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Process for preparing nano vanadium nitride and nano vanadium carbonitride powder

A technology of nano-vanadium nitride and nano-carbon, which is applied in the direction of nitrogen and non-metallic compounds, nitrogen-metal/silicon/boron binary compounds, etc., can solve the problems of low reaction temperature, long reaction time, complicated process, etc., and achieve the goal of reaction The effect of low temperature, short reaction time and simple process

Active Publication Date: 2007-01-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the previous methods, this method has many advantages, such as low reaction temperature, and can produce nano-scale vanadium nitride powder, etc., but there are also some shortcomings: the process is more complicated when preparing vanadium pentoxide monohydrate powder, and the cycle time is high. Longer; nitriding time 3-5 hours, longer reaction time
At present, there is no research report on nano-scale vanadium carbonitride powder. It is expected that nano-vanadium carbonitride will have broad application prospects in the fields of high-performance steel, ultra-fine cemented carbide, catalysts, and superconducting materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 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, keep it warm for 30-60 minutes at 600 ° C, and pass 0.02 MPa of N 2 , under the conditions of 800-950°C and 30-60min, the nano-vanadium nitride powder with an average particle size of <100nm and uniform particle size distribution is prepared.

Embodiment 2

[0021] 6.8g powdered ammonium metavanadate, 9.0g powdered glucose and 0.01% to 2% 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, keep it warm for 30-60 minutes at 600 ° C, and pass 0.02 MPa of N 2 , under the conditions of 800-900°C and 30-60min, the nano-vanadium nitride powder with an average particle size of <100nm and uniform particle size distribution is prepared.

Embodiment 3

[0023] 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, keep it warm for 30-60 minutes at 600 ° C, and pass 0.01 MPa of N 2 , under the conditions of 800-950°C and 30-60min, the nano-vanadium carbonitride powder with an average particle size of <100nm and uniform particle size distribution is prepared.

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PUM

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Abstract

The preparation process of nanometer vanadium nitride powder and nanometer vanadium carbo-nitride powder with the material including powdered ammonium vanadate, carbon reductant and small amount of RE catalyst includes the following steps: dissolving in deionized water or distilled water through stirring to prepare solution; heating the solution and drying to obtain precursor powder containing vanadium source and carbon source; reacting the precursor powder with introduced reducing gas inside a high temperature reaction furnace at 800-950 deg.c for 30-60 min to obtain nanometer vanadium nitride powder and nanometer vanadium carbo-nitride powder of size smaller than 100nm and with homogeneous size distribution. The process of the present invention has the features of low reaction temperature, short reaction time, low production cost, etc and is suitable for industrial production.

Description

technical field [0001] The invention provides a method for preparing nano-scale vanadium nitride and nano-scale vanadium carbonitride powder, which belongs to the field of nano-scale ceramic powder preparation. Background technique [0002] Vanadium nitride has high relative density (6.04), high melting point (2350°C), high hardness (Mohs hardness 9-10), high thermal and chemical stability and strong mechanical properties. Vanadium nitride is widely used in extreme Hard cutting tools, abrasives and structural materials. Vanadium nitride is superconducting and is a major component of many magnetic and electronic components. Vanadium nitride is also an excellent catalyst. Its catalytic behavior is similar to that of platinum, palladium, rhodium and other noble metals. It has high catalytic activity and selectivity, as well as good stability and anti-poisoning performance. substitution. [0003] Compared with micron vanadium nitride, nano-vanadium nitride has the following a...

Claims

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Application Information

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IPC IPC(8): C01B21/06C01B21/082C04B35/58C04B35/56C04B35/626
Inventor 刘颖赵志伟曹泓高升吉涂铭旌
Owner SICHUAN UNIV
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