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Method for improving WO3 film gaschromic cycle performance

A cycle performance and film technology, applied in the field of improving the gas-induced cycle performance of WO3 film

Active Publication Date: 2012-05-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, there is no WO3 / SiO2 two-phase dispersed doping technology to improve the amorphous WO 3 Related patent reports on aerochromic properties of thin film materials

Method used

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  • Method for improving WO3 film gaschromic cycle performance
  • Method for improving WO3 film gaschromic cycle performance
  • Method for improving WO3 film gaschromic cycle performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Preparation of two-phase mixed doped WO3 / SiO 2 film, the specific steps are as follows:

[0062] (1) WO 3 Sol preparation:

[0063] Using the sol-gel method, under normal temperature and pressure, tungsten powder and hydrogen peroxide solution were stirred and reacted for 50-70 minutes, the molar ratio of tungsten powder and hydrogen peroxide was 1:3-1:4, centrifuged and filtered to obtain Light yellow transparent solution; then add absolute ethanol to the resulting solution, the amount of absolute ethanol added is 1 / 2 to 4 / 5 of the volume of the container, and reflux in an oil bath at 75-85°C for 1.5-2 hours until the sol is transformed into Orange, that is, get WO 3 ethanol sol.

[0064] (2) Preparation of acidic catalytic SiO2 sol

[0065] Accurately measure deionized water, absolute ethanol (Eth), and tetraethyl orthosilicate (TEOS) with a volumetric flask and a pipette. The ratio is: 23.5 / 100 / 77.8; Measure concentrated hydrochloric acid to prepare ...

Embodiment 2

[0075] Example 2: Preparation of two-phase mixed doped WO3 / SiO 2 Film preparation

[0076] (1) WO 3 Sol preparation:

[0077] Using the sol-gel method, under normal temperature and pressure, tungsten powder and hydrogen peroxide solution were stirred and reacted for 50-70 minutes, the molar ratio of tungsten powder and hydrogen peroxide was 1:3-1:4, centrifuged and filtered to obtain Light yellow transparent solution; then add absolute ethanol to the resulting solution, the amount of absolute ethanol added is 1 / 2 to 4 / 5 of the volume of the container, and reflux in an oil bath at 75-85°C for 1.5-2 hours until the sol is transformed into Orange, that is, get WO 3 ethanol sol.

[0078] (2) Preparation of acidic catalytic SiO2 sol

[0079] Accurately measure deionized water, absolute ethanol (Eth), and tetraethyl orthosilicate (TEOS) with a volumetric flask and a pipette. The ratio is: 23.5 / 100 / 77.8; Measure concentrated hydrochloric acid (or nitric acid, oxalic acid, phosp...

Embodiment 3

[0089] Example 3: Preparation of two-phase mixed doped WO3 / SiO 2 Film preparation

[0090] (1) WO 3 Sol preparation:

[0091] Using the sol-gel method, under normal temperature and pressure, tungsten powder and hydrogen peroxide solution were stirred and reacted for 50-70 minutes, the molar ratio of tungsten powder and hydrogen peroxide was 1:3-1:4, centrifuged and filtered to obtain Light yellow transparent solution; then add absolute ethanol to the resulting solution, the amount of absolute ethanol added is 1 / 2 to 4 / 5 of the volume of the container, and reflux in an oil bath at 75-85°C for 1.5-2 hours until the sol is transformed into Orange, that is, get WO 3 ethanol sol.

[0092] (2) Preparation of basic catalytic SiO2 sol

[0093] The raw materials and proportions (molar ratio) required for the preparation of SiO2 sol by basic catalytic method are as follows: ethyl orthosilicate (TEOS): ethanol (EtOH): ammonia water (NH3 H2O) = 1 / 38 / 2.45, the preparation process of t...

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Abstract

The invention belongs to the technical field of the environmental and energy-saving material and relates to a method for improving WO3 films gaschromic cycle performance by doping WO3 sol with inorganic substances which can increase the porosity of WO3 gaschromic films; wherein, the inorganic substances contain SiO2, Al2O3, P2O5, Fe2 O3 and CuO2. Sol-gel method is adopted to prepare stable WO3 composite sol; the pulling method or spin-coating technique is used to plate transparent and uniform composite catalyst-doped WO3 porous films on common glass. Compared with the untreated films, the gaschromic films which are prepared from the doped and combined sol has dramatically increased gaschromic cycle performance; compared with the gaschromic films which are prepared by magnetron sputtering and other methods, the performance of the films prepared by the invention is the same and the cost is largely reduced; compared with the electrochomeric films, the films have the same advantages. The method makes up for detects of the gaschromic smart window which is prepared by sol-gel method so that the smart window technology tends to be more mature.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy-saving materials, and relates to WO 3 Thin film aerochromic technology, especially to improve WO 3 A method for thin-film gas-induced cycle performance. Background technique [0002] At present, energy shortage has become an issue of increasing concern to governments at all levels, and the use of clean, renewable, safe and reliable energy is imminent. Buildings are one of the units with high energy consumption. In my country, their energy consumption has reached 27.6% of the total energy consumption of the society and will exceed 33%. 40% of the energy loss is caused by windows, which is 2-3 times that of developed countries. . According to statistics, under heating or air conditioning conditions, the heat lost by single glass windows in winter accounts for about 30-50% of the heat load, and in summer, the cooling energy consumed due to solar radiation heat entering t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
Inventor 吴广明高国华梁田张增海史继超沈军周斌倪星元张志华
Owner TONGJI UNIV