Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nano composite Cr-Al-O (chromium-aluminum-oxygen) solar spectrum selective absorption coating and preparation method thereof

A solar spectrum and selective absorption technology, which is applied in the field of nanocomposite Cr-Al-O solar spectrum selective absorption coating and its preparation, can solve the problem of low cost, less research on the optical properties and microstructure of the coating, and high ion energy. and other problems, to achieve the effect of overcoming poor adhesion, good industrial application prospects and simple equipment structure

Inactive Publication Date: 2013-08-21
WUHAN UNIV
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Arc ion plating technology is also a physical vapor deposition technology. Due to its characteristics of no pollution, high ionization rate, fast deposition rate, large ion energy, and low cost, it is currently the main preparation technology for hard coatings, and its application There are still very few studies on the preparation of solar spectrum selective absorption coatings, and even less research on the optical properties and microstructure of the prepared coatings.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nano composite Cr-Al-O (chromium-aluminum-oxygen) solar spectrum selective absorption coating and preparation method thereof
  • Nano composite Cr-Al-O (chromium-aluminum-oxygen) solar spectrum selective absorption coating and preparation method thereof
  • Nano composite Cr-Al-O (chromium-aluminum-oxygen) solar spectrum selective absorption coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The preparation process of this present embodiment is:

[0045] First, the cleaning of the base material. The base material was ultrasonically cleaned in acetone, alcohol, and deionized water for 15 minutes each, then dried in a desiccator, and then loaded on a workpiece rack whose rotation speed could be adjusted between 3-5 rpm, and the door of the sample preparation chamber was closed.

[0046] Second, the acquisition of a vacuum environment. The first is to use a mechanical pump to pump air under low vacuum conditions; when the vacuum degree reaches below 2pa, turn on the molecular pump to convert the pumping system into a high vacuum system until 8×10 -3 below pa.

[0047] Third, the preparation of the coating. First set the rotating speed of the workpiece holder to 3-5rpm. Then use high-power (1.4-1.6 kilowatts) arc discharge technology to evaporate Cr ions from the Cr target with current, and deposit them on the rotating substrate connected to the negative bi...

Embodiment 1

[0050] Embodiment one: at 10 -3 Under the vacuum degree, the control speed is 3rpm, and the high-energy ions evaporated from the Cr target are used to deposit the Cr layer on the cleaned stainless steel substrate. The power of the deposition source is 1.4 kilowatts, the bias voltage on the workpiece is -800V, and the deposition time is 10min. The thickness of the infrared high reflection layer is 500 nanometers; after the deposition is completed, reduce the bias voltage to -100V, feed in oxygen with a flow rate of 15SCCM, and adjust the argon flow rate to make the vacuum degree 0.4Pa, open the CrAl target, and the current is 30A, The corresponding power is 0.6 kilowatts, and the hypoxic absorbing layer is deposited, and the hypoxic absorbing layer is Cr-Al alloy nanocrystal and amorphous phase (Al 2 Cr)-O X The composite material, the deposition time is 2min, where X is 0.67, the thickness is 65 nanometers, and the size of the metal nanocrystal is 4-5 nanometers; the oxygen f...

Embodiment 2

[0051] Embodiment two: at 10 -2 Under the vacuum degree, the control speed is 5rpm, and the high-energy ions evaporated from the Cr target are used to deposit the Cr layer on the cleaned stainless steel substrate. The power of the deposition source is 1.6 kilowatts, the bias voltage on the workpiece is -1000V, and the deposition time is 10min. The thickness of the infrared high reflection layer is 600 nanometers; after the deposition is completed, reduce the bias voltage to -200V, feed in oxygen with a flow rate of 20SCCM, and adjust the argon flow rate to make the vacuum degree 0.5Pa, open the CrAl target, and the current is 40A, The corresponding power is 0.8 kilowatts, and the hypoxic absorbing layer is deposited. The hypoxic absorbing layer is Cr-Al alloy nanocrystal and amorphous phase (Al 2 Cr)-O X The composite material, the deposition time is 2min, where X is 0.7, the thickness is 70 nanometers, and the size of metal nanocrystals is 3-5 nanometers; the oxygen flow rat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a nano composite Cr-Al-O (chromium-aluminum-oxygen) solar spectrum selective absorption coating and a preparation method thereof. The absorption coating is characterized in that an infrared high reflection layer, a low oxygen absorption layer, a medium oxygen absorption layer and a high oxygen antireflection layer are sequentially deposited on a stainless steel substrate. According to the preparation method of the coating, an electric arc discharging method is adopted to sequentially deposit the infrared high reflection layer, the low oxygen absorption layer, the medium oxygen absorption layer and the high oxygen antireflection layer on the substrate. The coating is reasonable in structure design. The prepared Cr-Al-O composite coating has an absorption ratio of 0.92 to 0.94, a transmitting rate of 0.15 to 0.22, good heat stability and high adhesive force. Meanwhile, the preparation process is free from pollution, the severe environmental pollution problem of the conventional electroplating method is overcome, the problems of the magnetron sputtering method, such as poor heat stability and the high-temperature adhesive force of coating and the problem of the evaporation technology that uniformity of the coating is poor can be solved, and the nano composite Cr-Al-O solar spectrum selective absorption coating is expected to be applied to the medium-high-temperature solar utilization field.

Description

technical field [0001] The invention relates to the field of thin film materials, in particular to a nanocomposite Cr-Al-O solar spectrum selective absorption coating and a preparation method thereof. Background technique [0002] In the solar photothermal conversion device, the solar radiation must first be converted into heat energy, and the component that can realize this function is the solar collector. Part of the core of the part is the solar spectrum selective absorbing coating. This coating absorbs most of the light waves in the ultraviolet to near-infrared range of the solar spectrum, and is transparent in the infrared band. Depositing the coating on a metal substrate can use its high infrared reflection characteristics to reflect infrared waves away. The purpose of this design is to avoid as much as possible the high heat emissivity caused by the coating absorbing infrared light waves, resulting in heat energy loss, especially as the working temperature of the coa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C14/32C23C14/08C23C14/54F24J2/48B32B15/04
CPCY02E10/40F24S70/225
Inventor 刘辉东杨兵万强王如意
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com