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US 6,686,305 B1Granted
Methods of making low thermal expansion calcium aluminate articles
AssigneeCorning Incorporated
InventorsDouglas M. Beall, Shahid G. Lakhwani, Linda R. Pinckney
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Abstract
Methods of making ceramic bodies are disclosed. The methods include manufacturing calcium aluminate material having a low coefficient of thermal expansion.
Claims18
A method of manufacturing a ceramic article comprising:
- mixing powdered material including the phases calcium monoaluminate and calcium dialuminate;
- forming the powders into a green ceramic body;
- and
- firing the ceramic body to a temperature such that the thermal expansion of the fired body is less than 30×10−7/° C. over the temperature range 25° C. to 800° C.
1 more element
A method of manufacturing a fired calcium aluminate body comprising:
- mixing powdered materials including phases of calcium monoaluminate, calcium dialuminate and alumina in a ratio sufficient to avoid hydration of the fired body;
- forming a green body from the powdered materials;
- and
- firing the body to a temperature such that the coefficient of thermal expansion is less than about 30×10−7/° C. over the temperature range 25° C. to 800° C.
1 more element
Dependencies are inferred from the claim text.