Preparation method of titanium carbide

A technology of titanium carbide and iron-titanium, which is applied in the direction of titanium carbide, chemical instruments and methods, carbides, etc., can solve the problems of limited particle size of titanium carbide, difficulty in preparing nano-scale titanium carbide products, etc., and achieve low production cost Effect

Active Publication Date: 2022-05-20
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a preparation method of titanium carbide to solve the problem that the particle size of titanium carbide is limited by the particle size of raw materials in the existing preparation method of titanium carbide, and it is difficult to prepare nano-scale titanium carbide products

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  • Preparation method of titanium carbide
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[0022] As described in the background technology, the particle size of titanium carbide in the existing titanium carbide preparation method is limited by the particle size of raw materials, which makes it difficult to prepare nano-sized titanium carbide products. In order to solve the above-mentioned technical problems, the present application provides a method for preparing titanium carbide, the preparation method comprising: placing a graphite crucible containing an iron-titanium binary alloy in a vacuum reaction furnace, and heating to make the iron-titanium binary alloy The alloy is melted and compounded to obtain a compounded product; the compounded product is quenched to obtain a quenched product; and the quenched product is subjected to acid leaching to remove metallic iron to obtain titanium carbide.

[0023] Iron-titanium alloy and high-purity graphite crucible are used as raw materials. During the heating process, metallic iron will form Fe-C binary low-melting point ...

Embodiment 1

[0035] Put the FeTi alloy into a high-purity graphite crucible, and the mole fraction of Ti in the FeTi alloy is 5%. The vacuum degree in the vacuum reaction furnace was evacuated to 0.01Pa, the electromagnetic door was closed, and the temperature of the reaction furnace was raised to 1500°C at a rate of 10°C, and kept for 20 minutes to carry out the compound reaction and obtain the compound product.

[0036] After the heat preservation is over, close the heating program, open the electromagnetic door, raise the graphite crucible to the quenching zone and spray high-purity argon gas for quenching to obtain the quenched product.

[0037] Use 1mol / L sulfuric acid to pickle the quenched product to remove metallic iron and obtain titanium carbide particles with a particle size of 130nm. The leaching solution is evaporated to obtain FeSO 4 . FeSO 4 Put it in a reaction furnace and heat it to 600°C to get Fe 2 o 3 , and SO 2 and SO 3 of mixed gas. The mixed gas can be used t...

Embodiment 2

[0039] Put the FeTi alloy into a high-purity graphite crucible, and the mole fraction of Ti in the FeTi alloy is 20%. The vacuum degree in the vacuum reaction furnace was evacuated to 0.1 Pa, the electromagnetic door was closed, and the temperature of the reaction furnace was raised to 1600° C. at a rate of 10° C., and kept for 30 minutes to carry out the compound reaction and obtain the compound product.

[0040] After the heat preservation is over, close the heating program, open the electromagnetic door, raise the graphite crucible to the quenching zone and spray high-purity argon gas for quenching to obtain the quenched product.

[0041] Use 2mol / L sulfuric acid to pickle the quenched product to remove metallic iron and obtain titanium carbide particles with a particle size of 160nm. The leaching solution is evaporated to obtain FeSO 4 . FeSO 4 Put it in a reaction furnace and heat it to 650°C to get Fe 2 o 3 , and SO 2 and SO 3 of mixed gas. The mixed gas can be u...

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Abstract

The invention provides a preparation method of titanium carbide. The preparation method comprises: heating a graphite crucible containing an iron-titanium binary alloy in a vacuum reaction furnace to melt the iron-titanium binary alloy and carry out a compound reaction to obtain a compound product; quenching the compound product to obtain the quenched product; and acid leaching the quenched product to remove metallic iron to obtain titanium carbide. The above preparation method uses the in-situ synthesis method to prepare titanium carbide, the particle size of the product is not affected by the particle size of the raw material, and Fe and sulfuric acid in the raw material can be recycled and reused, so the production cost is lower.

Description

technical field [0001] The invention relates to the field of titanium carbide synthesis, in particular to a preparation method of titanium carbide. Background technique [0002] Titanium carbide has a NaCl type cubic crystal structure, the unit cell parameter is 0.4327nm, and the space group is Fm3m. It has the characteristics of high melting point, high hardness, wear resistance and corrosion resistance, and also has good thermal conductivity, electrical conductivity and chemical stability. Therefore, it is widely used in composite ceramic materials, aerospace materials, cutting tools and wear-resistant materials. At present, the methods for preparing titanium carbide at home and abroad mainly include carbothermal reduction of TiO 2 method, direct reaction method, sol-gel method, microwave synthesis method, mechanical ball milling method and chemical vapor deposition method, etc. In industry, titanium dioxide and carbon black are generally used as raw materials, and titan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/921C01G49/06C01B17/50C01B17/74
CPCC01B32/921C01G49/06C01B17/50C01B17/745C01B17/74Y02P10/20
Inventor 苟海鹏陈学刚裴忠冶吕东陈宋璇
Owner CHINA ENFI ENGINEERING CORPORATION
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