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Method and device for preparing spherical VO2 nano powder by ultrasonic atomization method

An ultrasonic atomization, nano-powder technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of slow reaction and low comprehensive yield, and achieve good crystallinity and sufficient React, avoid the effect of sticking to the wall

Active Publication Date: 2021-01-19
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, this reaction is extremely slow, and the final concentration is often only 0.02mol / L, making the comprehensive yield of the process extremely low

Method used

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  • Method and device for preparing spherical VO2 nano powder by ultrasonic atomization method
  • Method and device for preparing spherical VO2 nano powder by ultrasonic atomization method
  • Method and device for preparing spherical VO2 nano powder by ultrasonic atomization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 4.55g of vanadium pentoxide, add deionized water to make the volume up to 1.00L, stir in a water bath at 80°C for 4 hours, then add ammonia water drop by drop until the vanadium pentoxide is completely dissolved, and re-volume the solution to 1.00 L and load figure 1 In the atomizing container 1 of the device shown. First, through the inert gas inlet 12, continue to feed argon for 30 minutes. After 30 minutes, continue to feed argon and open the first tube furnace 2 and the second tube furnace 4. The first tube furnace 2 rises to 100 ° C and the second tube furnace When the furnace 4 rises to 500°C, the ultrasonic atomizer 11 is turned on, and H is introduced into the buffer container 3 through the reducing gas inlet 31 at the same time. 2 gas. When the vanadium-containing solution in the atomization container 1 is sprayed, close the reducing gas inlet 31, close the first tube furnace 2 and the second tube furnace 4 to complete the heat preservation, and continu...

Embodiment 2

[0040] Weigh 10.50g of vanadium pentoxide, add deionized water to make it up to 1.00L, stir in a water bath at 90°C for 6 hours, then add ammonia water drop by drop until the vanadium pentoxide is completely dissolved, and re-set the volume of the solution to 1.00 L and load figure 1 In the atomizing container 1 of the device shown. First, argon is continuously fed through the inert gas inlet 12 for 30 minutes, and after 30 minutes, the argon is continued and the first tube furnace 2 and the second tube furnace 4 are turned on. The first tube furnace 2 rises to 150 ° C and the second tube furnace When the furnace 4 rises to 550°C, the ultrasonic atomizer 11 is turned on, and at the same time, NH is introduced into the buffer container 3 through the reducing gas inlet 31 3 gas. When the vanadium-containing solution in the atomization container 1 is sprayed, close the reducing gas inlet 31, close the first tube furnace 2 and the second tube furnace 4 to complete the heat prese...

Embodiment 3

[0042] Weigh 18.20g of vanadium pentoxide, add deionized water to make it up to 1.00L, stir in a water bath at 100°C for 8 hours, then add ammonia water drop by drop until the vanadium pentoxide is completely dissolved, and re-set the volume of the solution to 1.00 L and load figure 1 In the atomizing container 1 of the device shown. First, through the inert gas inlet 12, continue to feed argon for 30 minutes. After 30 minutes, continue to feed argon and open the first tube furnace 2 and the second tube furnace 4. The first tube furnace 2 rises to 200 ° C and the second tube furnace When the furnace 4 rises to 60°C, the ultrasonic atomizer 11 is turned on, and CO gas is introduced into the buffer container 3 through the reducing gas inlet 31 at the same time. When the vanadium-containing solution in the atomization container 1 is sprayed, close the reducing gas inlet 31, close the first tube furnace 2 and the second tube furnace 4 to complete the heat preservation, and contin...

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Abstract

The invention discloses a method and device for preparing spherical VO2 nano powder by an ultrasonic atomization method, relates to the field of preparation of inorganic functional materials, and aimsto solve the technical problem of providing a method and device capable of preparing vanadium dioxide powder. The method comprises the following steps: dissolving vanadium pentoxide in water to forma vanadium-containing solution with a certain concentration; atomizing the vanadium-containing solution, then fully drying in an inert gas atmosphere, reducing vanadium pentoxide by reducing gas undera heating condition, reacting to obtain vanadium dioxide powder, and collecting the powder. In order to promote dissolution of vanadium pentoxide, vanadium pentoxide is added into deionized water, heated and stirred, and then a co-solvent is added. After being atomized, the vanadium-containing solution firstly enters a first tubular furnace to be dried, then enters a buffer container, then entersa second tubular furnace to be subjected to a reduction reaction, and enters a collecting container after the reaction; wherein the buffer container is provided with a reducing gas inlet. The methodis suitable for preparing the vanadium dioxide powder with small granularity and high purity.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic functional materials, in particular to a preparation of spherical VO by ultrasonic atomization 2 Nanopowder method and device. Background technique [0002] Spray pyrolysis is a common method for preparing spherical nano-powders. It belongs to one of high-temperature pyrolysis. The biggest advantage is that spherical powder particles can be prepared, and nano-powders can be prepared continuously and uninterrupted. The principle of spray thermal decomposition is to make the liquid into small droplets through ultrasonic atomization, and pass through the high-temperature zone under the drive of the airflow, and dry and thermally decompose instantaneously to obtain the target product. The droplet size of ultrasonic atomization is usually in the submicron range. It can be considered that in the case of a certain droplet size, the greater the molecular weight of the vanadium-containing...

Claims

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Application Information

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IPC IPC(8): C01G31/02B82Y30/00B82Y40/00
CPCC01G31/02B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/32C01P2004/64
Inventor 刘波彭穗陈勇姚洁
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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