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Zn-doped VO2 powder and method for preparing composite film by using powder

A composite film, VO2 technology, applied in the direction of vanadium oxide, coating, etc., can solve the problem of visible light transmittance reduction, etc., to achieve good heat-induced phase change visible light anti-reflection, good intelligent dimming function, visible light transmittance increase Effect

Active Publication Date: 2021-06-08
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem that the visible light transmittance of the vanadium dioxide-based thin film is reduced after the thermally induced phase transition due to element doping, the present invention aims to provide a Zn-doped VO 2 The preparation method of powder and its composite film is characterized in that Zn-doped VO is prepared by two-step method of hydrothermal / solvothermal and post-heat treatment 2 Powder and Preparation of Organic Composite Zn-doped VO 2 film

Method used

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  • Zn-doped VO2 powder and method for preparing composite film by using powder
  • Zn-doped VO2 powder and method for preparing composite film by using powder
  • Zn-doped VO2 powder and method for preparing composite film by using powder

Examples

Experimental program
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Effect test

Embodiment 1

[0049] (1)Zn 0.16 VO 2 Powder preparation: Disperse 3.64g of vanadium pentoxide and 5.0428g of oxalic acid dihydrate in 100mL of deionized water, add 1.4048g of zinc acetate dihydrate to obtain a reaction precursor; react the reaction precursor at 240°C for 10 hours, and The reacted precipitate was washed with water and alcohol in turn, vacuum filtered, and dried at 60°C for 12 hours; then placed in N 2 After heat treatment at 680°C for 3 hours under protection, Zn 0.16 VO 2 Powder.

[0050] (2)Zn 0.16 VO 2 Film preparation: take 0.4g Zn 0.16 VO 2 Powder, add 10mL of absolute ethanol, after ball milling dispersion treatment, extract 5mL of ball milling liquid, 20mL of absolute ethanol, 12.5mL of polyurethane resin and mix and stir for 20min to obtain a coating solution, and use the roller coating method to evenly coat the coating solution on the glass substrate surface, thus obtaining Zn 0.16 VO 2 film.

[0051] Test result shows, the Zn prepared by above-mentioned ...

Embodiment 2

[0053] (1)Zn 0.08 VO 2 Powder preparation: Disperse 3.64g of vanadium pentoxide and 5.0428g of oxalic acid dihydrate in 100mL of deionized water, add 0.7024g of zinc acetate dihydrate to obtain a reaction precursor; react the reaction precursor at 240°C for 10 hours, The precipitate after the reaction was washed with water and alcohol in sequence, vacuum filtered, and dried at 60°C for 12 hours; then placed in N 2 After heat treatment at 680°C for 3 hours under protection, Zn 0.08 VO 2 Powder.

[0054] (2)Zn 0.08 VO 2 Film preparation: Take 0.4g Zn 0.08 VO 2 Powder, add 10mL of absolute ethanol, after ball milling dispersion treatment, extract 5mL of ball milling liquid, 20mL of absolute ethanol, 12.5mL of polyurethane and mix and stir for 20min to obtain a coating solution, and use the roller coating method to evenly coat the coating solution on the carrier surface of the glass slide, thus obtaining Zn 0.08 VO 2 Composite film.

[0055] Test result shows, the Zn pr...

Embodiment 3

[0057] (1)Zn 0.02 VO 2 Powder preparation: Disperse 3.64g of vanadium pentoxide and 5.0428g of oxalic acid dihydrate in 100mL of deionized water, add 0.1756g of zinc acetate dihydrate to obtain a reaction precursor; react the reaction precursor at 240°C for 10 hours, The precipitate after the reaction was washed with water and alcohol in sequence, vacuum filtered, and dried at 60°C for 12 hours; then placed in N 2 After heat treatment at 680 °C for 3 h under protection, Zn-doped VO 2 Powder.

[0058] (2)Zn 0.02 VO 2 Film preparation: same as step (2) in Example 1.

[0059]Test result shows, the Zn prepared by above-mentioned method 0.02 VO 2 The crystal phase structure of the powder is M phase VO 2 , the particles are approximately spherical large particles with a rough surface and a diameter of 5-10 μm, and some small particles are attached to the surface of the large spherical particles, Zn 0.08 VO 2 The powder is composed of M phase VO 2 Converted to R-phase VO ...

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Abstract

The invention relates to Zn-doped VO2 powder and a method for preparing a composite film by using the powder, which belong to the field of new materials and energy conservation and environmental protection. The preparation method of Zn-doped VO2 powder comprises the following steps of dispersing V2O5 powder and organic acid in a solvent, and adding a doped precursor to obtain a reaction precursor solution, carrying out solvothermal reaction on the reaction precursor solution at 180-280 DEG C for 8-24 hours, sequentially carrying out water washing and alcohol washing on precipitates generated after the reaction, carrying out vacuum filtration, and drying at 60-80 DEG C for 10-24 hours, and carrying out heat treatment for 0.5-3 hours at 450-750 DEG C under the protection of N2 to obtain Zn-doped VO2 powder. The main crystal phase of the powder is M-phase VO2, the powder has good thermally induced phase change characteristic, the phase transition temperature from M-phase VO2 to R-phase VO2 is lower than 68.5 DEG C, and the visible light transmittance and sunlight regulation capability of the VO2 powder after thermally induced phase change are further improved by Zn doping.

Description

technical field [0001] The invention relates to a Zn-doped VO 2 A powder and a method for preparing a composite film by using the powder belong to the fields of new materials, energy saving and environmental protection. Background technique [0002] With the rapid development of the economy, energy consumption is increasing day by day, among which building energy consumption occupies a large proportion. Building energy consumption is mainly used for lighting, heating and cooling. my country's building energy consumption per unit area is much higher than that of developed countries in Europe and America. According to the survey results, China's residential and commercial air-conditioning electricity consumption accounts for 34% of the global air-conditioning electricity consumption, accounting for 9.6% of the country's total electricity consumption. The window is the main channel for energy exchange between buildings and vehicles and the outside world, accounting for 50% of...

Claims

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Application Information

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IPC IPC(8): C03C17/00C01G31/02
CPCC03C17/009C03C17/007C01G31/02C03C2218/118
Inventor 刘敬肖史非康佳宏董禹彤
Owner DALIAN POLYTECHNIC UNIVERSITY
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