US4404029A
Expired / Lapsed
US
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Non-linear polycrystalline barium titanate-type dielectric element
Assignee: TDK Corp
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Filing: 1982-02-19
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Granted: 1983-09-13
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Expires: 2002-02-19
Abstract
Abstract A D-E hysteresis loop of ferroelectrics known in the art has a square shape when the ferroelectrics are a BaTiO 3 single crystal. Such ferroelectrics are used as a non-linear dielectric element of, for example a pulse generating device. The non-linear dielectric element according to the present invention consists of a polycrystal mainly composed of Ba(Ti 0 .90-0.98 Sn 0 .02-1.00)O 3 and having an average grain diameter of from 10 to 60 μm. The non-linearity is excellent and the temperature dependence of the non-linearity is considerably low.
Inventors
- 👤 Shoichi Iwaya
- 👤 Hitoshi Masumura
- 👤 Yoshifumi Midori
- 👤 Yasunobu Oikawa
- 👤 Hisao Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A non-linear dielectric element which utilizes the non-linearity of a dielectric constant that depends on an electric field consisting of a sintered polycrystal mainly composed of Ba(Ti 0 .90-9.98 Sn 0 .02-0.10)O 3 and having an average grain diameter in the range of from 10 to αμm.
Claim 2
Dependent Claim
47 words
A non-linear dielectric element which utilizes the non-linearity of a dielectric constant that depends on an electric field consisting of a sintered polycrystal mainly composed of Ba(Ti 0 .90-9.98 Sn 0 .02-0.10)O 3 and having an average grain diameter in the range of from 10 to αμm.
Claim 3
Dependent Claim
23 words
A non-linear dielectric element according to claim 1, wherein said average grain diameter is in the range of from 16 to 40 μm.
Claim 4
Dependent Claim
45 words
A non-linear dielectric element according to claim 1, wherein said element comprises a minor but effective amount of a mineralizer additive, which is at least one selected from the group consisting of a clay material, manganese oxide and a compound of a rare earth element.
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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |