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Process for preparing nano vanadium carbide powder

A vanadium carbide and nano-scale technology is applied in the field of preparation of nano-scale vanadium carbide powder, which can solve the problems of large particle size of vanadium carbide powder and cannot meet the application of vanadium carbide powder, etc., and achieves the effects of saving energy, abundant raw materials and shortening reaction time.

Active Publication Date: 2006-12-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main problem of the above two methods is that the particle size of the vanadium carbide powder obtained is relatively large, which cannot satisfy the application of vanadium carbide powder in modern industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The catalyst (CaF 2 、LaCl 3 or CeCl 3 ) was dissolved in 50ml of deionized water (50°C-100°C), stirred to obtain a uniformly mixed solution, placed in a drying oven, heated at 100-300°C for 1-2 hours, and dried at 50-100°C 1-5h, and finally obtain the precursor powder containing vanadium source and carbon source. Put the precursor powder in a high-temperature reaction furnace, under vacuum conditions, keep it warm at 600°C for 30-60 minutes, and at 800-950°C for 30-60 minutes, prepare nano Vanadium carbide powder.

Embodiment 2

[0023] The catalyst (CaF 2 , YCl 3 or NdCl 3 ) was dissolved in 50ml of distilled water (50°C-100°C), stirred to obtain a uniformly mixed solution, the solution was placed in a drying oven, heated at 100-300°C for 1-2 hours, and dried at 50-100°C for 1-2 hours After 5h, the precursor powder containing vanadium source and carbon source was finally obtained. Put the precursor powder in a high-temperature reaction furnace, under the protection of argon or hydrogen, keep it warm at 600°C for 30-60min, and at 800-950°C for 30-60min, the average particle size <100nm, particle size Uniformly distributed nano vanadium carbide powder.

Embodiment 3

[0025] 6.4g powdered ammonium metavanadate, 10.0g powdered glucose and 0.01% to 2% catalyst (CaF 2 、LaCl 3 or CeCl 3 ) was dissolved in 50ml of deionized water (50°C-100°C), stirred to obtain a uniformly mixed solution, placed in a drying oven, heated at 100-300°C for 1-2 hours, and dried at 50-100°C 1-5h, and finally obtain the precursor powder containing vanadium source and carbon source. Put the precursor powder in a high-temperature reaction furnace, under vacuum conditions, keep it warm at 600°C for 30-60 minutes, and at 800-900°C for 30-60 minutes, prepare nano Vanadium carbide powder.

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Abstract

The invention discloses a preparing method of nanometer vanadium carbide powder, which is characterized by the following: dissolving raw material of powder-shaped ammonium vanadate, carbonaceous reducer and micro-dose rare earth as catalyst according to certain proportion in the deionized water or distilled water; stirring evenly; preparing solution; heating solution; drying; producing priority powder with vanadium source and carbon source; carbonizing priority powder in the high-temperature reactor protected by vacuum or gas for 30-60 min at 800-950 deg.c; obtaining vanadium carbide powder with even distributing grain (even grain is less than 100 nm).

Description

technical field [0001] The invention provides a preparation method of nano-scale vanadium carbide powder, which belongs to the field of preparation of nano-scale ceramic powder. Background technique [0002] Vanadium carbide is an important vanadium alloy additive. Vanadium is used in the iron and steel industry to form refractory carbides with carbon, and these compounds can play a role in precipitation hardening and grain refinement in steel. Vanadium carbide can be used in structural steel, tool steel, pipe steel, steel bar, general engineering steel and cast iron. [0003] In addition, vanadium carbide has been widely used in industry as an inhibitor of ultrafine cemented carbide grains, high-temperature coatings, and as a carbon source for synthetic diamonds. What is needed in industrial applications is vanadium carbide powder with fine particle size and single phase composition. For example, when preparing ultra-fine cemented carbide, the particle size of WC powder s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30C04B35/56C04B35/626
Inventor 刘颖赵志伟曹泓高升吉涂铭旌
Owner SICHUAN UNIV
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