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US4394456A
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Temperature-compensating ceramic dielectrics
Assignee: Murata Manufacturing Co Ltd
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Filing: 1982-04-07
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Granted: 1983-07-19
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Expires: 2002-04-07
Abstract
Abstract A temperature-compensating ceramic dielectric mainly comprises a composition consisting essentially of 35 to 65 wt % of neodymium titanates (Nd 2 Ti 2 O 7 ), 10 to 35 wt % of barium titanates (BaTiO 3 ), 10 to 35 wt % of titanium oxide (TiO 2 ), 1 to 6 wt % of bismuth oxide (Bi 2 O 3 ) and 1 to 10 wt % of lead oxide (Pb 3 O 4 ), and contains 1 to 6 wt % of zinc oxide (ZnO) and 1 to 6 wt % of silicon oxide (SiO 2 ). Up to 50 atom % of neodymium in neodymium titanates (Nd 2 Ti 2 O 7 ) may be replaced with at least one element of the other rare earth elements except for Nd.
Inventors
- 👤 Yukio Sakabe
- 👤 Goro Nishioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:16
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/258; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A temperature-compensating ceramic dielectric consisting essentially of a composition consisting essentially of 35 to 65 wt% of neodymium titanate (Nd 2 Ti 2 O 7 ), 10 to 35 wt% of barium titanate (BaTiO 3 ), 10 to 35 wt% of titanium oxide (TiO 2 ), 1 to 6 wt% of bismuth oxide (Bi 2 O 3 ) and 1 to 10 wt% of lead oxide (Pb 3 O 4 ), and including 1 to 6 wt% of zinc oxide (ZnO) and 1 to 6 wt% of silicon oxide (SiO 2 ).
Claim 2
Dependent Claim
92 words
A temperature-compensating ceramic dielectric consisting essentially of a composition consisting essentially of 35 to 65 wt% of neodymium titanate (Nd 2 Ti 2 O 7 ), 10 to 35 wt% of barium titanate (BaTiO 3 ), 10 to 35 wt% of titanium oxide (TiO 2 ), 1 to 6 wt% of bismuth oxide (Bi 2 O 3 ) and 1 to 10 wt% of lead oxide (Pb 3 O 4 ), and including 1 to 6 wt% of zinc oxide (ZnO) and 1 to 6 wt% of silicon oxide (SiO 2 ).
Claim 3
Dependent Claim
41 words
The temperature-compensating ceramic dielectric according to claim 1 wherein up to 50 atom% of neodymium in neodymium titanate (Nd 2 Ti 2 O 7 ) is replaced with at least one element of the other rare earth elements except for Nd.
References Cited (Backward Citations)
DE2848693A1
Cited
US4226735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |