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TiN powder material and preparation method thereof

A raw material and powder technology, applied in the field of TiN powder raw material and its preparation, can solve the problems of low production efficiency, high production equipment requirements, and high impurity content.

Inactive Publication Date: 2010-07-28
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the plasma chemical vapor deposition method and the molten salt electrolysis method have high requirements for production equipment, high production costs, and are difficult to industrialize production; the high-energy ball milling method has more impurities and lower production efficiency; the direct nitriding method of metal titanium powder The reaction temperature is generally above 1000°C, the reaction time is long, and the particle size distribution of the product is uneven

Method used

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  • TiN powder material and preparation method thereof
  • TiN powder material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Raw materials and ratio:

[0018] Rutile TiO 2 The amount of powder added is 75.2wt%, of which TiO 2 The content percentage is 95.0%, and the average particle size is less than 0.074mm; the coke powder addition is 24.8wt%, and the C content percentage is 90.0%, and the average particle size is less than 0.150mm. The addition amount of the external binder (silica sol) is 2-3% of the total batching mass.

[0019] Ingredients, mix:

[0020] First, various raw materials are loaded into a mixer according to the above proportions, and dry ball milled for 10 hours to fully mix the raw materials evenly, the particle size is less than 0.150mm, and the sieve residue of the aperture is less than 2.0wt%.

[0021] Shaped or balled:

[0022] Put the raw materials mixed by ball mill into the mixer, add appropriate amount of water and mix them, and then shape the materials into green bodies on the molding machine (or shape them into spherical particles with a ball forming machine)....

Embodiment 2

[0029] Raw materials and ratio:

[0030] Anatase Ti0 2 Powder addition is 75.2wt%, wherein Ti0 2 The content percentage is 92.0%, and the average particle size is less than 0.074mm; the addition amount of coke powder is 24.8wt%, and the C content percentage is 90.0%, and the average particle size is less than 0.150mm. The addition amount of the external binding agent (polyvinyl alcohol) is 2-3% of the total batching quality.

[0031] Ingredients, mix:

[0032] Firstly, various raw materials are loaded into a mixer according to the above ratio, and dry ball milled for 8 hours to fully mix the raw materials evenly, the particle size is less than 0.150mm, and the sieve residue of the aperture is less than 2.0wt%.

[0033] Shaped or balled:

[0034] Put the raw materials mixed by ball mill into the mixer, add appropriate amount of water and mix them, and then shape the materials into green bodies in the molding machine (or shape them into spherical particles with a ball formin...

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Abstract

The invention relates to a TiN powder material and a preparation method thereof, belonging to the technical field of preparation of high-temperature-resistant material and abrasion-proof material. The method is characterized in that carbothermic reduction is carried out on coke dust, graphite, or carbon black in appropriate high-temperature environment and nitrogen atmosphere for azotizing TiO2 to prepare synthetic TiN material and the TiN powder material is obtained by technical processes such as breakage, smashing, fine grinding and the like. The TiN powder prepared by the method of the invention features uniform grain diameter, uniform composition, low impurity content and can serve as the raw material for preparing crucible, cutting tool, metal ceramic, spraying material, high technology ceramics and the like. In addition, the new method for preparing the TiN powder material has the outstanding advantages of simple processing equipment, high product purity, low cost and low energy consumption in the process of preparation and convenient mass production, thus being suitable for preparing composite power such as titanium nitride powder, titanium nitride and other nitrides; in addition the TiN powder material provides a new technological approach for efficient and value-added application of natural raw mineral materials rich in TiO2.

Description

Technical field: [0001] The invention relates to a TiN powder raw material and a preparation method thereof, belonging to the technical field of preparation of high-temperature-resistant and wear-resistant materials. Background technique: [0002] Titanium nitride has high melting point, high hardness, high temperature chemical stability and excellent thermal conductivity and electrical conductivity. It can be used to improve the wear resistance of superhard materials. It is often used to manufacture molten metal crucibles, cutting tools, and imitation gold for decorative materials. Materials such as coatings and precision ceramics are used in the field of high-temperature materials or wear-resistant materials in special heat-resistant, corrosion-resistant, wear-resistant and other environments. However, the high firing temperature of titanium nitride powder limits its wide application. Therefore, it is of great practical significance to study new methods for synthesizing t...

Claims

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Application Information

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IPC IPC(8): C01B21/076
Inventor 陈凯黄朝晖徐友果欧阳欣房明浩刘艳改
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)