Intelligent temperature-control vanadium dioxide composite multifunctional thin film and preparation method thereof

A nano-composite and composite film technology, applied in the field of VO2 nano-composite films, can solve problems such as impact and low light transmittance, and achieve the effect of improving the transmittance in the visible light region and good infrared thermal characteristics

Active Publication Date: 2011-11-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For pure phase VO 2 Thin films, although they have good temperature control properties in the near-infrared and infrared bands, their low transmittance in the visible light band affects practical applications

Method used

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  • Intelligent temperature-control vanadium dioxide composite multifunctional thin film and preparation method thereof
  • Intelligent temperature-control vanadium dioxide composite multifunctional thin film and preparation method thereof
  • Intelligent temperature-control vanadium dioxide composite multifunctional thin film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] with V 2 o 5 Powder, benzyl alcohol and isopropanol were mixed at a molar ratio of 1:4:50, and stirred at 80°C for 2 hours to prepare a vanadium precursor; VO x Thin film (2.02 / Ar mixed atmosphere (hydrogen volume content 4%) for 3 hours, after natural cooling, crystallized VO can be formed 2film. SiO was prepared by sol-gel technique using analytically pure ethyl orthosilicate, absolute ethanol, ammonia and deionized water at a volume ratio of 1:10:0.2-0.5:0.1 2 Precursor sol; by pulling coating technology (speed is 50mm / min), prepare VO 2 / SiO 2 composite film, and then dried at 100°C for 10 min to obtain the desired VO 2 / SiO 2 nanocomposite films.

[0029] figure 1 Corresponding to VO 2 / SiO 2 SEM image of surface morphology of nanocomposite film, substrate / VO 2 、VO 2 / SiO 2 and SiO 2 There is a clear boundary between / air, which is marked by a black dotted line in the figure, SiO 2 Particle size is 20-50nm, VO 2 The grain size distribution is in ...

Embodiment 2

[0032] with V 2 o 5 Powder, benzyl alcohol and isopropanol were mixed in a molar ratio of 1:4:50, stirred at 80°C for 5 hours, and prepared by spin-coating coating technology (at a speed of 3000r / min). x Thin film (2.02 / Ar mixed atmosphere (hydrogen volume content 4%) for 3 hours, after natural cooling, crystallized VO can be formed 2 film. SiO was prepared by sol-gel technique using analytically pure ethyl orthosilicate, absolute ethanol, ammonia and deionized water at a volume ratio of 1:10:0.2-0.5:0.1 2 The precursor sol; By spin coating technology (speed is 3000r / min), prepare VO 2 nanocomposite film, and then dried at 100°C for 10 min to obtain the desired VO 2 / SiO 2 nanocomposite films. All the other are with embodiment 1.

Embodiment 3

[0034] with V 2 o 5 The powder, benzyl alcohol and isopropanol were mixed at a molar ratio of 1:4:50, and stirred at 80°C for 2 hours; at the same time, by sol-gel technique, analytically pure tetraethyl orthosilicate, absolute ethanol , ammonia water and deionized water, according to the volume ratio of 1:10:0.2-0.5:0.1 to prepare SiO 2 The precursor sol, and then under stirring conditions at room temperature, to obtain VO x -SiO 2 (2.0x -SiO 2 nanocomposite film, then at 410°C, H 2 / Ar mixed atmosphere (hydrogen volume content 4%) for 3 hours, after natural cooling, crystallized VO can be formed 2 -SiO 2 nanocomposite films. All the other are with embodiment 1.

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Abstract

The invention relates to an intelligent temperature-control vanadium dioxide nano composite multifunctional thin film and a preparation method thereof, and is characterized in that the nano composite thin film is VO2 / SiO2, VO2 / ZnO, VO2 / ZrO2 or VO2 / TiO2. The composite thin film consists of nano particles, wherein the size of the nano particles is kept between 10 and 500 nanometers, and the thickness of the composite thin film is 50 to 3,000 nanometers. In the invention, a wet chemical solution process is adopted, vanadium pentoxide (V2O5) powder serving as a precursor is uniformly dispersed and dissolved in a weakly reducing organic solvent to form a VOx thin film (x is more than 2.0 and less than 2.5), and the vanadium dioxide (VO2) thin film is formed by post treatment; and the nano composite thin film is prepared by a sol-gel technique. The VO2 nano composite thin film system based on co-doping and interface synergetic effect has high visible light transmittance, high infrared thermosensitive property, hydrophilic and photocatalytic functions and other functions, and a bright prospect.

Description

technical field [0001] The invention specifically relates to an intelligent temperature-controlled vanadium dioxide nanocomposite multifunctional film and a preparation method thereof, belonging to VO 2 field of nanocomposite films. Background technique [0002] Vanadium dioxide (VO 2 ) is a typical thermally induced phase change compound with a phase transition temperature of 68°C. Along with the phase transition, many optoelectronic properties such as resistivity, magnetic susceptibility, and light transmittance will undergo reversible mutations. These excellent properties make Thin films have extremely high application value in fields such as smart windows, photoelectric switches, laser protection, and optical storage. [0003] VO 2 The range of stable components is narrow, so the preparation of high-purity VO 2 Thin films are more difficult. A lot of work has been done to study VO for this 2 Film preparation. Currently VO 2 The preparation method of thin film mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23C04B41/50
Inventor 黄富强李德增丁尚军赵伟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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