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A preparation device for amorphous boron powder and method for preparing amorphous boron powder

A technology for the preparation of amorphous boron powder and equipment, which is applied in the direction of boron/boride, boron, etc., can solve the problems of low yield of boron powder and increase in the amount of chemical sewage, so as to improve the purity, reduce the reaction between boron powder and impurities, The effect of improving combustion performance

Active Publication Date: 2018-12-07
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

95%-97% of boron particles can be obtained through chemical refining, and amorphous boron powder with a particle size of about 1 μm can be obtained after ball milling; more treatment steps in this production method increase the amount of chemical sewage discharged, and boron powder The yield is not high, and only about 5-7kg of amorphous boron powder can be obtained from 100kg of raw materials

Method used

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  • A preparation device for amorphous boron powder and method for preparing amorphous boron powder
  • A preparation device for amorphous boron powder and method for preparing amorphous boron powder
  • A preparation device for amorphous boron powder and method for preparing amorphous boron powder

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Embodiment 1

[0056] Embodiment 1: A kind of amorphous boron powder preparation device

[0057] A preparation device for amorphous boron powder, as attached figure 1 As shown, it includes: stainless steel tank 1, reactor 2, cooling pipe 3, rubber sealing ring 4, upper end cover 5, copper ignition electrode 6, inflation valve 7, deflation valve 8, air guide pipe 9, metal sintered mesh 10, Tungsten wire 11 and electric resistance furnace 12, interconnection relationship and function are as follows:

[0058] The reactor 2 is a crucible, and the material of the crucible is one selected from stainless steel, tungsten, molybdenum, boron nitride or silicon nitride. The crucible is used to hold the reaction raw materials; the bottom of the crucible is provided with a metal sintered mesh 10, and the reaction raw materials are stacked on Metal sintering mesh 10 to prevent the reactants from sintering at the bottom of the crucible; the stainless steel tank body 1 and the upper end cover 5 form a seal...

Embodiment 2

[0060] Embodiment 2: the method for preparing amorphous boron powder

[0061] Use as attached figure 1 The preparation device for amorphous boron powder shown, according to the implementation steps described in the preparation method part of the invention, boron oxide, magnesium powder, sodium chloride, and potassium perchlorate are mixed according to the mass ratio of 1.2:1:1:0.05, and the electric resistance furnace Heat up to 350°C and ignite to trigger a self-propagating reaction. The mass ratio of solid to liquid for the first wash is 1:3, heated to 50°C, and stirred for 2 hours; the mass ratio of solid to liquid for the second wash is 1:10, heated to 50°C, and stirred for 1 hour; pickling The temperature is 50°C; for one pickling, add hydrochloric acid with a concentration of 2mol / L according to the solid-liquid mass ratio of 1:3, stir for 2 hours, add deionized water with the same quality as dilute hydrochloric acid, and continue stirring for 1 hour at 50°C; According ...

Embodiment 3

[0062] Embodiment 3: the method for preparing amorphous boron powder

[0063] Use as attached figure 1The shown amorphous boron powder preparation device, according to the implementation steps described in the preparation method part of the invention, boron oxide, magnesium powder, potassium chloride, and magnesium perchlorate are mixed according to the mass ratio of 1.5:1:1:0.05, The resistance furnace is heated to 260°C and then ignited to initiate a self-propagating reaction. The mass ratio of solid to liquid for the first wash is 1:3, heated to 80°C, and stirred for 2 hours; the mass ratio of solid to liquid for the second wash is 1:6, heated to 80°C, and stirred for 1 hour; The pickling temperature is 60°C; for one pickling, add hydrochloric acid with a concentration of 3mol / L according to the solid-liquid mass ratio of 1:4, stir for 2 hours, then add deionized water with the same quality as dilute hydrochloric acid, and continue stirring for 1 hour at 60°C; For the seco...

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Abstract

The invention relates to an amorphous boron powder preparation device. The device comprises a sealing body, a reactor (2), a self-propagating reaction initiation assembly, an air inflation valve (7),an air release valve (8), an air guide pipe (9) and a heating body (12); the reactor (2) is used for containing reaction raw materials; the sealing body is used for placing the reactor (2), and the reaction raw materials in the reactor are subjected to heat insulation from the exterior and located in a sealing space in a reaction process; the self-propagating reaction initiation assembly is used for initiating a self-propagating reaction of the reaction raw materials; two air through holes are formed in the sealing body, the air guide pipe (9) penetrates through the air through holes and is connected with the interior and the exterior of the sealing body, and the air inflation valve (7) and the air release valve (8) are arranged on the air guide pipe (9) of the exterior of the sealing body; the heating body (12) is used for heating the sealing body, and accordingly the reaction raw materials in the reactor (2) are pre-heated.

Description

technical field [0001] The invention relates to the technical field of boron powder preparation, in particular to a device for preparing amorphous boron powder and a method for efficiently preparing amorphous boron powder using the device. Background technique [0002] Elemental boron has two structures: crystalline boron and amorphous boron. Amorphous boron is brown powder, and crystalline boron is generally gray-black. Crystalline boron has four crystal forms: α-rhombic crystal, β-rhombic crystal, α-tetragonal crystal and β-tetragonal crystal, and the density of α-rhombic crystal is the highest, which is 2.45g / cm 3 , melting point is 2180°C, sublimates at 3650°C; density of amorphous boron is 2.35g / cm 3 , with a melting point of 2300°C and sublimation at 2550°C. The chemical properties of amorphous boron are more active than crystalline boron. At room temperature, amorphous boron is stable in the air. It starts to oxidize when heated to 300°C. It can burn at 700°C. At hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/02
CPCC01B35/023
Inventor 周星张炜鲍桐邓蕾
Owner NAT UNIV OF DEFENSE TECH
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