Claims
- 1. An improved dielectric ink for thick film printing consisting of:
- a powdered, high dielectric constant material 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;
- an alkali-free glass binder comprising from 3 percent to 7 percent by total weight of the dielectric and binder materials, the binder having at least the electropositive element barium present therein, the alkali-free glass 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______________________________________
- and
- a liquid vehicle for said dielectric and binder materials.
- 2. An improved dielectric ink as set forth in claim 1 wherein
- said powdered, high dielectric constant material comprises barium titanate.
- 3. An improved dielectric ink as set forth in claim 1 wherein said dielectric material is modified barium titanate, comprising from 82% to 86% by weight barium titanate, balance barium stannate.
- 4. An improved dielectric ink as set forth in claim 1 wherein
- the alkali-free glass binder has the following formation:
- ______________________________________Ingredient % by weight______________________________________BaO 42ZnO 9SiO.sub.2 40B.sub.2 O.sub. 3 6Al.sub.2 O.sub.3 3.______________________________________
- 5. An improved dielectric ink as set forth in claim 1 wherein
- the dielectric material composition is a modified barium titanate and the metal oxide additive is one selected from the class of materials consisting of lanthanum oxide, cerium compounds, stannates, zirconates, neodymium oxide and bismuth compounds.
- 6. An improved dielectric ink as set forth in claim 1 wherein
- the alkali-free glass binder includes titanium dioxide as an additive material.
- 7. An improved dielectric ink as set forth in claim 6 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.______________________________________
- 8. The improved dielectric ink as set forth in claim 7 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.______________________________________
- 9. An improved dielectric ink as set forth in claim 8 wherein
- the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
- 10. An improved dielectric ink 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.
- 11. An improved dielectric ink as set forth in claim 10 wherein said glass binder comprises 3% by weight of said ink.
CROSS-REFERENCE TO RELATED PATENT APPLICATION
This patent application is a division of our copending patent application, Ser. No. 532,454, filed Dec. 13, 1974 and now U.S. Pat. No. 3,968,412, and which is a Continuation-In-Part of our copending patent application, Ser. No. 383,280, filed on July 27, 1973, now U.S. Pat. No. 3,878,443 and both of which are assigned to the same assignee as this patent application.
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
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Parent |
532454 |
Dec 1974 |
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Continuation in Parts (1)
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Number |
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383280 |
Jul 1973 |
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