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Vanadium dioxide doped powder, and film and preparation method thereof

A vanadium dioxide and powder technology, applied in the field of vanadium dioxide powder preparation, can solve the problems of complex process, difficult industrialization, low visible light transmittance, etc., and achieve the effects of wide application, low cost and simple process

Active Publication Date: 2014-09-10
江苏先进无机材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the application of vanadium dioxide in smart windows still has the following main problems: (1) the adjustment performance of vanadium dioxide film is difficult to exceed 10%; (2) the visible light transmittance is not high, and the optimized vanadium dioxide film The integrated visible light transmittance is still difficult to exceed 50%, which cannot meet the requirements of indoor lighting; (3) Insufficient infrared control ability, when the visible light transmittance reaches 50%, the solar light control ability before and after the phase change is less than 10%
(4) The ugly yellow color reflected by vanadium dioxide cannot meet the aesthetic requirements
The above methods cannot simultaneously solve the problems of phase transition temperature, control performance and transmittance
European patent WO2010038202-A1 and US patent US2011260123-A1 reported the preparation and application of magnesium-doped vanadium oxide thin films, but this method is complex and difficult to industrialize, and there is no report on the use of magnesium-doped vanadium oxide powder.

Method used

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  • Vanadium dioxide doped powder, and film and preparation method thereof
  • Vanadium dioxide doped powder, and film and preparation method thereof
  • Vanadium dioxide doped powder, and film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] First prepare 80ml of vanadium pentoxide solution containing 0.001mol / L, add 0.001g of oxalic acid and stir to form a uniform solution. Put the solution into the reaction kettle, add the above solution and seal it. After reacting at 240°C for 24 hours, take it out after cooling, and centrifugally dry to obtain vanadium dioxide powder, whose chemical formula is VO 2 . Such as figure 1 The XRD spectrum shows that its crystal phase is M phase. The vanadium dioxide powder obtained in this example has a size of 50 nm and a phase transition temperature of 68°C.

Embodiment 2

[0054] First prepare 80ml of vanadium pentoxide solution containing 0.001mol / L, add 0.005g of oxalic acid and stir to form a uniform solution. Add 2.67 mg of MgNO to the solution 3 ·6H 2 O, stir evenly, put the above solution into the reaction kettle, add the above solution and seal it. After reacting at 240°C for 24 hours, take it out after cooling, and centrifugally dry to obtain vanadium dioxide powder, whose chemical formula is V 1.94 Mg 0.06 o 2 . Such as figure 1 Its crystal phase is M phase as shown in the XRD spectrum, as figure 2 As shown in the TEM photo, the prepared vanadium dioxide powder is also in the shape of a short rod with a size of 10-300nm. The phase transition temperature of the vanadium dioxide powder prepared in this embodiment is 55°C.

Embodiment 3

[0056]First prepare 80ml of vanadyl sulfate solution containing 0.001mol / L, and titrate with potassium hydroxide until a suspension appears. Add 5.33 mg of MgNO to the solution 3 ·6H 2 O, stir evenly, put the above solution into the reaction kettle, add the above solution and seal it. React at 240°C for 16 hours, take it out after cooling; centrifugally dry to obtain vanadium dioxide powder, whose chemical formula is V 1.9 Mg 0.1 o 2 . Such as image 3 As shown in the TEM photo, the prepared vanadium dioxide powder is also in the shape of a short rod with a size of 10-200nm. The crystal phase of the vanadium dioxide powder obtained in this example is M phase, and the phase transition temperature is 50°C.

[0057] Example, 4

[0058] First prepare 80ml of vanadyl sulfate solution containing 0.002mol / L, and titrate with potassium hydroxide until a suspension appears. Add 20 mg of MgNO to the solution 3 ·6H 2 O, stir evenly, put the above solution into the reaction ket...

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Abstract

The invention relates to a vanadium dioxide doped powder, and a film and a preparation method thereof. The chemical composition of the vanadium dioxide doped powder is V[1-x]M[x]O[2], x is greater than 0 and not greater than 0.5, M is a doped element, and the doped element is Mg or Al, and can be used for improving the optical performances of the vanadium dioxide doped powder and adjusting the phase transition temperature of the vanadium dioxide doped powder.

Description

technical field [0001] The invention relates to the preparation of vanadium dioxide powder in the fields of chemical industry and materials, in particular to doped vanadium dioxide powder, its preparation method and application. Background technique [0002] Under the situation of tightening global energy supply and deteriorating environment, energy conservation and emission reduction have become the common goal of all countries in the world. According to a report published by the United Nations Environment Program on December 11, 2009, one-third of global greenhouse gas emissions are related to building energy consumption. my country is a big energy-consuming country, and the annual energy consumption is equivalent to 1.5 billion tons of standard coal, of which about 30% is energy consumption for buildings. The most serious building energy consumption is glass, whose energy loss accounts for 50% of the entire building energy consumption. Therefore, by promoting energy sav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02B82Y30/00
Inventor 高彦峰周家东罗宏杰曹传祥金平实
Owner 江苏先进无机材料研究院
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