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High-temperature-resistant selective solar energy-absorbing film and preparation method thereof

A solar energy absorption and selective technology, used in solar thermal power generation, solar thermal devices, heating devices, etc., can solve problems such as functional degradation, achieve great economic value and social value, good atmospheric corrosion resistance, good anti-oxidation protection effect of action

Inactive Publication Date: 2012-10-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All kinds of solar absorbing films currently used face serious functional degradation problems when they exceed 400 °C.

Method used

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  • High-temperature-resistant selective solar energy-absorbing film and preparation method thereof
  • High-temperature-resistant selective solar energy-absorbing film and preparation method thereof
  • High-temperature-resistant selective solar energy-absorbing film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 95g of enamel powder, 5g of NiCrAlY powder, and 50g of alcohol, add it to the agate ball mill tank, ball mill for 100h, spray it on the surface of the stainless steel plate by air spraying, and then heat it for 10 minutes in a muffle furnace heated to 950℃. The profile microstructure appearance is like figure 2 As shown, the macro photo is image 3 Shown. Measure its weight gain by oxidation at 600℃ to be 0.0001mg / cm 2 .h, the solar energy absorption rate reaches 98%, and the infrared radiation rate is 1%.

Embodiment 2

[0028] Weigh 90g of enamel powder, 10g of 304 stainless steel powder, and 50g of alcohol, add it to the agate ball milling tank, ball mill for 100h, spray it on the surface of the stainless steel plate by electrostatic spraying, and then heat it in a muffle furnace heated to 800°C for 30 minutes, and measure it Oxidation weight gain at 600℃ is 0.0001mg / cm 2 .h, the solar energy absorption rate reaches 95%, and the infrared radiation rate is 4%.

Embodiment 3

[0030] Weigh 85g of enamel powder, 15g of chromium powder, and 80g of alcohol, add it to the agate ball mill tank, ball mill for 200h, spray it on the outer surface of the stainless steel pipe by airless spraying method, and then heat it in a muffle furnace heated to 850℃ for 20 minutes, and measure Its 600℃ oxidation weight gain is 0.0001mg / cm 2 .h, the solar energy absorption rate reaches 96%, and the infrared radiation rate is 4%.

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Abstract

The invention provides a high-temperature-resistant selective solar energy-absorbing film, which is characterized by consisting of a transparent enameled matrix and superfine metal particles in a certain ratio, wherein the superfine metal particles are concretely one or combination of the following: nickel-base alloy, iron-base alloy, nickel, iron, chromium, aluminum, zinc, tungsten and molybdenum. The selective solar energy-absorbing film obtained by the invention is a metal / enameled composite film with a cellular structure, and has heat-resistant temperature up to over 600 DEG C, solar energy absorptivity up to 95 percent and over, infrared radiation rate less than 5 percent, as well as good resistance to atmospheric corrosion. The manufacturing method can be suitable for batch automatic production, and the absorbing film can be smeared on the inner or outer walls of pipes, the surfaces of flat plates or regular curved-surface bodies and other regular surfaces and irregular surfaces. The invention has foreseeable great economic and social value.

Description

Technical field [0001] The present invention relates to the technical field of high temperature resistant solar heat absorption film, and particularly provides a high temperature resistant selective solar energy absorption film and a preparation method thereof. Background technique [0002] Focused solar thermal power generation technology is currently the lowest cost solar power generation technology. Its key material technologies include heat absorption film, reflector and heat storage medium. Advanced heat-absorbing film should have high solar spectrum absorptivity, low infrared emissivity and good high temperature resistance. The currently used endothermic films include intrinsic endothermic films, tandem semiconductor / metal films, multilayer films, metal / dielectric composite films, rough surface films (black body + selective transparent film) and other types. The material used in the intrinsic heat absorption film has the characteristic of selective absorption of the solar ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N6/00F24J2/48
CPCY02E10/40F24S70/225
Inventor 朱圣龙王福会辛丽王文王成
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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