Infrared reflexive aggregate and preparation method thereof

Abstract

The invention discloses an infrared reflexive aggregate. In the infrared reflexive aggregate, pretreated mica is taken as a substrate, and a clading layer with the thickness of between 0.5 and 5 micrometers is coated on the outer surface of the substrate; the thickness of the mica is between 0.5 and 5 micrometers, and the grain diameter is between 0.5 and 120 micrometers; and the cladding layer is doped zinc oxide, and the doped zinc oxide consists of ZnO serving as a main metal oxide and doping metal in a molar ratio of 0.1 to 10 percent. The invention also provides a preparation method of the infrared reflexive aggregate simultaneously, which comprises the following steps of: 1) pretreating the mica; and 2) coating the cladding layer outside the outer surface of the pretreated mica serving as the substrate. In the aggregate, the excellent infrared reflexive performance of the doped zinc oxide serving as a film is reserved, the aggregate is used for preparing a transparent or semitransparent infrared reflexive coating film, and thus, the problem of the infrared reflection of deep color coatings is solved to a certain extent.

Description

technical field [0001] The invention relates to an infrared reflective aggregate and a preparation method thereof; in particular, it relates to an infrared reflective aggregate with mica flakes as a substrate and zinc oxide doped as a coating layer and a preparation method thereof. Background technique [0002] Solar energy is a necessary condition for human survival and life, but strong radiation also brings inconvenience to human life. The energy of sunlight radiated to the surface of the earth is about 750W / m per second 2 . Under the irradiation of sunlight, heat continuously accumulates on the surface of the irradiated object, which will make its surface temperature continuously increase. The increase in the surface temperature of the roof and exterior walls of buildings will cause the surrounding environment and indoor temperature to be too high, reduce the comfort of the living environment, and increase the power consumption of air conditioning and cooling. [0003]...

AI Technical Summary

Problems solved by technology

In areas with cold winter and hot summer, if the way of barrier insulation is adopted, the possible problem is that in the hot summer, the internal heat of office buildings in this area is too large, and the use of barrier insulation may cause internal heat to be unable to dissipate. Insulation is carried out, and internal heating will also cause an increase in cooling load

[0015] CN1077729 has described a kind of conductive pigment that has highly reflective ability to infrared ray, and its main characteristic is to take tin oxide and / or titanium oxide doped with halogen as cladding layer, take flake material as base; But its shortcoming is also obvious : the first, the reserve of Sn in nature is few, utilizes it to prepare the cost of conductive layer very high,; The 2nd, the method for its described preparation pigment is difficult for control (need to keep the stability of suspension pH with NaOH in the preparation process ), and the material preparation cycle is long (the preparation process takes as long as 10 to 14 hours)