Process for producing tin-stibium oxide ultra-fine nano-powder

An ultra-fine nanometer and oxide technology, which is applied in chemical instruments and methods, tin oxide, gallium/indium/thallium compounds, etc., can solve the problems of powder performance degradation, hard agglomeration, and affecting the performance of ATO powder, so as to eliminate Hard agglomeration, efficient doping, effect of preventing direct contact

Inactive Publication Date: 2009-05-13
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

The advantage of the co-precipitation method is that it is simple to operate, low in raw material and process costs, and suitable for mass production. The disadvantage is that high-temperature calcination is easy to form hard agglomeration between crystal grains, which seriously affects the performance of ATO powder; the second is to directly synthesize it by hydrothermal method (CN 1558426A)
Although the hydrothermal method can eliminate the hard agglomeration phenomenon, because it is prepared in a supercritical state, the doping of ATO nanopowder is in a metastable state, and its performance has a certain timeliness, that is, the performance of the powder will appear significantly over time. decline

Method used

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  • Process for producing tin-stibium oxide ultra-fine nano-powder

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Experimental program
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Embodiment 1

[0017] Take 21g SnCl 4 ·5H 2 O and 2.7 g SbCl 3 Dissolve in 300ml of ethylene glycol, add 9.6g of NaOH after complete dissolution, then heat treatment at 170°C for 2 hours, the solution changes from the original colorless transparent clear liquid to brown transparent liquid, after cooling to room temperature, in the process of mechanical stirring Slowly add 200ml of distilled water to completely precipitate the ATO precursor generated by the reaction. The light yellow precipitate was centrifuged, washed with water, and washed with ethanol, and then dried in an oven at 80°C for 10 hours to obtain a yellow, loose ATO precursor powder. The precursor powder was calcined in a tubular resistance furnace at 400°C and 600°C for 1h, respectively, to obtain dark blue ATO powder.

[0018] Use the powder X-ray diffractometer to measure the XRD pattern of the precursor and the calcined ATO powder at different temperatures, such as figure 1 shown. Analyzing the XRD diffraction spectra ...

Embodiment 2

[0021] Take 1g of ATO nanopowder and 100g of distilled water to prepare a suspension with a solid content of 1wt%, ultrasonically disperse in an ultrasonic cleaner with a power of 80W for 10 minutes, then take out 10ml and put it in a 10ml graduated cylinder, and place it at room temperature for a week without obvious settlement Or precipitate, which proves that this ATO ultrafine nanopowder has good dispersion stability.

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Abstract

The invention relates to a preparation method of tin-antimony oxide superfine nanometer powder, which is characterized in that the method comprises the following steps: firstly, dissolving tin inorganic salt, antimony inorganic salt and sodium hydroxide in an ethylene glycol solvent; heating up till the color of the solution is changed into yellow and deposition occurs; secondly, cooling mixed liquor and adding distilled water, stirring for one hour, and fully separating out the deposition; thirdly, cleaning the deposition after being centrifuged with ethanol for more times, and obtaining the tin-antimony oxide superfine nanometer powder after the deposition is dried; and fourthly, calcining the precursor powder in air, cleaning the powder with the distilled water, and obtaining the tin-antimony oxide superfine nanometer powder. The grain size of the tin-antimony oxide superfine nanometer powder prepared in the invention is 5.4 nm; and the powder has the advantages of superfine crystal grain, uniform grain size, good dispersion stability in the solvent, and the like, and is applicable to transparent conductive coating layers, shading coating layers, and electrostatic prevention, electromagnetic radiation prevention and dazzle prevention coating layers.

Description

technical field [0001] The invention relates to a preparation method of nano powder, in particular to a preparation method of tin antimony oxide ultrafine nano powder. Background technique [0002] As a transparent conductive oxide material, tin antimony oxide (ATO) material is not as conductive as indium tin oxide (ITO) material, but its price is much lower than the latter. It is used in transparent conductive electrodes, sunshade coatings and displays. "Three-defense" (anti-static, anti-glare, anti-electromagnetic radiation) coatings and other fields have high application value. Considering the economy and optical transparency of industrial-scale applications, nano-powders have been used as raw materials for ATO coatings, which not only requires a small amount of conductive powders under the same coating performance requirements, but also saves costs, and more importantly The most important thing is that the uniformity and transparency of the coating can be greatly improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01G15/00C03C17/23
Inventor 卢金山
Owner NANCHANG HANGKONG UNIVERSITY
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