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Method for preparing sodium-doped blue tungsten oxide nano-powder and dispersion liquid thereof

A technology of blue tungsten oxide and nanopowder, which is applied in the direction of tungsten oxide/tungsten hydroxide, nanotechnology for materials and surface science, nanotechnology, etc., which can solve the problems of poor performance batch stability, long reaction cycle, and efficiency Low and other problems, to achieve the effect of improving uniformity, increasing uniformity and fineness, and improving particle agglomeration

Inactive Publication Date: 2017-12-26
张春明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of large particles, long reaction cycle, low efficiency, poor performance batch stability and the like in the preparation of sodium-doped blue tungsten oxide nanomaterials in the prior art, and provide a method with uniform particle size and short reaction cycle. Preparation method of nano powder and dispersion liquid with high efficiency and high performance

Method used

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  • Method for preparing sodium-doped blue tungsten oxide nano-powder and dispersion liquid thereof
  • Method for preparing sodium-doped blue tungsten oxide nano-powder and dispersion liquid thereof
  • Method for preparing sodium-doped blue tungsten oxide nano-powder and dispersion liquid thereof

Examples

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Effect test

Embodiment 1

[0023] Example 1: According to the volume ratio of 1:0.01, 300ml of ethanol and 3ml of alcoholysis inhibitor nitric acid were premixed to form a mixed solution; the compound of sodium and tungsten was dosed according to the molar ratio of Na:W=0.01:1, and 5g was weighed Add sodium nitrate to the above mixed solution, stir evenly to form a suspension of sodium nitrate, then weigh 233.29g of tungsten chloride, add it to the suspension of sodium nitrate, stir at room temperature with a magnetic heating stirrer, and then put it into the planetary Grinding in a ball mill for 1 hour, after the alcoholysis of the tungsten compound is completed, take it out and dry it to obtain a solid-phase precursor; roast the solid-phase precursor in a hydrogen-argon reducing atmosphere at 400°C for 10 hours, and finally obtain a sodium-doped blue Tungsten oxide nanopowder Na 0.01 WO 3-δ ; The mixed slurry of 100g sodium-doped blue tungsten oxide, 5g organic polyphosphate dispersant and 895g deion...

Embodiment 2

[0024] Example 2: According to the volume ratio of 1:0.05, 300ml of ethanol and 15ml of alcoholysis inhibitor hydrochloric acid were premixed to form a mixed solution; the compound of sodium and tungsten was dosed according to the molar ratio of Na:W=0.5:1, and 2g was weighed Add sodium nitrate to the above mixed solution, stir evenly to form a suspension of sodium nitrate, then weigh 16.08g of tungsten oxychloride, add it to the suspension of sodium nitrate, stir at room temperature with a magnetic heating stirrer, and then put Grinding in a planetary ball mill for 5 hours, after the alcoholysis of the tungsten compound was completed, it was taken out and dried to obtain a solid-phase precursor; the solid-phase precursor was roasted in a hydrogen-argon reducing atmosphere at 500°C for 5 hours, and finally a sodium-doped blue Color tungsten oxide nanopowder Na 0.5 WO 3-δ The mixed slurry of 300g sodium-doped blue tungsten oxide, 30g propylene glycol block polyester dispersant...

Embodiment 3

[0025] Example 3: According to the volume ratio of 1:0.1, 300ml of ethanol and 30ml of alcoholysis inhibitor oxalic acid are premixed to form a mixed solution; the compound of sodium and tungsten is dosed according to the molar ratio of Na:W=1:1, and 20g is weighed Add sodium nitrate into the above mixed solution, stir evenly to form a suspension of sodium nitrate, then weigh 67.47g of tungsten dioxide dichloride, add it to the suspension of sodium nitrate, stir at room temperature with a magnetic heating stirrer, and then Put it into a planetary ball mill for grinding for 8 hours. After the alcoholysis of the tungsten compound is completed, take it out and dry it to obtain a solid-phase precursor; roast the solid-phase precursor in a hydrogen-argon reducing atmosphere at 650°C for 2 hours, and finally obtain a sodium-doped Blue tungsten oxide nanopowder NaWO 3-δ ;The mixed slurry of 600g sodium-doped blue tungsten oxide, 100g polyoxypropylene polyoxyethylene copolymer dispers...

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Abstract

The invention provides a method for preparing sodium-doped blue tungsten oxide nano-powder for infrared blockage and dispersion liquid of the nano-powder. The nano-powder is a hydrolysis product obtained by covering the surface of sodium nitrate with a layer of tungsten compound through the microsolubility of sodium nitrate in an alcohol system and the alcoholysis property of the tungsten compound by virtue of an in-situ hydrolysis coating technique. The method comprises the following steps: carrying out batching according to a molar ratio that Na / W is equal to 0.1-1, adding the materials into alcohol mixed with an alcoholysis inhibitor, slowly stirring, putting the material into a planetary ball mill, grinding, taking out, and drying so as to obtain a solid-phase precursor; and finally, roasting the obtained solid-phase precursor in a hydrogen argon reduction atmosphere at 400-650 DEG C for 2-10 hours, so as to obtain the sodium-doped blue tungsten oxide nano-powder. Based on the preparation of the nano-powder, sodium-doped blue tungsten oxide nano-dispersion liquid with a solid content of 10%-60% is prepared from sodium-doped blue tungsten oxide by virtue of a nano-grinding technique. The nano-powder or the dispersion liquid can be applied to the fields of heat-insulating films of electronic parts and components, buildings or vehicle windows and the like and has a good infrared blockage effect.

Description

technical field [0001] The invention relates to a preparation method of sodium-doped blue tungsten oxide nanopowder and its dispersion liquid, in particular to a method for preparing sodium-doped blue powder with high uniformity for infrared blocking by using in-situ hydrolysis coating technology. The invention discloses a preparation method of colored tungsten oxide nanopowder and its dispersion liquid. Background technique [0002] Infrared light, especially near-infrared light, has an obvious thermal effect, which can easily lead to a rise in temperature, resulting in an increase in temperature such as in a room or in a car. The currently disclosed infrared blocking materials generally refer to a class of functional materials that can strongly absorb or reflect infrared light without affecting the transmission of visible light. The reported inorganic materials with strong infrared absorption or reflection properties mainly focus on several oxides, such as antimony tin ox...

Claims

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Application Information

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IPC IPC(8): C01G41/02B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G41/02C01P2002/54C01P2004/03C01P2004/62C01P2004/64C01P2006/66
Inventor 张春明
Owner 张春明
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