High emissivity coating compositions and manufacturing processes therefore

A method of preparing a thermal emissivity coating composition for a substrate, the method comprising:

• obtaining titanium dioxide;
• providing a set of emissivity agents including the titanium dioxide;
• providing a set of matrix strength enhancers that includes at least one matrix strength enhancer selected from the group consisting of ceramic borides, ceramic carbides, and ceramic nitrides;
• providing a set of fillers, at least one filler selected from the group consisting of aluminum oxide, silicon dioxide, magnesium oxide, calcium oxide, and boron oxide;
• and
• combining the set of emissivity agents, the set of matrix strength enhancers, and the set of fillers, wherein the at least one filler comprises about 2 wt % to about 60 wt % on a wet basis of the coating composition.

A method for modifying thermal emissivity of a substrate using a thermal emissivity coating composition, the method comprising:

• identifying a target emissivity level or a target emissivity modification;
• determining a coating composition titanium dioxide concentration expected to provide the target emissivity level or the target emissivity modification;
• determining a set of substrate adhesion properties for the coating composition;
• determining a coating composition SiC concentration expected to provide the determined set of substrate adhesion properties;
• and
• providing a thermal emissivity coating composition that includes the determined titanium dioxide concentration and the determined SiC concentration.