Silicon carbide electric heating element surface anti-oxidization coating and preparing method thereof

• Main Authors: NIU FANGXU, WANG YANXIANG, MA LIANRU, QU CE, LIU QUN, WANG CHENGGUO
• Format: Patent
• Language: Chinese; English
• Published: 09.10.2018
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

The invention discloses a silicon carbide electric heating element surface anti-oxidization coating and a preparing method thereof, and belongs to the field of high-temperature anti-oxidization coating preparing. The silicon carbide electric heating element surface anti-oxidization coating comprises an inner coating body and an outer coating body. The preparing method of the silicon carbide electric heating element surface anti-oxidization coating comprises the steps that firstly, the surface of a silicon carbide electric heating element is subjected to cleaning, dirt removal and drying; secondly, MoSi2 and alkaline silica sol are evenly mixed, and the mixture is applied to the surface of a heating part of the silicon carbide electric heating element in the first step through a brush; thirdly, the silicon carbide electric heating element in the second step is placed in an oven to be dried; and fourthly, NaAlSi3O8 powder, SiO2 powder and Si powder are evenly mixed with the alkaline silica sol, the mixture is a