Nanometer ceramic coating with high-temperature resistance and thermal insulation performance and preparation method thereof

Abstract

The invention discloses a nanometer ceramic coating with high-temperature resistance and thermal insulation performance, belonging to the technical field of thermal insulation coatings. The coating comprises the following raw materials by weight: 35-50 parts of vinyl acetate-acrylic emulsion, 15-17 parts of aluminum silicate fibers, 6-10 parts of polytrimethylene terephthalate fibers, 6-8 parts of diatomite, 5-7 parts of quartz powder, 3-5 parts of zinc white powder, 14-16 parts of light calcium carbonate, 10-12 parts of ceramic beads, 1-3 parts of carboxymethyl cellulose, 1-5 parts of a defoaming agent, 2-6 parts of a dispersant, 3-4 parts of a penetrant and 40-45 parts of deionized water. The invention also discloses a preparation method for the nanometer ceramic coating with high-temperature resistance and thermal insulation performance. The nanometer ceramic coating provided by the invention has the advantages of simple preparation, high-temperature resistance, excellent thermal insulation effect, good mechanical strength and long service life.

Description

technical field [0001] The invention relates to the technical field of thermal insulation coatings, in particular to a nano ceramic high temperature thermal insulation coating and a preparation method thereof. Background technique [0002] Traditional thermal insulation materials are mostly porous loose materials, such as rock wool, glass wool, perlite, polyurethane foam, light calcium carbonate, etc. These materials block the movement of heated molecules and play a role in thermal insulation. However, heat transfer, in addition to solid heat transfer, also has radiation heat transfer, and radiation heat transfer is not affected by the medium, and the interface does not play a role. The higher the temperature, the stronger the radiation. Therefore, it is not enough to only consider solid heat transfer in the insulation of high-temperature heat transfer pipelines. [0003] Traditional insulation materials have a high water absorption rate of more than 200%. A large amount o...

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Problems solved by technology

The nano-ceramic high-temperature-resistant thermal insulation coating of the invention takes into account both solid heat transfer and radiation heat transfer, the thermal insulation effect is greatly improved, and the high temperature resistance reaches 1000 °C; however, the mechanical strength of the thermal insulation coating is insufficient, and it is difficult to ensure a long service life.