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Process for rapidly synthesizing high-purity amorphous boron powder

An amorphous boron powder, high-purity technology, applied in the direction of boron, boron/boride, etc., can solve the problems of unsatisfactory use requirements and low content, and achieve the effect of low energy consumption, high content, and simple process operation

Inactive Publication Date: 2018-05-25
王婉婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis methods of amorphous boron powder include magnesia thermal self-propagation method, thermite self-propagation method, molten salt electrolysis method, boron halide reduction method, etc. Among them, the industrialized synthesis method is magnesia thermal self-propagation method. The purity of the powder is about 90%, the highest is not more than 93%, and the content is relatively low, which cannot meet the use requirements of some fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 150g of magnesium powder and 200g of diboron trioxide are put into the mixer and mixed evenly. The mixed material is put into a high-temperature furnace, the temperature in the furnace is 600°C, the material undergoes a self-propagating reaction, and the material is cooled to room temperature after the reaction. 350 g of the obtained material was put into a high-temperature furnace protected by argon at 800° C. for heat treatment for 2 hours to obtain 345 g of the processed material. Put the material into a reactor filled with 3450g of 20% hydrochloric acid solution (mass ratio of material: hydrochloric acid solution = 1:10), heat to 80°C for washing, and filter after washing for 5 hours. To obtain 86g of solid material, add 2580g of water at a ratio of filter cake: water = 1:30, wash in a water washing tank at 50°C for 10 minutes, and then filter. After repeated washing with water 4 times, the filter cake was dried in a 90° C. vacuum oven for 3 hours to obtain 69 g of...

Embodiment 2

[0018] 150g of magnesium powder and 200g of diboron trioxide are put into the mixer and mixed evenly. The mixed material is put into a high-temperature furnace, the temperature in the furnace is 700°C, the material undergoes a self-propagating reaction, and the material is cooled to room temperature after the reaction. 348 g of the obtained material was put into a high-temperature furnace at 700° C. for heat treatment for 3 hours to obtain 346 g of the processed material. Put the material into a reactor filled with 4152g of 20% concentration hydrochloric acid solution (mass ratio of material: hydrochloric acid solution = 1:12), heat to 100°C for washing, wash for 4 hours and then filter. To obtain 81g of solid material, put in 2430g of water at a ratio of filter cake: water = 1:30, wash in a water washing tank at 90°C for 10 minutes, and then filter. After repeated washing with water 3 times, the filter cake was dried in a vacuum oven at 90° C. for 3 hours to obtain 62 g of a...

Embodiment 3

[0020] Put 150g of magnesium powder and 600g of diboron trioxide into the mixer and mix them evenly. The mixed material is put into a high-temperature furnace, the temperature in the furnace is 700°C, the material undergoes a self-propagating reaction, and the material is cooled to room temperature after the reaction. 750 g of the obtained material was put into a high-temperature furnace protected by argon at 900° C. for heat treatment for 3 hours to obtain 750 g of the processed material. Put the material into a reactor filled with 6000g of 15% hydrochloric acid solution (mass ratio of material: hydrochloric acid solution = 1:8), heat to 90°C for washing, and filter after washing for 2 hours. To obtain 80g of solid material, put in 2400g of water at a ratio of filter cake: water = 1:30, wash in a water washing tank at 90°C for 10 minutes, and then filter. After repeated washing with water 4 times, the filter cake was put into a 100° C. blast drying oven to dry for 3 hours to...

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Abstract

The invention discloses a process for rapidly synthesizing high-purity amorphous boron powder and belongs to the field of inorganic chemical synthesis. The amorphous boron powder product with purity being 95% or higher is prepared from magnesium powder and boron trioxide as raw materials through steps of high-temperature self-propagating reaction, heat treatment, acid washing, water washing and drying, and the content of the amorphous boron powder is higher as compared with boron powder obtained with the traditional self-propagating method. The purification process is simple to operate, complicated operation for intermediate synthesis of level-90 boron powder is omitted as compared with other 95 boron powder processes, energy consumption is low, and the process is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of inorganic chemical synthesis, in particular to a process for quickly synthesizing high-purity amorphous boron powder. Background technique [0002] Amorphous boron powder is an inorganic material that exists in an atomic amorphous state. It can be used in nuclear power, military industry, chemical industry and other fields, and has a good application prospect. At present, the synthesis methods of amorphous boron powder include magnesia thermal self-propagation method, thermite self-propagation method, molten salt electrolysis method, boron halide reduction method, etc. Among them, the industrialized synthesis method is magnesia thermal self-propagation method. The purity of the powder is about 90%, the highest is not more than 93%, and the content is relatively low, which cannot meet the use requirements of some fields. Therefore, developing a synthetic method of high-purity amorphous boron powder that can be indu...

Claims

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Application Information

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IPC IPC(8): C01B35/02
CPCC01B35/023C01P2006/80
Inventor 王婉婷黄芬
Owner 王婉婷
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