Preparation method for cadmium telluride

A technology of cadmium telluride and tellurium powder, which is applied in chemical instruments and methods, binary selenium/tellurium compounds, metal selenide/telluride, etc., can solve the problems of insufficient reaction, uneven temperature and high cost, and achieve the synthesis Sufficient, improve the purity, uniform heating effect

Active Publication Date: 2013-12-04
XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts hot rod heating method, the temperature is not uniform enough, and the reaction is not sufficient
And the vacuum sealing technology is adopted, and the cost is relatively high

Method used

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  • Preparation method for cadmium telluride
  • Preparation method for cadmium telluride

Examples

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preparation example Construction

[0012] First, the method for preparing cadmium telluride according to the present invention will be described.

[0013] The preparation method of cadmium telluride according to the present invention includes a primary synthesis step and a secondary synthesis step.

[0014] Wherein, one synthesis step includes: mixing 5N tellurium powder and 5N cadmium powder in proportion to obtain a mixture; loading the mixture into the first graphite boat; placing the first graphite boat containing the mixture into the first In the quartz tube; the first quartz tube with the first graphite boat will be placed in the first synthesis furnace; feed the first inert gas to evacuate the air in the first quartz tube; the air in the first quartz tube is covered by the first inert gas After emptying, the first synthesis furnace adopts the first multi-stage heating and heat preservation method to make the mixed materials in the first graphite boat carry out the synthesis reaction, and in the first mul...

Embodiment 1

[0031] A: One synthesis step

[0032] (a1) 5N tellurium powder and 5N cadmium powder particle size is 0.5 ~ 2mm, according to the molar ratio of 1:1 uniformly mixed, to obtain the mixture;

[0033] (a2) The mixed material is loaded into the first graphite boat, and the first graphite boat is a high-temperature water-quenched graphite boat;

[0034] (a3) placing the first graphite boat with the mixed material in the first quartz tube;

[0035] (a4) placing the first quartz tube with the first graphite boat in the first synthesis furnace;

[0036] (a5) feed the first inert gas to evacuate the air in the first quartz tube, and the first inert gas is nitrogen;

[0037] (a6) After the air in the first quartz tube is evacuated by the first inert gas, the first synthesis furnace adopts the first multi-stage heating and heat preservation method to make the mixed materials in the first graphite boat carry out the synthesis reaction, wherein the first multi-stage temperature rise The h...

Embodiment 2

[0053] A: One synthesis step

[0054] (a1) 5N tellurium powder and 5N cadmium powder have a particle size of 2 to 3.5 mm and are uniformly mixed in a molar ratio of 1:1 to obtain a mixture;

[0055] (a2) The mixed material is loaded into the first graphite boat, and the first graphite boat is a high-temperature water-quenched graphite boat;

[0056] (a3) placing the first graphite boat with the mixed material in the first quartz tube;

[0057] (a4) placing the first quartz tube with the first graphite boat in the first synthesis furnace;

[0058] (a5) feed the first inert gas to evacuate the air in the first quartz tube, and the first inert gas is nitrogen;

[0059] (a6) After the air in the first quartz tube is evacuated by the first inert gas, the first synthesis furnace adopts the first multi-stage heating and heat preservation method to make the mixed materials in the first graphite boat carry out the synthesis reaction, wherein the first multi-stage temperature rise Th...

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Abstract

The invention provides a preparation method for cadmium telluride. The method comprises a first synthesis and a second synthesis. The first synthesis comprises steps: tellurium and cadmium are mixed and placed in a first graphite boat; the first graphite boat is then placed in a first quartz tube; the first quartz tube is then placed in a first synthetic furnace; a first inert gas is introduced to empty air in the first quartz tube; a first multi-section heating and heat preservation process is carried out, the first inert gas is introduced in the front section and a first reducing gas is introduced in the back section; after the synthetic reaction, the first synthetic furnace is cooled to room temperature in sections, the first reducing gas is introduced in the front section and the first inert gas is introduced in the back section; first synthetics are obtained. The second synthesis comprises steps: the first synthetics are placed in a second graphite boat; the second graphite boat is then placed in a second quartz tube; the second quartz tube is then placed in a second synthetic furnace; a second inert gas is introduced to empty air in second first quartz tube; a second multi-section heating and heat preservation process is carried out, a second inert gas is introduced in the front section and a second reducing gas is introduced in the back section; after the synthetic reaction, heating is stopped, the second synthetic furnace is cooled to room temperature in sections, the second reducing gas is introduced in the front section and the second inert gas is introduced in the back section; second synthetics are obtained.

Description

technical field [0001] The invention relates to a preparation method of synthetic materials, in particular to a preparation method of cadmium telluride. Background technique [0002] Currently, there are many methods for the preparation of cadmium telluride. One of the methods is to insert a hot rod into the mixed powder of tellurium and cadmium and heat it to 500 ° C to produce it. This method adopts the hot rod heating mode, the temperature is not uniform enough, and the reaction is not sufficient enough. Moreover, the vacuum sealing technology is adopted, and the cost is relatively high. Contents of the invention [0003] Aiming at the deficiencies in the background technology, the purpose of the present invention is to provide a method for preparing cadmium telluride, which can make the synthesis of cadmium telluride evenly heated and fully synthesized. [0004] The purpose of the present invention is to provide a preparation method of cadmium telluride, which can r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04
CPCC01B19/007C01P2004/62C01B19/04C01G11/00C01P2004/61
Inventor 朱世会朱世明朱刘刘留
Owner XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
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