Preparation method and application of powder material

A technology of powder materials and melts, applied in the field of micro-nano materials, can solve problems such as high cost

Active Publication Date: 2021-01-12
赵远云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the impurity content of metals or alloys is mainly controlled by controlling the purity of raw materials and the degree of vacuum, which is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] The present embodiment provides a kind of preparation method of nanometer B powder, and this preparation method comprises the steps:

[0133] The molecular formula of the selected formula is Cu 80 B 20 According to the formula, the raw materials are weighed, and the composition is Cu obtained by vacuum induction melting. 80 B 20 The alloy melt, the alloy melt is passed through the method of quick solidification of the copper roller with a speed of ~ 10 6 K / s rate to fabricate Cu with a thickness of ~15 μm 80 B 20 The thin strip-shaped primary alloy fragments have a microstructure including a matrix phase composed of Cu and a dispersed particle phase composed of nano-B particles, wherein the particle size of the dispersed particle phase is 2 nm to 100 nm.

[0134] At room temperature, 0.25 g of the above-prepared Cu 80 B 20 The initial alloy fragments were submerged in 50 mL of aqueous hydrochloric acid solution with a concentration of 2 mol / L and a temperature of...

Embodiment 2

[0136] The present embodiment provides a kind of preparation method of submicron B powder, and this preparation method comprises the following steps:

[0137] The molecular formula of the selected formula is Sn 98 B 2 According to the formula, the raw materials are weighed, and the composition is Sn by vacuum induction melting. 98 B 2 The alloy melt, the alloy melt is passed through the method of quick solidification of the copper roller with 10 3 K / s~10 4 K / s rate to prepare Sn with a thickness of 150 μm 98 B 2 The microstructure of the thin strip-shaped primary alloy fragments includes a matrix phase composed of Sn and a dispersed granular phase composed of submicron B particles, wherein the particle size of the dispersed granular phase is 100nm-2μm.

[0138] At room temperature, 0.25 g of the above-prepared Sn 98 B 2 The initial alloy fragments were submerged in 50 mL of sulfuric acid aqueous solution with a concentration of 0.5 mol / L for reaction. During the react...

Embodiment 3

[0140] The present embodiment provides a kind of preparation method of nano-Bi powder, and this preparation method comprises the steps:

[0141] The molecular formula of the selected formula is Al 75 B i25 According to the formula, the raw materials are weighed, and the composition is obtained by vacuum induction melting 75 B i25 alloy melt. The alloy melt ~ 10 6 K / s rate to prepare Al with a thickness of ~20μm 75 B i25 The microstructure of the thin alloy strip includes a matrix phase composed of Al and a dispersed particle phase composed of nano-Bi particles, wherein the particle size of the dispersed particle phase is 2nm-150nm.

[0142] At room temperature, 0.5 g of the above-prepared Al75 B i25 The initial alloy fragments were submerged in 50 mL of aqueous hydrochloric acid with a concentration of 1 mol / L for reaction. During the reaction process, the matrix phase composed of the active element Al reacts with the acid and enters the solution, while the nano-Bi par...

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Abstract

The invention relates to a preparation method and application of a powder material. The preparation method comprises the following steps of obtaining an initial alloy strip containing a matrix phase and a dispersed particle phase through solidification of an alloy melt, removing the matrix phase in the initial alloy strip, and retaining the dispersed particle phase at the same time, so as to obtain the powder material composed of the original dispersed particle phase. The preparation method is simple in process, can be used for preparing nano-scale, sub-micron-scale and micron-scale powder materials with various sizes, and has a good application prospect in the fields of catalytic materials, powder metallurgy, composite materials, wave-absorbing materials, sterilization materials, metal injection molding, 3D printing, coatings and the like.

Description

technical field [0001] The invention relates to the technical field of micro-nano materials, in particular to a preparation method and application of a powder material. Background technique [0002] The preparation methods of ultrafine powder materials with micron, submicron and nanometer particle sizes are divided into solid phase method, liquid phase method and gas phase method according to the state of matter. Among them, the solid-phase method mainly includes mechanical pulverization, ultrasonic pulverization, thermal decomposition, explosion method, etc., and the liquid-phase method mainly includes precipitation method, alkoxide method, carbonyl method, spray heat drying method, freeze-drying method, electrolysis method, Chemical condensation method, gas phase method mainly includes gas phase reaction method, plasma method, high temperature plasma method, evaporation method, chemical vapor deposition method, etc. [0003] Although there are many methods for the prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00B82Y40/00C01B35/02C01B33/021C01B32/05C01B32/15
CPCB22F9/082B82Y40/00C01B35/023C01B33/021C01B32/05C01B32/15C01P2004/64C01P2004/62C01P2004/61C01P2004/32B22F1/145Y02P10/25B82Y30/00B22F1/054B22F2998/10B22F2999/00B22F2998/00B22F9/16B22F1/142B22F2202/13B22F1/065C22C1/0425C22C1/0433C22C1/045C22C1/0466C22C33/02C22C1/02B22F2201/20B22F2202/05C23F1/00B22F9/08B22F2009/0836B22F2202/06B22F1/05B22F1/056B22F2301/00B22F2301/10B22F2301/15B22F2301/20B22F2301/255B22F2301/35B22F2304/054B22F2304/056B22F2304/058B22F2304/10
Inventor 赵远云刘丽
Owner 赵远云
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