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Method for preparing indium oxide for organic light emitting diode

A technology of light-emitting diodes and indium oxide, which is applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problems of easily polluted environment, a large amount of waste acid and waste alkali, etc., and achieves high purity and uniform particle size. , the effect of low impurity content

Active Publication Date: 2015-01-07
ZHUZHOU KENENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are: due to the use of acid and alkali as intermediate materials, impurities are easily introduced into the final indium oxide; a large amount of waste acid and waste alkali are produced during the production process, which is very easy to pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Add 1000 grams of refined indium with a purity of 99.995% and 1 gram of ammonium sulfate catalyst, then add 5 kg of pure water, raise the temperature to 270 degrees Celsius in the reaction kettle, and press 4 MPa to make the water in a critical state; stir for 30 minutes to obtain indium hydroxide, Indium oxide is obtained by calcining indium hydroxide in a calciner at 450°C.

example 2

[0028] Add 2000 grams of refined indium with a purity of 99.995%, add 2 grams of catalyst ammonium sulfate, and then add 10 kg of pure water, raise the temperature to 300 degrees Celsius in the reactor, and the pressure is 8 MPa, and stir for 30 minutes to obtain indium hydroxide. Calcination at 550 degrees Celsius Obtain indium oxide after middle calcining, all the other are with example 1.

example 3

[0030] Add 4000 grams of refined indium with a purity of 99.995% and 4 grams of catalyst ammonium sulfate, then add 20 kg of pure water, heat up to 370 degrees Celsius in the reaction kettle, press 20 MPa, and stir for 30 minutes to obtain indium hydroxide. Calcination at 650 degrees Celsius Obtain indium oxide after middle calcining, all the other are with example 1.

[0031] Origin of refined indium: the company produces it itself and refines it from crude indium.

[0032] Ammonium Sulfate Origin: Produced by Shanghai Sinopharm Group, super pure.

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PUM

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Abstract

The invention discloses a method for preparing indium oxide for an organic light emitting diode (OLED). The method for preparing indium oxide for the organic light emitting diode, disclosed by the invention, comprises the following steps of: A, adding pure indium, catalyst and pure water in the solid-to-liquid ratio of 1:0.001:5 by weight into a reaction kettle, heating at the temperature of 270-370 DEG C, and pressurizing at 4-20MPa, so that pure water is at a super-critical state; B, stirring for 30min, so that indium completely becomes indium hydroxide; and C, sintering indium hydroxide obtained in the step B at 450-650 DEG C to prepare indium oxide, wherein the purity of the pure indium is 99.995 percent, and the pure water has electric conductivity equal to 18.25 megohm / cm. The method is mainly used for preparing indium oxide for the OLED.

Description

technical field [0001] The invention relates to a method for producing indium oxide, in particular to a method for producing indium oxide for organic light-emitting diodes. Background technique [0002] OLED (Organic Light-Emitting Diode), also known as Organic Electroluminesence Display (OELD). It has the characteristics of light and thin, power saving and so on. OLED display technology is different from the traditional LCD display method. It does not need a backlight and has the characteristics of self-illumination. It uses a very thin organic material coating and glass substrate. When an electric current passes through, these organic materials will emit light. Moreover, the OLED display screen can be made lighter and thinner, has a wider viewing angle, and can significantly save power. It is a new type of product that is developing rapidly and has great development prospects. [0003] Materials used for OLED electrodes currently include indium oxide, tin oxide, antimony...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00
Inventor 赵科湘
Owner ZHUZHOU KENENG NEW MATERIAL CO LTD
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