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Hydrogenation method for high-pure cadmium

A high-purity and hydrogen technology, which is applied in the field of high-purity cadmium preparation, can solve problems such as affecting the photoelectric properties of photosensitive materials of photovoltaic materials, and achieve the effects of being conducive to environmental protection, good effect and safe production.

Inactive Publication Date: 2008-02-20
四川鑫龙碲业科技开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This harmful impurity directly affects its photoelectric performance as a photovoltaic material, photoconductive material and photosensitive material, and it is also a problem that has been wanted to solve for a long time but has not found a good solution.

Method used

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  • Hydrogenation method for high-pure cadmium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 1 kg of 5N cadmium into the graphite boat 5, then put the graphite boat with 5N cadmium into the quartz tube 1, one end of the quartz tube is provided with a hydrogen gas inlet, the other end is provided with a hydrogen gas outlet, and the quartz tube is put into the heating furnace 2 Inside, the heating furnace is provided with an insulating layer 3, a heating wire 4, a graphite boat 5 and a quartz tube 1. The heating furnace is supported by a support 6. In the above-mentioned device, 4N hydrogen gas is introduced from the hydrogen gas inlet with a flow rate of 150ml / min, and the heating furnace is turned on. Heating system, when the temperature of the heating furnace rises to 370°C, the cadmium is melted and held for 2.5 hours, then the furnace is stopped to cool down and the material is discharged to obtain 0.95 kg of 5N cadmium with a yield of 95%.

Embodiment 2

[0016] Put 1.2 kg of 5N cadmium into the graphite boat 5, then put the graphite boat with 5N cadmium into the quartz tube 1, one end of the quartz tube is provided with a hydrogen gas inlet, and the other end is provided with a hydrogen gas outlet, and the quartz tube is put into the heating furnace 2 Inside, the heating furnace is provided with an insulating layer 3, a heating wire 4, a graphite boat 5 and a quartz tube 1. The heating furnace is supported by a support 6. In the above-mentioned device, 4N hydrogen gas is introduced from the hydrogen gas inlet with a flow rate of 200ml / min, and the heating furnace is turned on. Heating system, when the temperature of the heating furnace rises to 400°C, the cadmium is melted and kept for 2.5 hours, then the furnace is stopped to cool down and the material is discharged to obtain 1.15 kg of 5N cadmium with a yield of 99%.

Embodiment 3

[0018] Put 1.5 kg of 5N cadmium into the graphite boat 5, then put the graphite boat with 5N cadmium into the quartz tube 1, one end of the quartz tube is provided with a hydrogen gas inlet, the other end is provided with a hydrogen gas outlet, and the quartz tube is put into the heating furnace 2 Inside, the heating furnace is provided with an insulating layer 3, a heating wire 4, a graphite boat 5 and a quartz tube 1. The heating furnace is supported by a support 6. In the above-mentioned device, 4N hydrogen gas is introduced from the hydrogen gas inlet with a flow rate of 300ml / min, and the heating furnace is turned on. Heating system, when the temperature of the heating furnace rises to 420°C, the cadmium is melted and held for 1.8 hours, then the furnace is stopped to cool down and the material is discharged to obtain 1.4 kg of 5N cadmium with a yield of 98%.

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Abstract

The invention relates to a hydrogenation method of high purity cadmium. The invention is characterized in that load 1 to 1.5 weight ratio of five Nickel cadmium into a graphite boat(5); put the graphite boat with 5 Nickel cadmium into a quartz tube(1); one end of the quartz tube is provided with a hydrogen inlet and the other end is provided with a hydrogen outlet; the quartz tube is arranged inside a heating furnace(2); the heating furnace is internally provided with a heat preservation layer(3), a heating Wire(4), the graphite boat(5) and the quartz tube(1); the heating furnace is supported by a bracket(6); the 4 Nickel hydrogen is filled into the device through the hydrogen inlet with a flux of 150 to 300 milliliter per minute; open the heating system of the heating furnace until the temperature of the heating furnace is heated to 370 to 420 DEG C and the cadmium melting reacts for 1.8 to 2.5 hours, then close the furnace and decrease the temperature for material discharging; and then gain 0.95 to 14 5 weight ratio of 5 Nickel cadmium, with a yield of 95 to 99 percent.

Description

technical field [0001] The invention relates to a method for hydrogenating high-purity cadmium, which belongs to the field of high-purity cadmium preparation. Background technique [0002] High-purity cadmium is mainly used in the fields of infrared detection, solar cells and photoconductive materials. With the rapid development of photovoltaic industry and photoconductive material industry worldwide, the demand for high-purity cadmium in domestic and foreign markets is increasing rapidly. However, the high content of harmful impurities such as O, Cl, F, Br, and I in high-purity cadmium is a common problem in high-purity cadmium. This harmful impurity directly affects its photoelectric properties as photovoltaic materials, photoconductive materials and photosensitive materials, and it is also a problem that has been wanted to solve for a long time but has not found a good solution. Contents of the invention [0003] The purpose of the present invention is to provide a hi...

Claims

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Application Information

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IPC IPC(8): C22B17/06C22B5/12
Inventor 侯仁义
Owner 四川鑫龙碲业科技开发有限责任公司