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Method for preparing ITO powder by spray thermolysis method

A pyrolysis and powder technology, applied in tin oxide and other directions, can solve the problems of high heat, slow heating rate and low thermal efficiency in the experimental working environment, and achieve the effect of good product uniformity, small size distribution and good dispersion.

Inactive Publication Date: 2017-01-25
SHAANXI SHENGMAI PETROLEUM
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Problems solved by technology

At present, the pyrolysis part of the spray pyrolysis method is mainly based on traditional heating, but traditional heating has some disadvantages such as low thermal efficiency, slow heating rate, high energy consumption and high heat in the experimental working environment.

Method used

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Experimental program
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Embodiment Construction

[0015] The method for preparing ITO powder by spray pyrolysis method adopts the following method:

[0016] According to the final ITO product m(In 2 o 3 ): m(SnO 2 )= 9:1 InCl required for conversion ratio calculation 3 4H 2 O and SnCl 2 2H 2 O, weigh indium chloride and stannous chloride and dissolve them in deionized water, so that the two metal salts can be mixed evenly at the molecular level to prepare a precursor solution, and a small amount of 1:1 hydrochloric acid is added dropwise during the process to prevent hydrolysis;

[0017] Add the precursor solution into the ultrasonic nebulizer to make fog; use air as the carrier gas, pass the atomized liquid droplets into the microwave tube heating furnace, and the carrier gas sends the fog droplets through the catheter to the microwave heating chamber for heating, and the fogging process is carried out. Droplet evaporation, cracking, drying, crystallization, nucleation, and finally thermal decomposition to generate IT...

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Abstract

The invention relates to the technical field of a functional material, in particular to a method for preparing ITO powder by a spray thermolysis method. Required InCl3.4H2O and SnCl2.2H2O are calculated according to the conversion mixture ratio of m(In2O3):m(SnO2) being 9:1 in the final ITO product; indium chloride and stannous chloride are weighed and are dissolved into deionized water, so that the two kinds of metal salts can be uniformly mixed in the molecular range to be prepared into a precursor solution; in the process, little hydrochloric acid at a proportion of 1:1 is dripped for preventing hydrolysis; the precursor solution is added into an ultrasonic sprayer for spray making; the air is used as carrier gas; atomized liquid drips are introduced into a microwave wave tubular heating furnace; the carrier gas feeds spray drips into a microwave heating cavity to be heated through a catheter; the spray drips are subjected to evaporation, pyrolysis, drying, crystallization and nucleation; finally, thermolysis is performed to produce the ITO powder. The method provided by the invention has the advantages that the ultrasonic wave spraying is used for being combined with the microwave pyrolysis one-step method; the prepared ITO powder has good dispersibility, high purity and small and uniform dimension distribution.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a method for preparing ITO powder by a spray pyrolysis method. Background technique [0002] At present, ITO materials mainly include three kinds of products: ITO powder, ITO target material and ITO thin film. It has a wide range of applications in various fields such as display screens, coatings, rubber, glass, ceramics, plastics, military, photocatalysts, cell tracking agents, solar cells, gas sensors, short-wavelength devices and capacitors, so IT0 powder Preparation gets a lot of attention. [0003] At present, the methods for preparing ITO powder mainly include hydrothermal synthesis method, sol-gel method, chemical co-precipitation method and spray-combustion method. These preparation methods have disadvantages such as relatively complex technical process, high equipment requirements, difficult control of purity, and inconspicuous environmental protection, en...

Claims

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Application Information

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IPC IPC(8): C01G19/02
CPCC01G19/02
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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