Method for coating hollow microbeads with titanium-lanthanum oxides

Abstract

The present invention discloses a method for coating hollow microbeads with titanium-lanthanum oxides. By the method, the surfaces of the hollow microbeads are evenly coated with rutile nano titanium oxide and have a good reflection effect, and the heat-insulation effect of the coating is improved. The method comprises: heating a mixed solution of titanium sulfate solution and lanthanum sulfate solution while stirring to 75-90 DEG C, maintaining the constant temperature and controlling the stirring speed at 500-800 rpm, and simultaneously adding soaked hollow microbeads to the mixed solution at a constant speed within 60-90 minutes; adjusting the pH value of the system to 8.0-9.5, then stirring the system at the stirring speed of 30-80 rpm for 40-90 minutes, and simultaneously ultrasonically vibrating the system; then filtering and washing until the material has a solid content of more than 40%; then carrying out microwave treatment for 15-25 minutes until the material has a solid content of more than 90% and fluffy oxidized surfaces; and heating the material in a roaster to 300 DEG C, maintaining for 1-3 hours, then heating to 900 DEG C and maintaining for 30-60 minutes so that titanium hydroxide coated on the surface of the hollow microbeads is transformed into rutile titanium dioxide.

Description

Technical field [0001] The invention relates to a method for coating hollow microbeads with titanium oxide-lanthanum. Background technique [0002] In thermal insulation reflective coatings, in order to enhance the thermal insulation and reflection function of the coating, titanium dioxide is often added to the coating, and the other components in the coating are combined with the titanium dioxide and then coated on the surface of the object, through the reflection of light by the titanium dioxide , Strengthen the reflection of sunlight and enhance the heat insulation effect. The key to the effect of titanium dioxide on sunlight reflection is: 1. Its crystal structure must be rutile; 2. The smaller the particles, the higher the efficiency, and it is best to achieve nanometer level. However, the current titanium dioxide added to the thermal insulation coating does not meet these conditions. At the same time, the hollow microspheres in the thermal insulation coating are very ligh...

AI Technical Summary

Problems solved by technology

However, the titanium dioxide currently added to thermal insulation coatings does not meet these conditions.

At the same time, the hollow microspheres in the thermal insulation coating are very light, and the specific gravity of titanium dioxide is very different from that of the hollow microspheres. It is easy to delaminate during the use of the coating, which affects the thermal insulation effect of the coating.

Moreover, the existing coating process is relatively complicated, and it is not easy to realize industrialization, which increases the cost of the coating