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Preparation method of indium tin oxide nano powder

An indium tin oxide and nano-powder technology is applied in chemical instruments and methods, gallium/indium/thallium compounds, inorganic chemistry, etc., to achieve the effect of reducing high temperature and high pressure, simple preparation process, and easy industrial application.

Inactive Publication Date: 2012-01-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report of ITO nanopowder prepared by solvothermal method using ethylenediamine and deionized water as solvents.

Method used

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  • Preparation method of indium tin oxide nano powder
  • Preparation method of indium tin oxide nano powder
  • Preparation method of indium tin oxide nano powder

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Weigh 0.1435g of tin chloride pentahydrate and 1.1732g of indium chloride tetrahydrate and dissolve them in 20ml of deionized water in a beaker, then add 20ml of ethylenediamine solution, and mix well. The mixed solution was transferred to a reaction kettle, reacted at 200° C. for 3 hours, and the reaction kettle was taken out to cool to room temperature to obtain an intermediate product. The intermediate product was centrifuged at 6000rpm for 20min, washed with deionized water until Cl-free - Washed twice with absolute ethanol, and the product was dried at 40°C for 24 hours to obtain an ITO precursor. The above-mentioned ITO precursor was put into a crucible and placed in a muffle furnace, and the temperature was raised from room temperature to 550 °C at a heating rate of 2 °C / min, kept for 1 h, and then cooled naturally to obtain ITO nanopowder. figure 1 For the X-ray diffraction pattern (XRD) of the ITO nano-powder prepared in this embodiment, it can be seen that t...

Embodiment 2

[0025] Weigh 0.1435g of tin chloride pentahydrate and 1.1732g of indium chloride tetrahydrate into a beaker and dissolve in 20ml of deionized water, then add 20ml of ethylenediamine solution and mix well. Transfer the mixed solution to a reaction kettle, react at 180°C for 5 hours, take out the reaction kettle and cool to room temperature to obtain an intermediate product. The intermediate product was centrifuged at 6500rpm for 15min, washed with deionized water until Cl-free - Washed once with absolute ethanol, and the product was dried at 50°C for 15 hours to obtain an ITO precursor. The above ITO precursor was put into a crucible and placed in a muffle furnace, and the temperature was raised from room temperature to 500°C at a heating rate of 4°C / min, kept for 1.5h, and then cooled naturally to obtain ITO nanopowder. XRD and EDS test results show that the nanocomposite material is ITO nanopowder material, and the grain size is 10.2nm calculated by Scherrer's formula. It c...

Embodiment 3

[0027] Weigh 0.2870g of tin chloride pentahydrate and 2.3464g of indium chloride tetrahydrate into a beaker and dissolve in 20ml of deionized water, then add 18ml of ethylenediamine solution and mix well. The mixed solution was transferred to a reaction kettle, reacted at 160° C. for 12 hours, and the reaction kettle was taken out to cool to room temperature to obtain an intermediate product. The intermediate product was centrifuged at 7000rpm for 10min, washed with deionized water until Cl-free - Washed three times with absolute ethanol, and dried the product at 60 °C for 10 h to obtain the ITO precursor. The above-mentioned ITO precursor was put into a crucible and placed in a muffle furnace, and the temperature was raised from room temperature to 450°C at a heating rate of 6°C / min, kept for 2h, and then cooled naturally to obtain ITO nanopowder. XRD and EDS test results show that the nanocomposite is ITO nanopowder material. The field emission scanning electron microscope...

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Abstract

The invention provides a preparation method of indium tin oxide nano powder, including that: indium chloride tetrahydrate and stannic chloride pentahydrate with the mol ratio of indium and stannum of 9-10:1 are dissolved by deionized water, ethidene diamine solution is added, and even mixing is carried out to obtain reaction solution; the reaction solution is placed into a kettle, reaction is carried out at 150-200 DEG C for 3-18 hours, and natural cooling to room temperature is carried out, so as to obtain intermediate product; the intermediate product is separated by centrifugation, washed by deionized water and absolute alcohol and dried at 40-70 DEG C for 6-24 hours, so as to obtain ITO precursor; the obtained ITO precursor is calcined and then heated to 400-550 DEG C from room temperature at heating rate of 2-8 DEG C per minute, heat preservation is carried out for 1-3 hours, and natural cooling to room temperature is carried out, thus obtaining ITO nano powder. The prepared ITO nano powder has high purity, small grain and uniform component, and synthesis technology and the required production equipment are simple, and industrialized production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of nano powders, in particular to a preparation method of indium tin oxide nano powders. Background technique [0002] With the development of liquid crystal display, the demand for indium tin oxide for transparent electrodes has increased sharply. At present, developed countries in the world use about half of indium to prepare ITO materials. As an n-type degenerate semiconductor, nano-ITO is transparent to visible light, can strongly reflect infrared light, has good electrical conductivity, good binding ability with the substrate and good chemical stability, and has attracted more and more attention. LCD, OLED), solar cells, sensors, functional glass, etc. are increasingly widely used. [0003] There are many preparation methods of ITO nanopowder, which can be divided into physical method, chemical method and physicochemical method. According to the original state of the substance, it can be divided into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00
Inventor 李耀刚朱冰洁王宏志张青红朱美芳
Owner DONGHUA UNIV
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