The invention relates to the
processing field of
thermal insulation coatings, in particular to a preparation method of an ATO
thermal insulation coating. The preparation method includes the steps that deionized water is added into nanometer ATO
powder, the mixture is stirred evenly, and
slurry is prepared; the evenly stirred
slurry is perpendicularly jetted to the surface of a roller rotating at high speed through a jetting
nozzle from top to bottom; the roller tosses the
slurry to an atomizing chamber on one side to form slurry liquid drops; high-pressure
inert gas is injected into the atomizing chamber from bottom to top to
impact the slurry liquid drops; the
inert gas is recycled from the upper side of the atomizing chamber, and the ATO slurry is collected from the lower side of the atomizing chamber; waterborne
polyurethane emulsion is added into the collected ATO slurry, the mixture is stirred evenly and then stands, and the ATO
thermal insulation coating is obtained. The jetted ATO slurry is crashed under the
centrifugal force of the rotating roller and impacted by the high-speed
inert gas, clustering of ATO particles in the slurry is broken, in this way, the dispersion effect of the ATO slurry is improved, and then the prepared ATO thermal insulation
coating is stable in performance and good in thermal insulation effect.