Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of high-purity cadmium selenide

A cadmium selenide, high-purity technology, applied in the direction of binary selenium/tellurium compound, metal selenide/telluride, etc., to achieve the effect of high product yield and short process flow

Active Publication Date: 2018-05-11
清远先导材料有限公司
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few reports on the synthesis method of cadmium selenide at home and abroad.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-purity cadmium selenide
  • Preparation method of high-purity cadmium selenide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0009] The preparation method of high-purity cadmium selenide according to the present application includes steps: S1, uniformly mix selenium grains and cadmium grains in a certain proportion, place them in a high-temperature and high-pressure furnace, raise the temperature to 800°C-1200°C, and increase the pressure to 10 standard Atmospheric pressure and above, heat preservation and pressure for reaction until the end of the reaction, after cooling down and pressure reduction, the primary material of cadmium selenide is obtained; S2, the primary material of cadmium selenide is crushed and screened, then placed in an atmosphere furnace, and the temperature is raised to 700 °C ~900°C, hydrogenation and impurity removal by passing through hydrogen, and high-purity cadmium selenide can be obtained after cooling down and taking out the furnace.

[0010] In the method of the present application, cadmium grains and selenium grains are used as raw materials, after high temperature and...

Embodiment 1

[0028] Mix 412.6g of selenium particles with a particle size of less than 2mm and a purity of 5N and 587.4g of cadmium particles with a particle size of less than 2mm and a purity of 5N (wherein the molar ratio of the selenium particles to the cadmium particles is 1:1) and place In the graphite boat, place the graphite boat in a high-temperature and high-pressure furnace, raise the temperature to 950°C at a rate of 15°C / min, and increase the pressure to 10 standard atmospheres at the same time, keep the heat for 3 hours, stop heating and lower the pressure after the end, After the temperature drops below 100°C and the pressure drops to normal pressure, it is released from the furnace to obtain the primary material of cadmium selenide.

[0029] Put the primary material of cadmium selenide into a ball mill tank after being crushed, and then add 3 kg of zirconium balls for ball milling. The ball milling time is 2 hours. After the ball milling is completed, sieve to obtain the prod...

Embodiment 2

[0032] Mix 825.2g of selenium particles with a particle size of less than 2mm and a purity of 5N and 1163.05g of cadmium particles with a particle size of less than 2mm and a purity of 5N (wherein the molar ratio of selenium particles to cadmium particles is 1:0.99) and place them in graphite In the boat, place the graphite boat in a high-temperature and high-pressure furnace, raise the temperature to 950°C at a rate of 10°C / min, and increase the pressure to 50 standard atmospheres at the same time. When the temperature is lower than 100°C, the pressure is lowered to normal pressure, and then released from the furnace to obtain the primary material of cadmium selenide.

[0033] Put the primary material of cadmium selenide into a ball mill tank after being crushed, and then add 5 kg of zirconium balls for ball milling. The ball milling time is 2 hours. After the ball milling is completed, sieve to obtain the product with the required particle size. Then put the product in the g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of high-purity cadmium selenide. The preparation method comprises steps as follows: S1, selenium particles and cadmium particles are uniformly mixed in certain proportion, a mixture is put in a high-temperature and high-pressure furnace, heated to 800-1200 DEG C, boosted to 10 standard atmospheric pressure or higher and subjected to a reaction under thecondition of thermal insulation and pressure maintaining until the reaction is ended, the mixture is discharged out of the furnace after cooling and pressure reduction, and a primary cadmium selenidematerial is obtained; S2, the obtained primary cadmium selenide material is broken, screened, placed in an atmosphere furnace and heated to 700-900 DEG C, hydrogen is introduced for hydrogenated impurity removal, and after the material is cooled and discharged out of the furnace, high-purity cadmium selenide is obtained. According to the preparation method, the selenium particles and the cadmium particles are taken as raw materials and subjected to the high-temperature and high-pressure reaction and the hydrogenated impurity removal, and high-purity cadmium selenide is obtained; the technological process of the preparation method is short, the product yield is high, part of unqualified products can be taken as the raw materials for recycling, and the preparation method is suitable for massproduction.

Description

technical field [0001] The present application relates to the field of semiconductor materials, in particular to a preparation method of high-purity cadmium selenide. Background technique [0002] Cadmium selenide (CdSe) is a compound N-type semiconductor material with an energy gap of about 1.74eV, which is within the ideal solar cell energy gap range and has a good photoelectric conversion efficiency. With the rapid development of the thin film industry, thin film science and technology and thin film materials have become research hotspots in the field of materials science. As an N-type thin-film solar material, cadmium selenide can form a P-N junction with cadmium telluride. Studying its synthesis method is beneficial to the development of thin film solar materials. At the same time, cadmium selenide compounds can also be used to make infrared modulators, infrared detectors, etc. [0003] At present, there are few reports about the synthesis method of cadmium selenide ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04
CPCC01B19/007C01P2006/80
Inventor 李德官朱刘范文涛胡智向邹林平
Owner 清远先导材料有限公司