Non-stick, pyrolytic coatings for heating devices

1. A heating device, comprising:

an enamel base coat disposed on at least one surface of the heating device; and

a top coat disposed on the enamel base coat, the top coat comprising a pyrocatalytic, non-stick coating, the pyrocatalytic non-stick coating comprising:

(i) a binder comprising a condensation product of a silica sol and at least one silane, the at least one silane including methyltrimethoxysilane; and

(ii) a pyrolysis catalyst dispersed within the binder, wherein the catalyst comprises a perovskite crystalline material, a pyrochlore crystalline material, a spinel crystalline material, an ilmenite crystalline material, or combinations thereof; wherein

the pyrocatalytic, non-stick coating is a final coating on the at least one surface and the pyrocatalytic, non-stick coating is free of fluorine.

2. The heating device of claim 1 , wherein the perovskite crystalline material has a formula:

ABX 3   (I)

wherein A and B comprise a cation, and X comprises an anion;

wherein A comprises an alkali metal, an alkali earth metal, a lanthanide, bismuth, or combinations thereof, and wherein B comprises an alkali metal, an alkaline earth metal, a 4d transition metal, a 5d transition metal, antimony, tin, or combinations thereof.

3. The heating device of claim 1 , wherein the pyrochlore crystalline material has a formula:

A 2 B 2 X 7   (II)

wherein A and B comprise a cation, and X comprises an anion,

wherein A comprises an alkali metal, an alkali earth metal, a lanthanide, bismuth, or combinations thereof, and wherein B comprises an alkali metal, an alkaline earth metal, a 3d transition metal, a 4d transition metal, or combinations thereof.

4. The heating device of claim 1 , wherein the spinel crystalline material has a formula:

AB 2 X 4   (III)

wherein A and B comprise a cation, and X comprises an anion, wherein A and B comprise an alkali metal, an alkali earth metal, a 3d transition metal, bismuth, or combinations thereof.

5. The heating device of claim 1 , wherein the catalyst is present in the pyrocatalytic non-stick coating in an amount in a range from about 1 weight percent to about 50 weight percent of the pyrocatalytic non-stick coating.

6. The heating device of claim 1 , wherein the pyrocatalytic non-stick coating further comprises a filler.

7. The heating device of claim 6 , wherein the filler comprises an oxide, a carbide, a boride, a nitride, an oxycarbide, an oxynitride, or combinations thereof.

8. The heating device of claim 1 , wherein the at least one surface comprises a metallic material, a ceramic material, a glass material, or combinations thereof.

9. The heating device of claim 1 , the binder further comprising tetraethoxysilane.

10. A method, comprising:

(i) providing a pyrolysis catalyst comprising a perovskite crystalline material, a pyrochlore crystalline material, a spinel crystalline material, an ilmenite crystalline material, or combinations thereof;

(ii) providing a binder material comprising a condensation product of a silica sol and at least one silane, the at least one silane including methyltrimethoxysilane;

(iii) contacting the pyrolysis catalyst with the binder material to form a coating composition;

(iv) disposing an enamel base coat on a surface of a substrate;

(v) disposing the coating composition on the enamel base coat such that the coating composition is a final coating on the surface of the substrate; and

(vi) heat-treating the coating composition to form a pyrocatalytic non-stick coating on the surface of the substrate; wherein the coating composition is free of fluorine.

11. The method of claim 10 , wherein the step (v) comprises heat-treating the coating composition at a temperature in a range from about 280° C. to about 850° C.

12. The method of claim 10 , wherein the substrate is a component of a heating device.