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a zn doped vo 2 Powder and method for preparing composite film by using the powder

A composite film, VO2 technology, applied in the direction of coating, vanadium oxide, etc., can solve the problem of visible light transmittance reduction, etc., to achieve good thermally induced phase change visible light antireflection, visible light transmittance increase, good thermally induced phase change characteristic effect

Active Publication Date: 2022-05-27
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

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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  • a zn doped vo <sub>2</sub> Powder and method for preparing composite film by using the powder
  • a zn doped vo <sub>2</sub> Powder and method for preparing composite film by using the powder
  • a zn doped vo <sub>2</sub> Powder and method for preparing composite film by using the powder

Examples

Experimental program
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Embodiment 1

[0047] (1) Zn 0.16 VO 2 Powder preparation: 3.64 g of vanadium pentoxide and 5.0428 g of oxalic acid dihydrate were dispersed in 100 mL of deionized water, and 1.4048 g of zinc acetate dihydrate was added to obtain a reaction precursor solution; the reaction precursor solution was reacted at 240 ° C for 10 hours, and the The reacted precipitate was washed with water and alcohol in turn, filtered with vacuum suction, 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 was obtained 0.16 VO 2 powder.

[0048] (2) Zn 0.16 VO 2 Thin film preparation: take 0.4g Zn 0.16 VO 2 To the powder, add 10 mL of anhydrous ethanol, and after ball-milling dispersion treatment, extract 5 mL of ball-milling fluid, mix with 20 mL of anhydrous ethanol and 12.5 mL of polyurethane resin, and mix for 20 minutes to obtain a coating liquid, which is uniformly coated on the powder by roller coating. glass substrate surface to obtain Zn...

Embodiment 2

[0051] (1) Zn 0.08 VO 2 Powder preparation: 3.64 g of vanadium pentoxide and 5.0428 g of oxalic acid dihydrate were dispersed in 100 mL of deionized water, and 0.7024 g of zinc acetate dihydrate was added to obtain a reaction precursor solution; the reaction precursor solution was reacted at 240 ° C for 10 hours, The reacted precipitate was washed with water and alcohol in turn, filtered with vacuum suction, 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 was obtained 0.08 VO 2 powder.

[0052] (2) Zn 0.08 VO 2 Thin film preparation: take 0.4gZn 0.08 VO 2 To the powder, add 10 mL of anhydrous ethanol, and after ball-milling dispersion treatment, extract 5 mL of ball-milling fluid, mix with 20 mL of anhydrous ethanol and 12.5 mL of polyurethane, and mix and stir for 20 minutes to obtain a coating liquid. surface of the glass slide to obtain Zn 0.08 VO 2 composite film.

[0053] The test results show t...

Embodiment 3

[0055] (1) Zn 0.02 VO 2 Powder preparation: 3.64 g of vanadium pentoxide and 5.0428 g of oxalic acid dihydrate were dispersed in 100 mL of deionized water, and 0.1756 g of zinc acetate dihydrate was added to obtain a reaction precursor solution; the reaction precursor solution was reacted at 240 ° C for 10 hours, The reacted precipitate was washed with water and alcohol in turn, filtered with vacuum suction, 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 was obtained 2 powder.

[0056] (2) Zn 0.02 VO 2 Film preparation: the same as step (2) in Example 1.

[0057] The test results show that the Zn prepared by the above method 0.02 VO 2The crystal 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 spherical large particles, Zn 0.08 VO 2 Powder...

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Abstract

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. A Zn-doped VO 2 The preparation method of the powder, the V 2 o 5 Disperse the powder and organic acid in the solvent, then add the doping precursor to obtain the reaction precursor; carry out the solvothermal reaction of the reaction precursor at 180-280°C for 8-24 hours, and wash the precipitates formed after the reaction with water in turn , alcohol washing, vacuum filtration, and drying at 60°C to 80°C for 10 to 24 hours; then in N 2 After heat treatment at 450-750°C for 0.5-3 hours under protection, Zn-doped VO 2 Powder, the main crystal phase of the powder is M phase VO 2 , has good thermally induced phase transition characteristics, from M-phase VO 2 → R-phase VO 2 The phase transition temperature of VO is lower than 68.5℃, and Zn doping makes VO 2 The visible light transmittance and solar light adjustment ability of the powder are further improved after thermally induced phase change.

Description

technical field [0001] The present invention relates to a kind of Zn-doped VO 2 The powder and the method for preparing a composite film by using the powder belong to the fields of new materials and energy saving and environmental protection. Background technique [0002] With the rapid development of 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. The energy consumption per unit area of ​​buildings in my country is much higher than that in developed countries in Europe and the United States. According to the survey results, the electricity consumption of residential and commercial air conditioners in China accounts for 34% of the global electricity consumption of air conditioners and 9.6% of the national total electricity consumption. The window is the main channel for energy exchange between buildings and vehicles and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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