Low-temperature nitriding-based vanadium nitride powder and preparation method thereof

A low-temperature nitriding and vanadium nitride technology, which is applied in the field of vanadium nitride powder, can solve the problems of increasing the production cost of vanadium nitride products, cumbersome preparation process, long holding time, etc., and achieves low cost, simple process and improved structure The effect of toughness

Inactive Publication Date: 2018-09-25
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Most of the above methods require relatively high synthesis temperature, tedious preparation process and long holding time, thus increasing the production cost of vanadium nitride products

Method used

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  • Low-temperature nitriding-based vanadium nitride powder and preparation method thereof
  • Low-temperature nitriding-based vanadium nitride powder and preparation method thereof

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Effect test

Embodiment 1

[0036] A vanadium nitride powder based on low-temperature nitriding and a preparation method thereof. The preparation method described in this embodiment is:

[0037] According to the mass ratio of aluminum powder: vanadium pentoxide powder: inorganic salt is 1: (0.2~0.025): (0.7~0.75), the aluminum powder, the described vanadium pentoxide powder and the inorganic salt Mix to obtain mixed powder.

[0038] The mixed powder is kept in a nitrogen atmosphere at 700-750° C. for 1-1.5 hours, and naturally cooled to obtain a fired product.

[0039] The burnt product is added into hydrochloric acid solution, soaked for 1-2 hours, washed with distilled water for 3-5 times, and dried at 90-110° C. for 8-12 hours to obtain vanadium nitride powder based on low-temperature nitriding.

[0040] The inorganic salt is sodium chloride.

Embodiment 2

[0042] A vanadium nitride powder based on low-temperature nitriding and a preparation method thereof. The preparation method described in this embodiment is:

[0043] According to the mass ratio of aluminum powder: vanadium pentoxide powder: inorganic salt is 1: (0.25~0.3): (0.75~0.8), the aluminum powder, the described vanadium pentoxide powder and the inorganic salt Mix to obtain mixed powder.

[0044] The mixed powder is kept in a nitrogen atmosphere at 750-800° C. for 1.5-2.0 hours, and naturally cooled to obtain a fired product.

[0045] The burnt product is added into hydrochloric acid solution, soaked for 1-2 hours, washed with distilled water for 3-5 times, and dried at 90-110° C. for 8-12 hours to obtain vanadium nitride powder based on low-temperature nitriding.

[0046] The inorganic salt is sodium fluoride.

Embodiment 3

[0048] A vanadium nitride powder based on low-temperature nitriding and a preparation method thereof. The preparation method described in this embodiment is:

[0049] According to the mass ratio of aluminum powder: vanadium pentoxide powder: inorganic salt is 1: (0.3~0..35): (0.8~0..85), the aluminum powder, the described vanadium pentoxide powder The powder is mixed with the inorganic salt to obtain a mixed powder.

[0050] The mixed powder is kept in a nitrogen atmosphere at 800-850° C. for 2.0-2.5 hours, and naturally cooled to obtain a fired product.

[0051] The burnt product is added into hydrochloric acid solution, soaked for 1-2 hours, washed with distilled water for 3-5 times, and dried at 90-110° C. for 8-12 hours to obtain vanadium nitride powder based on low-temperature nitriding.

[0052] The inorganic salt is a mixture of sodium chloride and sodium fluoride.

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Abstract

The invention relates to low-temperature nitriding-based vanadium nitride powder and a preparation method thereof. The preparation method is characerized in that the low-temperature nitriding-based vanadium nitride powder is prepared from aluminum powder, vanadium pentoxide powder and inorganic salt in a mass ratio of 1:(0.2-0.4):(0.7-0.9). The preparation method comprises the following steps: mixing the aluminum powder, the vanadium pentoxide powder and the inorganic salt to obtain a mixed powder; carrying out heat preservation on the mixed powder at a temperature of 700-900 DEG C for 1 to 3hours in a nitrogen atmosphere, and naturally cooling, so as to obtain a calcined product; and adding the calcined product to a hydrochloric acid solution, soaking for 1 to 2 hours, washing with distilled water for 3 to 5 times, and drying at 90-110 DEG C for 8 to 12 hours, so as to obtain the low-temperature nitriding-based vanadium nitride powder. The preparation method has the characteristics of simple process, short production cycle, low cost and low synthesis temperature. The low-temperature nitriding-based vanadium nitride powder has the advantages of high purity, high strength, good electrical conductivity and good corrosion resistance and 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 low-temperature nitriding and a preparation method thereof. Background technique [0002] Vanadium nitride has the characteristics of high melting point, high electrical conductivity, high hardness and high thermal conductivity, and is widely used in the fields of ceramics, electronics, high-temperature coating and cutting; The role of strengthening and precipitation strengthening. Therefore, the research and preparation of vanadium nitride have attracted extensive attention of scientists and technicians in this field: [0003] KhemchandDewangan etc. used vanadium pentoxide and ammonia as raw materials (KhemchandDewangan, GirishP.Patil, Ranjit V.Kashid, Vivekanand S.Bagal, M.A.More, D.S.Joag, N.S.Gajbhiye, Padmakar G.Chavan.V 2 o 5 precursor-templated synthesis of textured nanoparticles based VN nanoparticles and their...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/06
CPCC01B21/0617C01P2004/30C01P2004/61C01P2004/62
Inventor 丁军刘和兴王杏邓承继余超祝洪喜
Owner WUHAN UNIV OF SCI & TECH
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