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Composite-structure pigment having low lightness and infrared emitting ability and preparation method thereof

A low-infrared emission, composite structure technology, applied in the field of functional materials, can solve the problems of high infrared reflectivity, material brightness reduction, etc., and achieve the effect of low cost and easy realization

Inactive Publication Date: 2012-08-08
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above formula, as long as the thickness of the particle coating layer on the surface of the aluminum sheet is reasonably controlled, the infrared light can pass through the particle layer to reach the surface of the aluminum sheet with a small loss, thereby maintaining a high infrared reflectivity; visible light with a shorter wavelength can penetrate Most of the medium is lost by the medium, which reduces the brightness of the material

Method used

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  • Composite-structure pigment having low lightness and infrared emitting ability and preparation method thereof
  • Composite-structure pigment having low lightness and infrared emitting ability and preparation method thereof
  • Composite-structure pigment having low lightness and infrared emitting ability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Weigh clean flake aluminum powder (particle size is 8um) and Cr(NO 3 ) 3 9H 2 O and add emulsifier OP-10 into the Erlenmeyer flask together, inject absolute ethanol, control Cr 3+The ion concentration is 0.07M; ultrasonically disperse the above mixed system, and stir in a constant temperature water bath magnetic stirrer; control the reaction temperature of the mixed system at 60°C, and slowly add ammonia solution diluted with absolute ethanol dropwise to make the pH of the mixed system The value is controlled between 7 and 9; after the reaction is completed, centrifuge the obtained product at 2000r / min for 2 minutes, filter off the supernatant, wash and filter the precipitate, and dry it in a constant temperature drying oven at 50°C After 10 hours, the obtained dry powder was ground with an agate mortar, sieved with a drying net, put into a muffle furnace, and calcined at a temperature of 400-450°C for 2 hours to obtain the final low lightness and low infrared emissiv...

Embodiment 2

[0035] According to Table 2, different molar concentrations of Cr(NO 3 ) 3 9H 2 O ethanol solution, according to Cr(NO 3 ) 3 9H 2 The O:Al molar ratio is 0.1:1. Add clean flake aluminum powder and emulsifier OP-10 into the Erlenmeyer flask; ultrasonically disperse the above mixing system, and stir in a constant temperature water bath magnetic stirrer; control the mixing The reaction temperature of the system is 60°C, and the ammonia solution diluted with absolute ethanol is slowly added dropwise, so that the pH value of the mixed system is controlled between 7 and 9; Centrifuge for 2 minutes, filter off the supernatant, wash and filter the sediment, and dry in a constant temperature drying oven at 50°C for 10 hours. The obtained dry powder is ground with an agate mortar, sieved with a drying net, and then put into a muffle furnace , calcined at a constant temperature of 400-450° C. for 2 hours to obtain the final composite structural pigment with low lightness and low inf...

Embodiment 3

[0039] According to Table 3, clean flaky aluminum powders with different particle sizes were selected, according to Al:Cr(NO 3 ) 3 9H 2 Al:Cr(NO 3 ) 3 9H 2 O ethanol solution, and add emulsifier OP-10 into the Erlenmeyer flask configuration solution, control Cr 3+ The ion concentration is 0.07M; ultrasonically disperse the above mixed system, put it into a constant temperature water bath magnetic stirrer; control the reaction temperature of the mixed system at 60°C, and slowly add ammonia solution diluted with absolute ethanol dropwise to make the pH of the mixed system The value is controlled between 7 and 9; after the reaction is completed, centrifuge the obtained product at 2000r / min for 2 minutes, filter off the supernatant, wash and filter the precipitate, and dry it in a constant temperature drying oven at 50°C After 10 hours, the obtained dry powder was ground with an agate mortar, sieved with a drying net, put into a muffle furnace, and calcined at a constant temp...

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Abstract

The invention discloses a composite-structure pigment having low lightness and infrared emitting ability and a preparation method thereof, and belongs to the technical field of functional materials. The composite-structure pigment is aluminum powder of which particle surfaces are coated with nanoscale chromium oxide particles. The nanoscale chromium oxide particles hide the metal luster of particle surfaces of the aluminum powder so that a high infrared emitting ability of the aluminum powder is reduced suitably and thus the composite-structure pigment having low lightness and infrared emitting ability is obtained. The preparation method realizes deposition of nanoscale chromium oxide particles on particle surfaces of aluminum powder by a chemical precipitation method and a calcination process. The composite-structure pigment obtained by the preparation method has low lightness of 72.1 to 53.6 and infrared emitting ability of (0.71 to 0.43) in an atmospheric sounding window range of 8 to 14 microns, and can be used as a main padding of a multi-band (visible light band and infrared band) infrared camouflage coating.

Description

technical field [0001] The invention belongs to the technical field of functional materials, relates to energy-saving materials, and is especially suitable for energy-saving decorative coatings. The invention includes a composite pigment with low lightness and low infrared emissivity and a preparation method thereof. Background technique [0002] With the rapid development of industrial production, the contradictions brought about by energy issues have become increasingly prominent in modern society. People are also increasingly advocating efficient and intensive use of energy. The use of environmentally friendly and energy-saving materials and technologies can effectively improve energy utilization efficiency. In the near future, the widespread use of energy-saving materials will be an important trend. [0003] Because aluminum has the advantages of low price, ductility, and low density, micron-sized aluminum powder is widely used as a pigment for ordinary coatings. The...

Claims

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Application Information

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IPC IPC(8): C09C1/64C09C3/06
Inventor 翁小龙卢虎袁乐
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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