US4551268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-dependent resistor and method of making the same
Assignee: Panasonic Holdings Corp
•
Filing: 1983-02-10
•
Granted: 1985-11-05
•
Expires: 2003-02-10
Abstract
Abstract The present invention provides a voltage-dependent resistor of the bulk-type in which zinc oxide (ZnO) powder and additives are admixed to form a sintered body composition having as the main constituent, zinc oxide, and in which the mixture is formed into a resistor body, the body is sintered, and electrodes are applied to the opposite surfaces of the sintered body, the improvement comprising the step of, prior to sintering and admixture with said zinc oxide, admixing all amount of boron oxide (B 2 O 3 ) with other additives in the form of a borosilicate glass, which is composed of 5 to 30 weight percent of boron oxide (B 2 O 3 ) and 70 to 95 weight percent of silicon oxide (SiO 2 ). A process for the production of said resistor is also provided.
Inventors
- 👤 Kazuo Eda
- 👤 Yasuharu Kikuchi
- 👤 Osamu Makino
- 👤 Michio Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:19
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A voltage-dependent resistor of bulk-type comprising a sintered body consisting essentially of, as a main constituent, zinc oxide (ZnO) and, as additives, 0.1 to 3.0 mole percent of bismuth oxide (Bi 2 O 3 ), 0.1 to 3.0 mole percent of cobalt oxide (Co 2 O 3 ), 0.1 to 3.0 mole percent of manganese oxide (MnO 2 ), 0.1 to 3.0 mole percent of antimony oxide (Sb 2 O 3 ), 0.05 to 1.5 mole percent of chromium oxide (Cr 2 O 3 ), 0.005 to 0.3 mole percent of boron oxide (B 2 O 3 ), at least one member selected from the group of 0.0005 to 0.025 mole percent of aluminum oxide (Al 2 O 3 ) and 0.0005 to 0.025 mole percent of gallium oxide (Ga 2 O 3 ), and at least one member selected from the group of 0.1 to 3.0 mole percent of nickel oxide (NiO) and 0.1 to 10.0 mole percent of silicon oxide (SiO 2 ) with electrodes applied to opposite surfaces of said sintered body.
Claim 2
Dependent Claim
175 words
A voltage-dependent resistor of bulk-type comprising a sintered body consisting essentially of, as a main constituent, zinc oxide (ZnO) and, as additives, 0.1 to 3.0 mole percent of bismuth oxide (Bi 2 O 3 ), 0.1 to 3.0 mole percent of cobalt oxide (Co 2 O 3 ), 0.1 to 3.0 mole percent of manganese oxide (MnO 2 ), 0.1 to 3.0 mole percent of antimony oxide (Sb 2 O 3 ), 0.05 to 1.5 mole percent of chromium oxide (Cr 2 O 3 ), 0.005 to 0.3 mole percent of boron oxide (B 2 O 3 ), at least one member selected from the group of 0.0005 to 0.025 mole percent of aluminum oxide (Al 2 O 3 ) and 0.0005 to 0.025 mole percent of gallium oxide (Ga 2 O 3 ), and at least one member selected from the group of 0.1 to 3.0 mole percent of nickel oxide (NiO) and 0.1 to 10.0 mole percent of silicon oxide (SiO 2 ) with electrodes applied to opposite surfaces of said sintered body.
Claim 3
Dependent Claim
187 words
A voltage-dependent resistor of bulk-type comprising a sintered body consisting essentially of, as a main constituent, zinc oxide (ZnO) and, as additives, 0.1 to 3.0 mole percent of bismuth oxide (Bi 2 O 3 ), 0.1 to 3.0 mole percent of cobalt oxide (Co 2 O 3 ), 0.1 to 3.0 mole percent of manganese oxide (MnO 2 ), 0.1 to 3.0 mole percent of antimony oxide (Sb 2 O 3 ), 0.05 to 1.5 mole percent of chromium oxide (Cr 2 O 3 ), 0.0005 to 0.3 mole percent of boron oxide (B 2 O 3 ), at least one member selected from the group of 0.0005 to 0.025 mole percent of aluminum oxide (Al 2 O 3 ) and 0.0005 to 0.025 mole percent of gallium oxide (Ga 2 O 3 ), and at least one member selected from the group of 0.1 to 3.0 mole percent of nickel oxide (NiO) and 0.1 to 10.0 mole percent of silicon oxide (SiO 2 ) and 0.0005 to 0.3 mole percent of silver oxide (Ag 2 O), with electrodes applied to opposite surfaces of said sintered body.
Claim 4
Dependent Claim
187 words
A voltage-dependent resistor of bulk-type comprising a sintered body consisting essentially of, as a main constituent, zinc oxide (ZnO) and, as additives, 0.1 to 3.0 mole percent of bismuth oxide (Bi 2 O 3 ), 0.1 to 3.0 mole percent of cobalt oxide (Co 2 O 3 ), 0.1 to 3.0 mole percent of manganese oxide (MnO 2 ), 0.1 to 3.0 mole percent of antimony oxide (Sb 2 O 3 ), 0.05 to 1.5 mole percent of chromium oxide (Cr 2 O 3 ), 0.0005 to 0.3 mole percent of boron oxide (B 2 O 3 ), at least one member selected from the group of 0.0005 to 0.025 mole percent of aluminum oxide (Al 2 O 3 ) and 0.0005 to 0.025 mole percent of gallium oxide (Ga 2 O 3 ), and at least one member selected from the group of 0.1 to 3.0 mole percent of nickel oxide (NiO) and 0.1 to 10.0 mole percent of silicon oxide (SiO 2 ) and 0.0005 to 0.3 mole percent of silver oxide (Ag 2 O), with electrodes applied to opposite surfaces of said sintered body.
References Cited (Backward Citations)
US3950274A
Cited
US4045374A
Cited
US4147670A
Cited
US4169071A
Cited
US4180483A
Cited
US4111851A
Cited
US4452729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |