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Synthetic method of spherical tungsten carbide powder

A technology of tungsten carbide powder and synthesis method, which is applied in the direction of carbide, tungsten/molybdenum carbide, etc., can solve the problems that cannot meet the requirements of special fields, irregular shape of tungsten carbide powder, etc., and achieve easy industrialization, simple synthesis, The effect of high purity

Active Publication Date: 2015-04-29
南昌硬质合金有限责任公司
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  • Description
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Problems solved by technology

[0003] The existing method of preparing tungsten carbide powder is to directly calcine tungsten powder and carbon black at high temperature, and the shape of the obtained tungsten carbide powder is irregular, which cannot meet the requirements of special fields.

Method used

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  • Synthetic method of spherical tungsten carbide powder
  • Synthetic method of spherical tungsten carbide powder
  • Synthetic method of spherical tungsten carbide powder

Examples

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Embodiment 1

[0011] A method for synthesizing spherical tungsten carbide powder. The soluble tungsten source with a molar ratio of 1:20 and the glucose aqueous solution with a mass concentration of 5% are reacted in a high-pressure reactor at 200°C for 24 hours, filtered and then air-dried at a temperature of 80°C. , and then calcined in a 14-tube furnace with hydrogen at 800°C for 8 hours to prepare the reduced prepolymer, and then calcined in a molybdenum wire furnace at 1000°C for 3 hours for carbonization.

[0012] The soluble tungsten source is WCl 6 .

Embodiment 2

[0014] A method for synthesizing spherical tungsten carbide powder. The soluble tungsten source with a molar ratio of 1:30 and the glucose aqueous solution with a mass concentration of 7% are reacted in a high-pressure reactor at 200°C for 24 hours, filtered and then air-dried at a temperature of 90°C. , and then calcined in a 14-tube furnace with hydrogen at 900°C for 9 hours to prepare the reduced prepolymer, and then calcined in a molybdenum wire furnace at 1200°C for 3-5 hours for carbonization.

[0015] The soluble tungsten source is ammonium metatungstate.

Embodiment 3

[0017] A method for synthesizing spherical tungsten carbide powder. The soluble tungsten source with a molar ratio of 1:25 and the glucose aqueous solution with a mass concentration of 8% are reacted in a high-pressure reactor at 200°C for 24 hours, filtered and then air-dried at a temperature of 85°C. , and then calcined in a 14-tube furnace with hydrogen at 950°C for 9 hours to prepare the reduced prepolymer, and then calcined in a molybdenum wire furnace at 1300°C for 4 hours for carbonization.

[0018] The soluble tungsten source is sodium tungstate.

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Abstract

The invention discloses a synthetic method of spherical tungsten carbide powder. The synthetic method comprises the steps of preparing a spherical skeleton by taking a glucose solution as a carbon source template; and then preparing the spherical tungsten carbide powder by taking a soluble tungsten salt such as WCl6, ammonium metatungstate (AMT), sodium tungstate and potassium tungstate as a tungsten source at a certain technical condition and molar ratio.

Description

technical field [0001] The invention relates to a synthesis method of tungsten carbide powder, in particular to a synthesis method of spherical tungsten carbide powder. technical background [0002] Spherical WC powder has high hardness, high wear resistance, acid and alkali resistance, and high chemical stability. It has a wide range of potential application values ​​in fuel cell anodes, cathode catalyst materials, gas sensors, petroleum catalysts, and photocatalyst materials. [0003] The existing method of preparing tungsten carbide powder is to directly calcine tungsten powder and carbon black at high temperature, and the shape of the obtained tungsten carbide powder is irregular, which cannot meet the requirements of special fields. Contents of the invention [0004] The purpose of the present invention is to provide a synthetic method of spherical tungsten carbide powder. The present invention uses glucose solution as a carbon source template to prepare a spherical s...

Claims

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Application Information

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IPC IPC(8): C01B31/34C01B32/949
Inventor 钟毓斌孙娟姜萍郑龙珍
Owner 南昌硬质合金有限责任公司
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