Solar intermediate-temperate high-temperature selective absorbing coating with absorbing layers composed of boron-containing compounds and preparation method of solar intermediate-temperate high-temperature selective absorbing coating

A technology of absorbing coatings and boron compounds, applied in solar thermal power generation, chemical instruments and methods, coatings, etc., can solve problems such as unsuitable for large-scale industrial production, high energy consumption, high equipment requirements, and environmental pollution. Achieve the effects of fast film formation, low preparation cost and low emissivity

Active Publication Date: 2013-11-20
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for creation of new materials that are resistant against corrosives or other environmental factors over longer periods without requiring expensive metal components. It also provides improved performance at higher temperatures compared with current methods due to its ability to absorb more light than traditional films made from pure noble gases (N2). Additionally, this technique does not require any special equipment nor involve preheating the substrates beforehand, making it suitable for mass manufacturing processes.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency and durability of heat collection systems used in various industries including solar thermochemistry or photovoltaics. Current methods involve depositing layers containing specific types of material onto surfaces that absorb light effectively without causing damage from environmental factors such as water condensations or other gases during operation. However, current methods require precise control over certain parameters involved due to their complex nature and poor reproducibility.

Method used

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  • Solar intermediate-temperate high-temperature selective absorbing coating with absorbing layers composed of boron-containing compounds and preparation method of solar intermediate-temperate high-temperature selective absorbing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Coating structure reference figure 1 , the structure adopted from bottom to top is: substrate / copper / titanium monoboride / titanium nitride boride / titanium oxide, and the substrate is any one of aluminum, copper, stainless steel, alloy or glass. The infrared high reflective layer is copper, and copper powder is evaporated by electron beam; the first absorption layer is titanium boride (TiB, at this time, x and y are both 0), and titanium boride powder is evaporated by electron beam; the second absorption layer Titanium boride (TiBN 0.3 , at this time x'=0, y'=0.3), use electron beam to evaporate titanium boride powder, pass nitrogen gas into the evaporation process, and react to form titanium nitride boride; the anti-reflection layer is titanium oxide, which is oxidized by electron beam evaporation Titanium powder.

[0038] The thickness of the prepared film layer is as follows: the thickness of copper in the infrared high reflection layer is 50nm, the thickness of tita...

Embodiment 2

[0041] The substrate is any one of aluminum, copper, stainless steel, alloy or glass, and the coating structure is: substrate / molybdenum / molybdenum oxyboride / molybdenum oxyboride / zirconia, refer to figure 1. The infrared high reflective layer is molybdenum, which is prepared by multi-arc ion plating under argon with a molybdenum target; the first absorbing layer is molybdenum oxyboride (Mo 2 BO 0.4 , at this time x=0.4, y=0), prepared by multi-arc ion plating with molybdenum boride target and oxygen reaction; the second absorbing layer is molybdenum oxyboride (Mo 2 BO 0.8 , at this time x’=0.8, y’=0), prepared by multi-arc ion plating with molybdenum boride target and oxygen reaction; the oxygen flow rate of the second absorbing layer is greater than that of the first absorbing layer. The anti-reflection layer is zirconia, which is prepared by multi-arc ion plating with zirconium target and oxygen reaction.

[0042] The thickness of the prepared film layer is as follows: t...

Embodiment 3

[0045] Coating structure reference figure 1 , the structure adopted from bottom to top is: substrate / copper / titanium monoboride / titanium nitride boride / titanium oxide, and the substrate is any one of aluminum, copper, stainless steel, alloy or glass. The infrared high reflective layer is copper, which is DC sputtered with a copper target; the first absorption layer is titanium boride (TiB, at this time x and y are both 0), and a titanium boride target is used for DC sputtering under argon; The second absorber layer is titanium boride (TiBN 0.6 , at this time x’=0, y’=0.6), using a titanium boride target and nitrogen reactive sputtering; the anti-reflection layer is titanium oxide, titanium target and oxygen DC reactive sputtering.

[0046] The thickness of the prepared film layer is as follows: the thickness of copper in the infrared high reflection layer is 50nm, the thickness of titanium monoboride in the first absorption layer is 50nm, the thickness of titanium boride nitr...

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Abstract

The invention discloses a solar intermediate-temperate high-temperature selective absorbing coating. The coating sequentially comprises an infrared high-reflection layer, a first absorbing layer, a second absorbing layer and an antireflection layer on the surface of a substrate from bottom to top, the first absorbing layer and the second absorbing layer are composed of gradient compositions of boron-containing compounds prepared by physical vapor deposition, and the boron-containing compounds are metal boride, metal nitrogen boride, metal oxygen boride or metal nitrogen oxygen boride. The coating is high in absorption rate and low in emissivity, has good intermediate-temperate and high-temperature inoxidizability and can be used at the high temperature in a non-vacuum condition for a long time. During preparation, radio frequency sputtering is avoided, the substrate is not heated, large-scale industrial production can be realized extremely easily, and the solar intermediate-temperate high-temperature selective absorbing coating has the advantages of energy conservation, easiness in control, low preparation cost, quick film formation and the like.

Description

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Claims

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Application Information

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Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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