New method for quick preparation of high-purity cadmium telluride powder

A technology of cadmium telluride and a new method, which is applied in the field of new energy photoelectric material preparation, can solve the problems that restrict the batch preparation and commercial application of cadmium telluride, high equipment dependence, long synthesis cycle, etc., and achieve high efficiency, energy saving and temperature rise The effect of speed, avoidance of process flow, and fast response

Inactive Publication Date: 2015-08-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods for preparing cadmium telluride powder all have shortcomings such as high dependence on equipment, long synthesis cycle, complicated operation, and high preparation cost. These factors will seriously restrict the batch preparation and commercial application of cadmium telluride

Method used

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  • New method for quick preparation of high-purity cadmium telluride powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A new method for rapidly preparing high-purity cadmium telluride powder, comprising the following steps:

[0026] 1) Mix 4N cadmium powder and 4N tellurium powder at a molar ratio of 1:1, the total mass of the raw materials is 5g, and then grind and mix the raw material powders evenly to obtain the mixed raw materials;

[0027] 2) cold pressing the mixed raw material obtained in step 1) into a cylindrical block body with a diameter of 10mm, wherein the pressing process is to hold the pressure at 3MPa for 5min;

[0028] 3) The bulk green body obtained in step 2) is ignited at one end to initiate a high-temperature self-propagating synthesis reaction. After the reaction is completed, it is naturally cooled and ground to obtain high-purity cadmium telluride powder.

[0029] figure 1 For the X-ray diffraction pattern (XRD) of the cadmium telluride powder that the present embodiment makes, show in the figure: the product powder X-ray characteristic diffraction peak that obt...

Embodiment 2

[0032] A new method for rapidly preparing high-purity cadmium telluride powder materials, which comprises the following steps:

[0033] 1) Mix 5N cadmium powder and 5N tellurium powder at a molar ratio of 1:1, the total mass of the raw materials is 10g, and then grind and mix the raw material powders evenly;

[0034] 2) Press the homogeneously mixed powder obtained in step 1) into a cylindrical block body with a diameter of 12 mm, wherein the pressing process is 4 MPa for 8 minutes;

[0035] 3) The bulk green body obtained in step 2) is ignited at one end to initiate a high-temperature self-propagating synthesis reaction. After the reaction is completed, it is naturally cooled and ground to obtain high-purity cadmium telluride powder.

Embodiment 3

[0037] A new method for rapidly preparing high-purity cadmium telluride powder materials, which comprises the following steps:

[0038] 1) Mix 5N cadmium powder and 5N tellurium powder at a molar ratio of 1:1, the total mass of the raw materials is 20g, and then grind and mix the raw material powders evenly;

[0039] 2) Press the homogeneously mixed powder obtained in step 1) into a cylindrical block body with a diameter of 15 mm, wherein the pressing process is 5 MPa and holding pressure for 2 min;

[0040] 3) The bulk green body obtained in step 2) is ignited at one end to initiate a high-temperature self-propagating synthesis reaction. After the reaction is completed, it is naturally cooled and ground to obtain high-purity cadmium telluride powder.

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Abstract

The invention discloses a new method for quick preparation of high-purity cadmium telluride powder. The method comprises the steps of: firstly, mixing cadmium powder and tellurium powder at a mole ratio of 1: 1 and then uniformly grinding and mixing; cold-pressing the uniformly mixed powder into a block-shaped blank body; triggering a self-propagating high temperature synthesis reaction on the obtained block-shaped blank body; at the end of the reaction, naturally cooling and grinding to be the single-phase high-purity cadmium telluride powder. The new method provided by the invention is quick in reaction speed, simple in process, low in cost, low in equipment dependency, efficiency and energy-efficient; the whole preparation process can be finished within 10 min, synthesis efficiency of the cadmium telluride powder can be greatly improved and batch production is easily realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy photoelectric materials, and in particular relates to a new method for rapidly preparing high-purity cadmium telluride powder. Background technique [0002] Cadmium telluride is a binary compound synthesized from tellurium and cadmium. It is a typical wide bandgap compound semiconductor, and its bandgap is generally 1.45eV. It is an ideal photoelectric conversion material. At present, cadmium telluride is mainly used in infrared optical window materials, photoelectric modulators and solar thin film batteries. [0003] The key core material of solar cadmium telluride thin film battery is polycrystalline cadmium telluride powder. At present, there are two main methods for synthesizing cadmium telluride powder: chemical method and physical method. Among them, the physical method mainly synthesizes cadmium telluride by high-temperature reaction of single mass or powder of tellurium...

Claims

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Application Information

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IPC IPC(8): C01B19/04
Inventor 唐新峰梁涛谭晓鸣马世林刘欢谢鸿耀苏贤礼鄢永高
Owner WUHAN UNIV OF TECH
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