High emissivity coating
AssigneeEquity Enterprises
InventorsCressie E. Holcombe, Jr., Lloyd R. Chapman
Life of this patent
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Abstract
A high emissivity coating for coating the interior of a furnace to direct thermal energy toward a load in the furnace wherein the furnace operates above 1100.degree. C. The high emissivity coating includes a high emissivity agent and a binder agent. The preferred high emissivity agent is cerium oxide which defines a high emissivity factor from approximately 1000.degree. C. to above 2000.degree. C. The binder suspension agent is formulated to define the consistency and drying characteristics of paint such that the coating can be applied in a manner similar to the manner in which paint is applied. Moreover, the binder/suspension agent withstands the final use temperature.
Claims18
A high emissivity coating composition for coating selected surfaces in a furnace wherein the furnace operates above 1000.degree. C., said high emissivity coating composition comprising:
- a high emissivity agent being based on a rare earth oxide wherein said rare earth is selected from the group consisting of cerium and terbium;
- and,
- a binder agent for mixing with said high emissivity agent such that said high emissivity agent is adhereable to the selected surfaces in the furnace, said binder agent being comprised of about 40-70 weight percent aluminum phosphate solution, about 25-45 weight percent peptized aluminum oxide monohydrate, and about 5-15 weight percent ethyl alcohol.
The high emissivity coating composition of claim wherein said binder agent binds said high emissivity agent to the selected surfaces in the furnace to which said coating composition is applied when the furnace is heated to the operating temperature range.
A high emissivity coating composition for coating selected surfaces in a furnace wherein the furnace operates above 1000.degree. C., said high emissivity coating composition comprising:
- a high emissivity agent being based on a rare earth oxide wherein said rare earth is cerium;
- and,
- a binder agent for mixing with said high emissivity agent such that said high emissivity agent is adhereable to the selected surfaces in the furnace, said binder agent being comprised of about 40-70 weight percent aluminum phosphate solution, about 25-45 weight percent peptized aluminum oxide monohydrate, and about 5-15 weight percent ethyl alcohol.
Dependencies are inferred from the claim text.