Claims
- 1. A capacitor comprising
- a substrate having two opposed major surfaces;
- a first layer of an electrically conductive metal disposed on one of the major surfaces of the substrate to form a first electrode disposed thereon;
- a layer of dielectric material having a composition which includes a barium titanate material which is one selected from the group consisting of chemically pure barium titanate and chemically pure barium titanate modified with from about 0.125% to about 5.0% by weight of a metal oxide additive and from 3 percent to 7 percent by weight of a alkali-free binder having at least the electropositive element barium present therein, disposed on the first electrically conductive metal layer, the alkali-free glass binder has the following formulation:
- Ingredient % by weight______________________________________BaO 38 to 46ZnO 7 to 11SiO.sub.2 35 to 45B.sub.2 O.sub.3 6 to 8Al.sub.2 O.sub.3 2 to 5______________________________________
- a second layer of an electrically conductive metal disposed on the layer of dielectric material to form a second electrode disposed thereon.
- 2. The capacitor as set forth in claim 1 wherein
- the alkali-free glass binder has the following formulation:
- Ingredient % by weight______________________________________BaO 42ZnO 9SiO.sub.2 40B.sub.2 O.sub.3 6Al.sub.2 O.sub.3 3.______________________________________
- 3. The capacitor as set forth in claim 1 wherein
- the glass binder includes titanium dioxide as an additive material.
- 4. A capacitor as set forth in claim 3 wherein
- the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
- 5. The capacitor as set forth in claim 1 wherein
- the alkali-free glass binder has the following formulation:
- Ingredient % by weight______________________________________BaO 38 - 46ZnO 7 - 11SiO.sub.2 35 - 45B.sub.2 O.sub.3 6 - 8Al.sub.2 O.sub.3 2 - 5TiO.sub.2 3 - 10.______________________________________
- 6. The capacitor as set forth in claim 5 wherein
- the alkali-free glass binder has the following formulation:
- Ingredient % by weight______________________________________BaO 42.05ZnO 9.00SiO.sub.2 35.59B.sub.2 O.sub.3 5.96Al.sub.2 O.sub.3 2.67TiO.sub.2 4.73.______________________________________
- 7. The capacitor as set forth in claim 6 wherein
- the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
- 8. The capacitor as set forth in claim 1 wherein
- the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
- 9. A capacitor as set forth in claim 1 wherein
- the material of the substrate is one selected from the group consisting of alumina, beryllia, mullite and fosterite.
- 10. A capacitor as set forth in claim 9 wherein
- the material of the substrate comprises alumina.
- 11. A capacitor as set forth in claim 7 wherein
- the material of the substrate is one selected from the group consisting of alumina, beryllia, mullite and fosterite.
- 12. A capacitor as set forth in claim 11 wherein
- the material of the substrate comprises alumina.
- 13. A capacitor as set forth in claim 8 wherein
- the material of the substrate is one selected from the group consisting of alumina, beryllia, mullite and fosterite.
- 14. A capacitor as set forth in claim 1 wherein
- the material of the first and second electrodes comprises a material which is one selected from the group consisting of platinum, a platinum-palladium alloy, a platinum-gold alloy and a palladium-silver alloy.
- 15. The capacitor of claim 1 wherein the dielectric material composition is a modified barium titanate and the metal oxide additive is on selected from the class of materials consisting of lanthanum oxide, cerium compounds, stannates, zirconates, neodymium oxide and bismuth compounds.
CROSS-REFERENCE TO RELATED PATENT APPLICATION
This patent application is a Continuation-In-Part of our copending patent application, Ser. NO. 383,280, filed on July 27, 1973 and assigned to the same assignee as this patent application and now U.S. Pat. No. 3,878,443.
US Referenced Citations (5)
Continuation in Parts (1)
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Number |
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383280 |
Jul 1973 |
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