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A three-dimensional ordered porous network structure of vo 2 Thin film and its preparation method and application

A porous network, three-dimensional ordered technology, applied in the direction of coating, vanadium oxide, etc., can solve the problems of film cracks and peeling, and achieve the effect of improved repeatability, difficult peeling, and strong controllability

Active Publication Date: 2020-03-17
西安艾斯达特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Essentially, when VO 2 When the monoclinic-tetragonal phase transition occurs with temperature, it is bound to be accompanied by a volume change, and the stress introduced repeatedly may cause the film to crack or even peel off from the glass substrate

Method used

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  • A three-dimensional ordered porous network structure of vo <sub>2</sub> Thin film and its preparation method and application
  • A three-dimensional ordered porous network structure of vo <sub>2</sub> Thin film and its preparation method and application
  • A three-dimensional ordered porous network structure of vo <sub>2</sub> Thin film and its preparation method and application

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preparation example Construction

[0042] The preparation process of this thin film comprises the following steps:

[0043] (1) Use quartz glass with high light transmittance as the substrate for cleaning treatment. Concretely comprise the following steps: after the quartz glass with high light transmittance is respectively ultrasonically treated in acetone and ethanol for 20 to 90 minutes, in piranha solution (H 2 SO 4 :H 2 o 2 =7:3) for 5 to 30 minutes, ultrasonically treated in deionized water for 30 to 60 minutes; cleaned high-transmittance quartz glass as a substrate for later use.

[0044] (2) Using the vertical dipping method, polystyrene (PS) microspheres are self-assembled and arranged on a glass substrate to form a VO 2 Film template. The specific process of this step is, commercially purchased or homemade PS ball emulsion, the size of PS balls in the general PS ball emulsion is 200-1500nm, the size of PS balls directly affects the size of the holes in the three-dimensional network structure; dil...

Embodiment 1

[0049] (1) The quartz sheet was ultrasonically treated in acetone and ethanol for 30 minutes respectively, soaked in piranha solution for 30 minutes, and then ultrasonically treated in deionized water for 30 minutes for later use;

[0050] (2) Add 2mL of PS sphere emulsion into 50mL of deionized water and ultrasonically disperse for 2 hours to prepare the PS sphere dilution, hang the quartz glass cleaned in step (1) vertically and dip it in the PS sphere dilution, and place it in the air to dry box, and evaporated at 60°C for 10 hours to form a PS sphere template.

[0051] (3) in 60mLCH 3 OH solution, add vanadium source, 4mL HCl and 0.25mLN 2 h 4 , to prepare V 2 o 5 Concentration is the precursor solution of 22.6mmol / L; Wherein CH 3 The volume ratio of OH and HCl is 15:1, CH 3 OH and N 2 h 4 The volume ratio is 60:0.25.

[0052] (4) Soak the self-assembled PS sphere template in VO at room temperature 2 In the blue precursor solution for 3h, remove it. Place in a b...

Embodiment 2

[0055] (1) The quartz sheet was ultrasonically treated in acetone and ethanol for 30 minutes respectively, soaked in piranha solution for 30 minutes, and then ultrasonically treated in deionized water for 30 minutes for later use;

[0056](2) Add 2 mL of PS sphere emulsion into 50 mL of deionized water and ultrasonically disperse for 2 hours to prepare a PS sphere dilution. Hang and immerse the cleaned quartz glass in step (1) in the PS sphere dilution, and place it in a blast drying oven. Evaporated at 60°C for 12 hours to form a PS sphere template.

[0057] (3) in 60mLCH 3 OH solution, sequentially add vanadium source, 8mL HCl and 0.5mLN 2 h 4 , to prepare V 2 o 5 Concentration is the precursor solution of 33.9mmol / L; Wherein CH 3 The volume ratio of OH and HCl is 15:2, CH 3 OH and N 2 h 4 The volume ratio is 60:0.5.

[0058] (4) Soak the self-assembled PS sphere template in VO at room temperature 2 In the blue precursor solution for 5h, remove it. Place in a blas...

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Abstract

The invention discloses a VO2 film with a three-dimensional ordered porous network structure, and a preparation method and application thereof. The method stacks polystyrene microspheres on a glass substrate through a vertical immersion method, so that a die plate preparing a VO2 film can be formed; the die plate is immersed into a VO2 precursor solution, so that the slit between the polystyrene microspheres can be fully filled with V2O5 in the precursor solution; the V2O5 is converted into VO2 through follow-up drying and annealing process; the polystyrene microspheres are heated to evaporate, and the VO2 can form a three-dimensional ordered porous network shape; and the film has a complete three-dimensional ordered porous network structure. As the whole structure has holes, the holes canseparate fractures generated between VO2 particles on some frame, so that fracture force can be separated, and phase transition stress can be diluted.

Description

【Technical field】 [0001] The invention belongs to VO 2 The field of thermally induced phase change smart glass, involving a VO with a three-dimensional ordered porous network structure 2 Thin films and their methods of preparation and applications. 【Background technique】 [0002] my country is facing huge energy consumption and energy crisis, among which building energy consumption accounts for about 38%, while air conditioning accounts for about 55% of building energy consumption. Air conditioners are mainly used for cooling and heating indoors to maintain a suitable temperature, but the energy consumption caused by them cannot be ignored. How to find an energy-saving and environment-friendly way to regulate the indoor temperature is an urgent problem to be solved. [0003] VO 2 It has excellent thermally induced phase transition properties. When the temperature is lower than the phase transition temperature, its crystal is an insulator phase with a monoclinic structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/25C01G31/02
CPCC01G31/02C01P2004/20C01P2006/17C01P2006/60C03C17/25C03C2217/228C03C2218/111C03C2218/32
Inventor 马飞庄白妞戴正飞徐慧妍
Owner 西安艾斯达特新材料科技有限公司
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