Claims
- 1. A glass substrate having an adherent ceramic enamel coating, said substrate being prepared in accordance with the method which comprises:
- applying to a glass substrate a ceramic enamel composition comprising:
- 40-80% by weight of at least one lead-free metal oxide glass frit containing precursors of Zn.sub.2 SiO.sub.4, wherein the sum of the weight percentage amounts of said precursors of Zn.sub.2 SiO.sub.4 in said lead-free metal oxide frit is less than about 35% by weight of said lead-free metal oxide frit;
- 0.05-15% by weight of a zinc silicate seed material; and
- 19-37% by weight of a pigment, wherein the sum of the weight percentage amounts of said at least one lead-free metal oxide frit, zinc silicate seed material, and pigment does not exceed 100%, and
- heating the coated glass substrate to an elevated temperature to fuse components of the ceramic enamel composition to the glass substrate.
- 2. A glass substrate as defined in claim 1, wherein the coating is provided on at least a portion of the periphery of the glass substrate.
- 3. A glass substrate as defined in claim 1, wherein in the ceramic enamel composition the precursors of Zn.sub.2 SiO.sub.4 are provided in a single lead-free metal oxide frit.
- 4. A glass substrate as defined in claim 1, wherein in the ceramic enamel composition the precursors of Zn.sub.2 SiO.sub.4 are ZnO and SiO.sub.2.
- 5. A glass substrate as defined in claim 1, wherein in the ceramic enamel composition the zinc silicate seed material comprises crystalline Zn.sub.2 SiO.sub.4.
- 6. A glass substrate as defined in claim 1, wherein in the ceramic enamel composition the zinc silicate seed material consists essentially of crystalline Zn.sub.2 SiO.sub.4.
- 7. A glass substrate according to claim 1, wherein the ceramic enamel composition further comprises a bismuth silicate seed material.
- 8. A glass substrate according to claim 7, wherein the bismuth silicate seed material comprises crystalline bismuth silicate.
- 9. A glass substrate according to claim 8, wherein the crystalline bismuth silicate contains at least one crystalline phase selected from the group consisting of Bi.sub.12 SiO.sub.20, Bi.sub.4 (SiO.sub.4).sub.3, and Bi.sub.2 SiO.sub.5.
- 10. A glass substrate according to claim 1, wherein the ceramic enamel composition further comprises a silver bleed-through resistant material containing iron, silicon, or zinc.
- 11. A glass substrate according to claim 1, wherein the ceramic enamel composition further comprises a crystalline material selected from the group consisting of bismuth silicate compounds, alumina silicate compounds, calcium silicate compounds, boro-alumina-silicate compounds, soda-calcia-alumina-silicate compounds, feldspar compounds, titania, zinc borate, and mixtures thereof.
- 12. A glass substrate according to claim 11, wherein the ceramic enamel composition further comprises an organic vehicle.
- 13. A glass substrate according to claim 1, wherein in the ceramic enamel composition the sum of the weight percentage amounts of said precursors of Zn.sub.2 SiO.sub.4 in said lead-free metal oxide frit is up to 34.5% by weight of said lead-free metal oxide frit.
- 14. A glass substrate according to claim 4, wherein said precursor ZnO is present in an amount of 5-15% by weight and said precursor SiO.sub.2 is present in an amount of 20-30% by weight.
- 15. A glass substrate according to claim 14, wherein the amount of ZnO is in the range of 10 to 15% by weight and the amount of SiO.sub.2 is in the range of 20 to 25% by weight.
Parent Case Info
This application is a division of application Ser. No. 09/078,659, filed May 14, 1998, (now U.S. Pat. No. 5,925,160) which application is, in turn, a divisional of Ser. No. 08/784,924, filed Jan. 16, 1997 (now U.S. Pat. No. 5,783,507.
US Referenced Citations (19)
Foreign Referenced Citations (2)
Number |
Date |
Country |
6-234547 |
Aug 1994 |
JPX |
7-144933 |
Jul 1995 |
JPX |
Divisions (2)
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Number |
Date |
Country |
Parent |
078659 |
May 1998 |
|
Parent |
784924 |
Jan 1997 |
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