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Preparing method of nano beryllium powder

A nano and organic beryllium technology is applied in the field of preparation of nano beryllium powder, which can solve the problems of serious contact pollution of grinding equipment, difficulty in reducing the particle size of beryllium powder, complicated process equipment, etc., and achieves reduction of contact pollution, good sphericity, The effect of simple process

Inactive Publication Date: 2016-07-06
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Beryllium has three defects that seriously restrict its development: brittle, expensive, toxic
The particle size of beryllium powder obtained by mechanical grinding is difficult to reduce, the process equipment is complicated, the cost is high, repeated grinding takes a long time, the number of times is high, the powder outlet temperature is high, and the degree of oxidation is high
The grinding equipment is seriously polluted and the impurities are introduced

Method used

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  • Preparing method of nano beryllium powder

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] figure 1 It is a structural schematic diagram of the preparation device of the nano beryllium powder of the present invention.

[0016] The beryllium powder preparation process is carried out in a glove box. The gas in the glove box is high-purity argon (99.999%), the oxygen content is ≤10ppm, and the water content is ≤1ppm. The exhaust gas produced by the experiment is discharged to the beryllium laboratory filter tower. When entering the laboratory, wear a protective lab coat, a protective half mask, and latex gloves.

Embodiment 1

[0018] 1. Solvent purification

[0019] In this experiment, n-dodecane (Aladdin reagent, purity 99%, CAS: 112-53-8, boiling point 217°C) was used as the pyrolysis solvent. Before the solvolysis experiment, n-dodecane was purified by distillation to remove non-volatile impurities. Distillation under reduced pressure, the solvent temperature is about 128°C, the steam temperature is about 80°C, the distillation temperature is affected by the vacuum in the flask, the stirring speed is 1000 rpm, and the solvent after distillation is analyzed by ICP-MS. The test results show that , with no detectable metal impurities.

[0020] 2. Electronic thermometer calibration

[0021] The purified n-dodecane was added to the three-neck reaction flask 6, and the electronic thermometer was calibrated by the constant temperature (217°C) when n-dodecane boiled.

[0022] 3. Constant temperature of solvent

[0023] The temperature of the n-dodecane solvent was lowered to 203°C and maintained for ...

Embodiment 2

[0033] A micro-droplet controller is used to control the di-tert-butyl beryllium raw material to spray micro-droplets of picoliters to carry out pyrolysis reaction. Others are the same as in Example 1. Compared with Example 1, the particle size of the beryllium powder obtained in this experiment is smaller, but because the distribution speed of the organic beryllium liquid is too slow, the preparation rate of the beryllium powder is low.

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Abstract

The invention provides a preparation method of nano beryllium powder. The preparation method comprises the steps of: (a) heating the mineral oil solvent to a constant temperature; (b) distributing the organic beryllium ether compound by using a micro-droplet generator, and transporting the organic beryllium ether compound from the liquid storage pipe to the distribution head through a pipeline , forming micro-droplets and spraying into the heated mineral oil solvent; (c) organic beryllium ether compounds are decomposed by heating in mineral oil solvents to generate BeH 2 , the by-product isobutene and ether are discharged; (d) BeH 2 Dehydrogenation by overheating to generate beryllium; (e) distillation and separation of mineral oil solvent and drying to obtain nano-beryllium powder.

Description

technical field [0001] The present invention relates to a preparation method of nano-beryllium powder, more specifically, the present invention relates to a method for preparing nano-beryllium powder by pyrolyzing organic beryllium ether compound micro-droplets into a constant temperature mineral oil solvent by using a micro-droplet generator Methods. Background technique [0002] Beryllium is a rare light metal, which has some special properties and has achieved remarkable results in the application of atomic energy reactors. Its applications in inertial navigation, optical systems, missiles, satellites, spacecraft and aircraft have partially replaced aluminum , magnesium, titanium. Especially in the production of lightweight structural materials, beryllium has occupied a very important position. Beryllium has three defects that seriously restrict its development: brittle, expensive, and poisonous. Beryllium ingots contain a large number of pores, and the microstructure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30
CPCB22F9/30
Inventor 张吉强陈龙罗江山金雷何玉丹罗炳池李恺李文琦谭秀兰李喜波康晓丽徐习斌
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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