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In a new study, silicone resins were used as adhesives, flaky aluminum powders as pigments, and low melting point glass powders as functional fillers to create low infrared emission coatings with good thermal stability.
the effect of low melting point glass powder on coating adhesion, thermal expansion and infrared emission rate. In addition, the surface microstructure and thermal stability of the coating are analyzed in detail
. Mechanical tests have shown that the addition of low melting point glass powder to the Al/polysilane coating enhances its adhesion due to the mechanical interlocking of particles by secondary film-forming low melting point glass.
the antioxidant properties of the coating
thermal analysis shows that the antioxidant properties of the coating can be improved by film-forming low melting point glass powder. Has about 15wt. The low radiation rate coating with % low melting point glass powder content and 1.5 Al/polysiloxane ratio shows good thermal stability. After heating at 500 degrees C, the adhesion of the coating is increased to 9.0±0.4 MPa.
the content of glass at the low melting point increased from 0 to 15wt. At %, with a pigment/adhesive ratio of 1.5, the oxide heating peak of the coating changes from 590 degrees C to 625 degrees C. After heating at 600 degrees C, the infrared emission rate of the coating is 0.25.
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