Preparation of a mineral radiant powder and its application in building thermal insulation coatings

Abstract

The invention discloses a preparation of a mineral radiation powder and its application in building heat-insulating coatings. The mineral radiation powder is made of SiO 2 , Al 2 o 3 , MgO, Fe 2 o 3 , ZnO, Cr 2 o 3 ,Co 2 o 3 , Ni 2 o 3 and B 2 o 3 After mixing in proportion, it is calcined in three stages at 900°C, 1000°C, and 1250°C. The prepared product is dominated by defect spinel phase, and the emissivity of this defect structure reaches 0.94 in the 2.5-25μm band. The filler of the present invention adopts a three-stage stepped calcination method, and the sintered product has a spinel structure with defects. Impurity ions cause lattice distortion, which reduces the symmetry of lattice vibration and increases the non-simplification of polarization vibration. Harmony, which causes phonon combination radiation, and lattice distortion enhances the infrared radiation rate, so that the prepared coating has good radiation and heat insulation performance.

Description

technical field [0001] The invention belongs to the field of materials, in particular to building insulating water-based coatings. Background technique [0002] The progress and development of science and technology have increased the demand for energy in human society, but in contradiction to the relative decrease in energy supply, the energy problem has become a serious obstacle to the sustainable development of human society in the 21st century. At present, with the rapid development of my country's construction industry, building energy consumption has also increased accordingly. The Ministry of Construction has proposed that "by 2010, the total energy consumption of urban buildings in the country should basically achieve 50% energy saving, and by 2020, the northern and coastal economically developed regions and megacities should achieve the goal of 65% building energy saving. This energy shortage and urgent need to reduce consumption The urgent status quo will bring hu...

AI Technical Summary

Problems solved by technology

[0005] The preparation method of fillers in existing radiant heat-insulating coatings is generally made by directly mixing various raw materials with radiative functions or through one-time calcination. The fillers prepared by this method have a low emissivity, generally 0.7-0.8. The single product produced by calcination makes the radiation band range small, which limits the heat insulation effect of the coating, and the prepared coating coating cannot achieve the real heat insulation effect

Therefore, there is no really mature building heat-insulating coating in China, so the research on radiation-type heat-insulating coating is still in its infancy in my country.

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