Coated glass or glass ceramic substrate, coating comprising closed pores, and method for coating a substrate
AssigneeSchott AG
InventorsYvonne Menke-Berg, Stephanie Mangold, Matthias Bockmeyer, Vera Steigenberger, Adam O'Ryan, Matthew Moose, Michael Schwall
Life of this patent
Estimating the term…
Abstract
Coated glass or glass ceramic substrates having high temperature resistance, high strength, and a low coefficient of thermal expansion. The coating includes pores, is fluid-tight and suitable for coating a temperature-resistant, high-strength glass or glass ceramic substrate with a low coefficient of thermal expansion, and to a method for producing such a coated substrate.
Claims22
A method for coating a glass or glass ceramic substrate, comprising the steps of:
- preparing a suspension comprising a glass powder and an agent that decomposes upon temperature increase to form a volatile substance;
- applying the suspension to the glass or glass ceramic substrate so that at least part of the substrate is covered by the suspension;
- fixing the suspension applied on the substrate at a first temperature between 0° C. and 300° C. to form a substrate with a fixed suspension;
- annealing the substrate with the fixed suspension at a second temperature between 450° C. and 900° C. so that the glass particles melt and the agent decomposes to form the volatile substance and to cause formation of a coated substrate with an enamel coating that has closed pores;
- and
- cooling the coated substrate to room temperature.
A method for coating a glass or glass ceramic substrate, comprising the steps of:
- preparing a suspension comprising a glass powder and an agent that decomposes upon temperature increase to form a volatile substance;
- applying the suspension to the glass or glass ceramic substrate so that at least part of the substrate is covered by the suspension;
- fixing the suspension applied on the substrate at a first temperature between 0° C. and 300° C. to form a substrate with a fixed suspension;
- annealing the substrate with the fixed suspension at a second temperature between 450° C. and 900° C. so that the agent decomposes to form the volatile substance and to cause formation of a coated substrate with a coating that has closed pores;
- cooling the coated substrate to room temperature;
- and
- applying, after the suspension applying step and before the annealing step, a non-adhering cover sheet to the suspension.
Dependencies are inferred from the claim text.