Thermal protective coating for ceramic surfaces

Details Thermal protective coating for ceramic surfaces Thermal protective coating for ceramic surfaces

C - Chemistry, Metallurgy

09

D

C09D 1/00 (2006.01) C09D 5/18 (2006.01)

Patent

CA 2537697

A coating admixture, method of coating and substrates coated thereby, wherein the coating contains colloidal silica, colloidal alumina, or combinations thereof; a filler such as silicon dioxide, aluminum oxide, titanium dioxide, magnesium oxide, calcium oxide and boron oxide; and one or more emissivity agents such as silicon hexaboride, carbon tetraboride, silicon tetraboride, silicon carbide, molybdenum disilicide, tungsten disilicide, zirconium diboride, cupric chromite, or metallic oxides such as iron oxides, magnesium oxides, manganese oxides, chromium oxides, copper chromium oxides, cerium oxides, terbium oxides, and derivatives thereof. In a coating solution, an admixture of the coating contains water. A stabilizer such as bentonite, kaolin, magnesium alumina silicon clay, tabular alumina and stabilized zirconium oxide is also added.

Mélange de revêtement, procédé de revêtement et substrats. Ce revêtement contient silice colloïdale, alumine colloïdale ou leurs combinaisons, une charge, telle que dioxyde de silicium, oxyde d'aluminium, dioxyde de titane, oxyde de magnésium, oxyde de calcium et oxyde de bore, ainsi qu'un ou plusieurs agents émissifs, tels que hexaborure de silicium, tétraborure de carbone, tétraborure de silicium, carbure de silicium, disiliciure de molybdène, disiliciure de tungstène, diborure de zirconium, chromite cuprique ou des oxydes métalliques, tels que des oxydes de fer, des oxydes de magnésium, des oxydes de manganèse, des oxydes de chrome, des oxydes de cuprochrome, des oxydes de sérium, des oxydes de terbium et leurs dérivés. Dans une solution de revêtement, un mélange du revêtement contient de l'eau. Ce dernier contient également un apport de stabilisant, tel que bentonite, kaolin, argile de silicium-magnésium-alumine, alumine tabulaire et oxyde de zirconium stabilisé.

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