CsxWOyFz powder and preparation method thereof

A WO3-F, powder technology, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problems of inability to large-scale production, harsh reaction conditions, etc., to reduce unsafe factors, mild reaction conditions, preparation The effect of method science

Active Publication Date: 2014-04-09
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to propose a Cs x WO y f z The preparation method

Method used

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  • CsxWOyFz powder and preparation method thereof
  • CsxWOyFz powder and preparation method thereof
  • CsxWOyFz powder and preparation method thereof

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preparation example Construction

[0037] The Cs x WO y f z The preparation method of the powder is hydrothermal synthesis, which specifically includes the following steps:

[0038] (1) Mix tungstic acid solution and fluorine source solution according to F / W molar ratio of 0.11~1, and keep stirring for 0.5~2h, add organic acid to form WO 3 -F composite sol, prolonging the stirring time is conducive to the full incorporation of fluoride ions;

[0039] The preparation of the tungstic acid solution comprises the following steps: washing the hydrochloric acid-activated cation exchange resin with water to neutrality, then slowly passing the sodium tungstate through the cation exchange resin, and finally obtaining a light yellow tungstic acid solution. The concentration of the tungstic acid solution is 0.25-0.75 mol / L, preferably the concentration of the tungstic acid solution is 0.5 mol / L.

[0040] The fluorine source in the present invention is hydrofluoric acid or sodium fluoride. Hydrofluoric acid and sodium...

Embodiment 1

[0060] Take the insulation material with Cs:W:F (molar ratio)=0.33:1:0.11 prepared in a 200ml autoclave as an example

[0061] 6.60g sodium tungstate Na 2 WO 4Add it to 40ml deionized water to prepare a 0.5mol / L transparent sodium tungstate solution. Then pass 40ml of sodium tungstate solution through the activated cation exchange resin to obtain light yellow tungstic acid liquid A1 with a pH of 1-1.5. Take 1ml of analytical pure hydrofluoric acid solution and add it to 102ml of deionized water to prepare 0.22mol / L hydrofluoric acid solution B1. Add 10ml of the B1 solution into the A1 solution, and keep stirring for 30-60 minutes to obtain the mixed solution A2. Take 25.4g of citric acid and add directly into the A2 solution, keep stirring until the solution is clear, then add deionized water until the volume of the solution is 100ml, and obtain the solution A3. Take 1.076g of cesium carbonate and add it into 10ml of deionized water to obtain solution C1. The C1 solution ...

Embodiment 2

[0063] Take the insulation material with Cs:W:F (molar ratio)=0.33:1:0.28 prepared in a 200ml autoclave as an example

[0064] 6.60g sodium tungstate Na 2 WO 4 Add it to 40ml deionized water to prepare a 0.5mol / L transparent sodium tungstate solution. Then pass 40ml of sodium tungstate solution through the activated cation exchange resin to obtain light yellow tungstic acid liquid A1 with a pH of 1-1.5. Take 1ml of analytical pure hydrofluoric acid solution and add it to 102ml of deionized water to prepare 0.22mol / L hydrofluoric acid solution B1. Add 25.5ml of the B1 solution into the A1 solution, and keep stirring for 30-60 minutes to obtain the mixed solution A2. Take 25.4g of citric acid and add directly into the A2 solution, keep stirring until the solution is clear, then add deionized water until the volume of the solution is 100ml, and obtain the solution A3. Take 1.076g of cesium carbonate and add it into 10ml of deionized water to obtain solution C1. The C1 soluti...

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Abstract

The invention provides CsxWOyFz powder and a preparation method thereof. The preparation method of the CsxWOyFz powder comprises the following steps: mixing a tungstic acid solution with a fluorine source solution, and adding organic acid to form a WO3-F composite sol; adding a Cs2CO3 solution to the WO3-F composite sol to form a Cs-WO3-F composite sol; putting the Cs-WO3-F composite sol in a high-pressure kettle, and carrying out hydrothermal reaction for 1-3 days at the temperature of 180-200 DEG C; and sequentially carrying out centrifugation, water washing, alcohol washing and drying on the reactant to obtain the CsxWOyFz powder. The preparation method provided by the invention has the advantages of no need for high temperature hydrogen reduction, simple process, low cost, little toxicity and benefit of scale production and practical application. The CsxWOyFz powder prepared by adopting the method has the advantages of excellent visible light transmission performance and near infrared shielding performance and broad application prospect in the aspects of light transmitting and heat insulating of buildings and automobile window glasses.

Description

technical field [0001] The invention relates to material preparation technology, in particular to a Cs x WO y f z Powder and its preparation method. Background technique [0002] Modern industrial production and human life consume a lot of energy and produce a lot of carbon dioxide. It is well known that too much carbon dioxide can lead to the greenhouse effect, an increase in global temperature. In summer, when electricity consumption reaches its peak, the use of air conditioners to cool indoor temperatures accounts for more than half of the average household's daytime electricity consumption. Therefore, how to reduce the use of air conditioners is a key point in promoting an environmentally friendly society. [0003] According to reports, during the daytime in summer, the heat entering the room from openings such as windows accounts for 73% of the total heat. The heat introduced from the window mainly comes from sunlight, so to block the heat from entering through th...

Claims

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Application Information

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IPC IPC(8): C01G41/00C09D5/32
Inventor 刘敬肖史非罗嘉宇
Owner DALIAN POLYTECHNIC UNIVERSITY
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