US4468471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for ceramic dielectrics
Assignee: Mitsubishi Mining and Cement Co Ltd
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Filing: 1983-03-03
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Granted: 1984-08-28
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Expires: 2003-03-03
Abstract
Abstract A temperature compensating composition for ceramic dielectrics comprising La 2 O 3 --TiO 2 --CaO--MgO based composite as a main component and ZrO 2 as an additive respectively sintered. As the composition is very fine in grain size, it is a very suitable raw material for such a product as a layer-built capacitor which is used in a high electric field.
Inventors
- 👤 Masao Kashima
- 👤 Yasuo Miyashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1236; H01G4/1245; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/48; C04B35/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
In a composition for temperature-compensating ceramic dielectrics useful in a layer-built capacitor, comprising La 2 O 3 -TiO 2 -CaO-MgO based composite consisting of 3.0-25.0 mol % La 2 O 3 , 51.0-62.0 mol % TiO 2 , 0.5-45.0 mol % CaO and 1.0-45.0 mol % MgO as a main component, the improvement wherein grain size is not more than five microns, and ZrO 2 is present as an additive, the amount of said ZrO 2 being 0.1 -8.0 weight % of said main component.
Claim 2
Dependent Claim
85 words
In a composition for temperature-compensating ceramic dielectrics useful in a layer-built capacitor, comprising La 2 O 3 -TiO 2 -CaO-MgO based composite consisting of 3.0-25.0 mol % La 2 O 3 , 51.0-62.0 mol % TiO 2 , 0.5-45.0 mol % CaO and 1.0-45.0 mol % MgO as a main component, the improvement wherein grain size is not more than five microns, and ZrO 2 is present as an additive, the amount of said ZrO 2 being 0.1 -8.0 weight % of said main component.
References Cited (Backward Citations)
US3431124A
Cited
JPS5058600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |