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Vanadium nitride powder based on liquid phase carbothermic method and preparation method of vanadium nitride powder

A vanadium nitride and powder technology, applied in the field of vanadium nitride powder, can solve the problems of being unfavorable to large-scale industrial production, increasing the production cost of vanadium nitride, low purity of vanadium nitride, etc., and achieving low cost and production cycle. Short, high-purity effects

Inactive Publication Date: 2018-09-18
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The vanadium nitride prepared by this method has low purity, high reaction temperature and long holding time, which are not conducive to large-scale industrial production.
[0007] Most of the above methods require high reaction temperature and long holding time, thereby increasing the production cost of preparing vanadium nitride

Method used

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  • Vanadium nitride powder based on liquid phase carbothermic method and preparation method of vanadium nitride powder
  • Vanadium nitride powder based on liquid phase carbothermic method and preparation method of vanadium nitride powder

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Embodiment 1

[0034] A vanadium nitride powder based on a liquid-phase carbothermal method and a preparation method thereof. The preparation method described in this embodiment is:

[0035] According to vanadium pentoxide powder: carbon powder: inorganic salt mass ratio is 1: (2 ~ 2.4): (4 ~ 4.5), the described vanadium pentoxide powder, the carbon powder and the inorganic salt are mixed , to obtain a mixed powder.

[0036] The mixed powder is kept at 900-950° C. for 2.5-3 hours in a nitrogen atmosphere, and naturally cooled to obtain a fired product.

[0037] Add the burnt product into the hydrochloric acid solution, soak for 1-2 hours, wash with distilled water for 3-5 times, and dry at 90-110°C for 8-12 hours; then place it in a muffle furnace and heat up to 450-490°C , cooled naturally to prepare vanadium nitride powder based on liquid-phase carbothermal method.

[0038] The inorganic salt is a mixture of potassium iodide and potassium fluoride; in the mixture: the mass ratio of pota...

Embodiment 2

[0040] A vanadium nitride powder based on a liquid-phase carbothermal method and a preparation method thereof. The preparation method described in this embodiment is:

[0041] According to vanadium pentoxide powder: carbon powder: inorganic salt mass ratio is 1: (2.2 ~ 2.6): (4.5 ~ 5.0), the described vanadium pentoxide powder, the carbon powder and the inorganic salt are mixed , to obtain a mixed powder.

[0042] The mixed powder is kept in a nitrogen atmosphere at 950-1000° C. for 2-2.5 hours, and naturally cooled to obtain a fired product.

[0043] Add the calcined product into hydrochloric acid solution, soak for 1-2 hours, wash with distilled water for 3-5 times, dry at 90-110°C for 8-12 hours; then place it in a muffle furnace and heat up to 470-510°C , cooled naturally to prepare vanadium nitride powder based on liquid-phase carbothermal method.

[0044] The inorganic salt is potassium fluoride.

Embodiment 3

[0046] A vanadium nitride powder based on a liquid-phase carbothermal method and a preparation method thereof. The preparation method described in this embodiment is:

[0047] According to vanadium pentoxide powder: carbon powder: inorganic salt mass ratio is 1: (2.4~2.8): (5.0~5.5), described vanadium pentoxide powder, described carbon powder and described inorganic salt are mixed , to obtain a mixed powder.

[0048] The mixed powder is kept in a nitrogen atmosphere at 1000-1050° C. for 1.5-2 hours, and naturally cooled to obtain a fired product.

[0049] Add the calcined product into the hydrochloric acid solution, soak for 1-2 hours, wash with distilled water for 3-5 times, and dry at 90-110°C for 8-12 hours; then place it in a muffle furnace and heat up to 490-530°C , cooled naturally to prepare vanadium nitride powder based on liquid-phase carbothermal method.

[0050] The inorganic salt is potassium iodide.

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Abstract

The invention relates to vanadium nitride powder based on a liquid phase carbothermic method and a preparation method of the vanadium nitride powder. The technical scheme comprises the following stepsof: mixing vanadium pentoxide powder, carbon powder and inorganic salts at a mass ratio of 1:(2-3):(4-6) so as to obtain mixed powder, performing thermal insulation on the mixed powder in a nitrogenatmosphere at 900-1,100 DEG C for 1-3 hours, and performing natural cooling to obtain a calcined product; adding the calcined product into a hydrochloric acid solution, performing soaking for 1-2 hours, performing wash with distilled water 3-5 times, performing drying at 90-110 DEG C for 8-12 hours, then putting the dried product in a muffle furnace, heating to 450-550 DEG C, and performing natural cooling so as to obtain the vanadium nitride powder based on the liquid phase carbothermic method. The vanadium nitride powder based on the liquid phase carbothermic method and the preparation method of the vanadium nitride powder have the characteristics of a simple process, low synthesis temperature, a short production cycle and low cost, and the prepared vanadium nitride powder based on the liquid phase carbothermic method has high strength, high purity, good electrical conductivity and good mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of vanadium nitride powder. Specifically relates to a vanadium nitride powder based on a liquid-phase carbothermal method and a preparation method thereof. Background technique [0002] Due to its excellent mechanical properties, vanadium nitride is widely used in the field of cutting processing. Vanadium nitride is also used in steel, which plays a role in fine grain strengthening and precipitation strengthening of steel, and can significantly improve the wear resistance of steel. , corrosion resistance, toughness, strength, ductility and thermal fatigue resistance and other comprehensive properties; in addition, vanadium nitride materials also have potential application prospects in optoelectronics. Therefore, the research and preparation of vanadium nitride have attracted extensive attention of scientists and technicians in this field: [0003] Z.W.Zhao et al. used ammonium vanadate and carbon powder as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/06
CPCC01B21/0617C01P2002/72C01P2004/03C01P2004/61
Inventor 丁军王杏刘和兴邓承继余超祝洪喜
Owner WUHAN UNIV OF SCI & TECH
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