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Doped vanadium dioxide powder and film and preparation method thereof

A technology of vanadium dioxide and powder, which is applied in the field of vanadium dioxide powder preparation, can solve the problems of little attention to the optical properties and color of thin films, not suitable for large-scale production, complicated control process, etc., to maintain visible light transmittance And solar control performance, good high and low temperature infrared control performance, low reaction temperature effect

Active Publication Date: 2016-01-06
江苏先进无机材料研究院
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Vanadium dioxide thin films are usually prepared by sputtering, chemical vapor deposition, ion implantation, sol-gel methods, etc. However, these methods have disadvantages such as high cost, complicated control process, and not suitable for large-scale production.
On vanadium dioxide doped powders, most of the work is focused on the study of doping to reduce the phase transition temperature of vanadium dioxide, no attention is paid to the effect of doping on its electrical properties, and little attention is paid to improving the powder by doping Optical properties and color of films made from powders
At present, the doping of vanadium dioxide powder is mainly concentrated in the research of positive ion doping, and the research of negative ion doping is basically absent.

Method used

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  • Doped vanadium dioxide powder and film and preparation method thereof
  • Doped vanadium dioxide powder and film and preparation method thereof
  • Doped vanadium dioxide powder and film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Fluorine-doped vanadium dioxide powder doped with 20% molar percentage

[0065] 10gVOSO 4 Powder and 3gNH 4 Dissolve F in 50ml of deionized water, titrate with 1mol / L NaOH solution, and keep stirring. After the titration is complete, put the suspension into a 50ml hydrothermal kettle filled with 45ml of deionized water, and conduct a hydrothermal reaction at 230°C for 96 Hours, centrifuged and dried to obtain fluorine-doped vanadium dioxide powder, the molar ratio of fluorine atoms was 20% through elemental analysis. Such as figure 1 The crystal phase shown in the XRD spectrum is pure M phase. From figure 2 In TEM, it can be found that the fluorine-doped vanadium dioxide is granular, with a size of about 30nm. Such as image 3 The DSC curve shows that the fluorine-doped vanadium dioxide powder has a phase transition property, and the phase transition temperature drops to 35°C, indicating that fluorine doping can effectively reduce the phase transition temperature...

Embodiment 2

[0067] Chlorine-doped vanadium dioxide powder doped with 10% molar percentage

[0068] 10gVOC 2 o 4 ·5H 2 Dissolve O powder and 2g KCl in 50ml deionized water, titrate with 1mol / L NaOH solution, and keep stirring. After the titration is complete, put the suspension into a 50ml hydrothermal kettle filled with 45ml deionized water, at 300°C The hydrothermal reaction was carried out for 12 hours, and the chlorine-doped vanadium dioxide powder was obtained by centrifuging and drying, and the molar ratio of chlorine atoms was 10% through elemental analysis. Figure 4 The phase of the chlorine-doped vanadium dioxide powder shown is M phase, the phase transition temperature of the powder is 45°C, the particle size is 40nm, and the carrier concentration is 3.2×10 when the powder is pressed into tablets at 25°C 18 cm -3 .

Embodiment 3

[0070] Bromine-doped vanadium dioxide powder doped with 12% molar percentage

[0071] 10gVOCl 2 Dissolve the powder and 3gNaBr in 50ml deionized water, titrate with 1mol / L NaOH solution, and keep stirring. After the titration is complete, put the suspension into a 50ml hydrothermal kettle filled with 45ml deionized water. Thermally reacted for 12 hours, centrifuged and dried to obtain bromine-doped vanadium dioxide powder, the molar ratio of bromine atoms was 12% through elemental analysis. The phase of bromine-doped vanadium dioxide powder is M phase, the phase transition temperature is 50°C, the particle size is 50nm, and the carrier concentration is 6.1×10 when the powder is pressed into tablets at 25°C 17 cm -3 .

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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 VO[1-x]M[x], x is greater than 0 and not greater than 0.5, M is a doped element, and the doped element is F, S, Cl, Br or I, and can be used for improving the morphology, the phase transition temperature, the electric performances and the optical performances 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 and film, and a preparation method and application thereof. Background technique [0002] At present, the world's energy demand is increasing by 2% per year, and about 30% of this energy is consumed in buildings. Taking my country as an example, building energy consumption has accounted for 27.6% of the total energy consumption in society, and the resulting energy consumption and environmental pollution have continued to intensify. Glass is the main channel for heat and light energy exchange between buildings and the outside world. Heat exchange through glass windows accounts for 48% and 71% of the total energy exchange in winter and summer respectively. Therefore, the development of energy-saving glass is expected to greatly reduce building energy consumption. [0003] So far, there are m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02B82Y30/00
Inventor 高彦峰陈石戴雷罗宏杰金平实曹传祥
Owner 江苏先进无机材料研究院
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