittivity ceramic composition consisting essentially of a main component expressed by the general formula: (Ba.sub.1-x Me.sub.x)(Ti.sub.1-y Me'.sub.y)O.sub.3 wherein Me is Ca and/or Sr, Me' is Zr and/or Sn, x and y are respective mole fractions of Me and Me', 0.06≦x≦0.14, and 0.06≦y≦0.14; and a secondary component consisting essentially of 65 to 90 mol % of PbTiO 3 , 1 to 10 mol % of Pb 5 Ge 3 O 11 and 1 to 30 mol % of Bi 2 Ti 2 O 7 , the content of said secondary component being 5 to 15 weight percent of the amount of the main component.
Claim 2
Dependent Claim
105 words
A high permittivity ceramic composition consisting essentially of a main component expressed by the general formula: (Ba.sub.1-x Me.sub.x)(Ti.sub.1-y Me'.sub.y)O.sub.3 wherein Me is Ca and/or Sr, Me' is Zr and/or Sn, x and y are respective mole fractions of Me and Me', 0.06≦x≦0.14, and 0.06≦y≦0.14; and a secondary component consisting essentially of 65 to 90 mol % of PbTiO 3 , 1 to 10 mol % of Pb 5 Ge 3 O 11 and 1 to 30 mol % of Bi 2 Ti 2 O 7 , the content of said secondary component being 5 to 15 weight percent of the amount of the main component.
References Cited (Backward Citations)
US4386985A
Cited
US4379854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |