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Titanium carbide powder and preparation method thereof

A technology of titanium carbide powder and titanium dioxide, applied in the direction of titanium carbide, carbide, etc., can solve the problems of restricting the industrial production of titanium carbide powder, complicated process, high raw material price, etc., and achieve good crystallization, wide range of raw material sources, and high reaction temperature low effect

Inactive Publication Date: 2012-06-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In short, there are certain deficiencies in the current preparation technology of titanium carbide powder: such as high raw material price, complicated process, difficult control, low output, etc., which greatly limit the industrial production of titanium carbide powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A titanium carbide powder and a preparation method thereof. First use 15~20wt% titanium dioxide, 1~2wt% earthy graphite powder, 60~69wt% lithium chloride, 15~22wt% aluminum powder as raw materials, and mix them evenly; then put the evenly mixed raw materials in the tube In an electric furnace, the temperature was raised to 1000-1100°C at a rate of 2-5°C / min under an argon atmosphere, and kept at a temperature of 1-3 hours; then the product was soaked in hydrochloric acid with a concentration of 2-3mol / L for 3 ~5 hours, filter, wash with deionized water until the pH of the cleaning solution is 7.0, and finally dry at 110°C for 10~16 hours to obtain titanium carbide powder.

[0026] The titanium carbide powder prepared in this example has high purity, no particle agglomeration, and a particle size of 260-400 nm.

Embodiment 2

[0028] A titanium carbide powder and a preparation method thereof. First use 5~10wt% titanium dioxide, 0.5~1.5wt% carbon black, 70~80wt% lithium fluoride, 10~20wt% magnesium powder as raw materials, mix them evenly; In an electric furnace, raise the temperature to 900-1050°C at a rate of 3-6°C / min under an argon atmosphere, and keep it warm for 2-4 hours; then soak the obtained product in hydrochloric acid with a concentration of 3-4mol / L for 3~ After 4 hours, filter, wash with deionized water until the pH of the cleaning solution is 7.0, and finally dry at 110°C for 15-20 hours to obtain titanium carbide powder.

[0029] The titanium carbide powder prepared in this example has high purity, no particle agglomeration, and a particle size of 200-340 nm.

Embodiment 3

[0031] A titanium carbide powder and a preparation method thereof. First use 10~15wt% of titanium dioxide, 0.5~1wt% of earthy graphite powder, 62~70wt% of a mixture of lithium chloride and lithium fluoride, and 18~25wt% of aluminum powder as raw materials, mix well; then mix The uniform raw material is placed in a tubular electric furnace, and the temperature is raised to 950~1100°C at a rate of 5~8°C / min under an argon atmosphere, and the temperature is kept for 3~5 hours; then the obtained product is put into a concentration of 2.5~3.5mol Soak in / L hydrochloric acid for 5-6 hours, filter, wash with deionized water until the pH of the cleaning solution is 7.0, and finally dry at 110°C for 18-24 hours to obtain titanium carbide powder.

[0032] The titanium carbide powder prepared in this example has high purity, no particle agglomeration, and a particle size of 100-220 nm.

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Abstract

The invention specifically relates to titanium carbide powder and a preparation method thereof. According to a technical scheme, the preparation method comprises the following steps of: uniformly mixing 10-25 percent by weight of aluminum powder or magnesium powder, 0.5-2 percent of amorphous graphite powder or carbon black, 5-20 percent by weight of titanium dioxide and 60-80 percent by weight of a halide of lithium serving as raw materials; putting the uniformly-mixed raw materials into a tubular electric furnace, raising the temperature to 900-1,100 DEG C at the temperature raising rate of 2-8 DEG C per minute under the atmosphere of argon, and preserving heat for 1-5 hours; putting an obtained product into hydrochloric acid of which the concentration is 2-4 mol / L for soaking for 3-6 hours, filtering, and cleaning with deionized water till the pH value of a cleaning solution is 7.0; and drying at the temperature of 110 DEG C for 10-24 hours to obtain titanium carbide powder. The method has the characteristics of low reaction temperature, simple process, controllable synthesis process, low production cost, and the like; and the prepared titanium carbide powder has the characteristics of high crystallization, high product purity, freeness from an impure phase and powder particle size of 100-400 nanometers.

Description

technical field [0001] The invention belongs to the technical field of titanium carbide. Specifically relates to a titanium carbide powder and a preparation method thereof. Background technique [0002] Titanium carbide is a typical transition metal carbide. Titanium carbide has excellent properties such as high strength, high hardness, high temperature resistance, acid and alkali corrosion resistance, wear resistance, good electrical conductivity, thermal conductivity and chemical inertness to iron and steel metals, and is a material with great application value. In particular, its fine and ultrafine powders have great development value and application prospects as reinforcement of composite materials. [0003] At present, there are many preparation methods for titanium carbide powder, such as carbothermal reduction method, chemical vapor deposition method, high temperature self-propagating synthesis method and sol-gel method. But these methods all have certain deficienc...

Claims

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Application Information

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IPC IPC(8): C01B31/30C01B32/921
Inventor 王周福张少伟刘浩王玺堂张保国
Owner WUHAN UNIV OF SCI & TECH
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