Sol-gel method for preparing sub-micrometer level titanium carbide powder material

A technology of sol-gel method and titanium carbide powder is applied in the field of preparing sub-micron titanium carbide powder materials by sol-gel method, which can solve the problems of complex process flow, high production cost, unfavorable industrialized production and the like, and achieves the process flow Simple, low cost, easy to industrialize the effect

Active Publication Date: 2016-08-03
UNIV OF SCI & TECH BEIJING
4 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The method has high production cost and complex technologica...
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Method used

Embodiment 2: Titanium dioxide, phenolic resin and methanol are mixed according to the molar ratio of 1:0.7:0.7, and it is stirred evenly by electromagnetic stirring, and the stirring speed is 200rpm, and the stirring time is 4 hours. The mixed solution was dried at 100° C. for 3 hours to obtain a titanium dioxide/phenolic resin precursor. The precursor was put into an alumina crucible, and under an argon protective atmosphere, the temperature was raised to 1500°C at a rate of 5°C/min, kept for 5 hours, and then lowered to room temperature at a rate of 5°C/min. % of titanium carbide powder, the particle size is about 500nm, and the ...
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Abstract

The invention relates to a sol-gel method for preparing a sub-micrometer level titanium carbide powder material. The preparation method comprises the following steps: evenly mixing common titanium dioxide, phenolic resin, and methanol according to a mole ratio of 1:0.5-0.8:1.9-3.05 at a room temperature, stirring, storing the mixture at a temperature of 70 to 110 DEG C for 2 to 4 hours to obtain a titanium dioxide/phenolic resin precursor; heating the precursor in a high temperature furnace, and storing the precursor at a temperature of 1300 to 1700 DEG C for 2 to 6 hours in an atmosphere of argon so as to obtain sub-micrometer level (200 nm to 1 [mu]m) titanium carbide powder. During the reaction process, phenolic resin is thermally degraded into amorphous carbon with a high activity, amorphous carbon wraps titanium dioxide powder to form a shell-core microscopic structure, thus the contact surface between reactants is greatly increased, and the carbon thermal reduction reactions are promoted. The provided method has the advantages that the raw materials are cheap, the sintering temperature of titanium carbide powder in industrial production is reduced, moreover, the sintering time is short, the technology is simple, and the method can be easily applied to industrial production.

Technology Topic

Sol-gelTitanium carbide +12

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  • Sol-gel method for preparing sub-micrometer level titanium carbide powder material
  • Sol-gel method for preparing sub-micrometer level titanium carbide powder material

Examples

  • Experimental program(3)

Example Embodiment

[0018] Embodiment 1: Titanium dioxide, phenolic resin and methanol are mixed according to the molar ratio of 1:0.6:0.6, and are stirred uniformly by electromagnetic stirring, and the stirring speed is 300rpm, and the stirring time is 3 hours. The mixed solution was dried at 110° C. for 2 hours to obtain a titanium dioxide/phenolic resin precursor. The precursor was placed in an alumina crucible, heated to 1600°C at a rate of 5°C/min under an argon protective atmosphere, kept for 4 hours, and then lowered to room temperature at a rate of 5°C/min, and finally obtained a purity greater than 99.5°C. % of titanium carbide powder.
[0019] figure 1 is the X-ray diffraction pattern (XRD) of the titanium dioxide/phenolic resin precursor, figure 2 (a) is the XRD pattern of the product when the carbothermic reduction temperature is 1600 °C, which proves that the product is titanium carbide (PDF card number 65-8807), and there is no other impurity phase. figure 2 (b) is a scanning electron microscope photo of titanium carbide. It can be seen that the particle size of the titanium carbide powder is about 400 nm, and the size is uniform.

Example Embodiment

[0020] Embodiment 2: Titanium dioxide, phenolic resin and methanol are mixed according to the molar ratio of 1:0.7:0.7, and are stirred uniformly by electromagnetic stirring, and the stirring speed is 200rpm, and the stirring time is 4 hours. The mixed solution was dried at 100° C. for 3 hours to obtain a titanium dioxide/phenolic resin precursor. The precursor was put into an alumina crucible, heated to 1500°C at a rate of 5°C/min under an argon protective atmosphere, kept for 5 hours, and then lowered to room temperature at a rate of 5°C/min, and finally a purity greater than 99.5 was obtained. % titanium carbide powder, the particle size is about 500nm, and the size is uniform.

Example Embodiment

[0021] Embodiment 3: Titanium dioxide, phenolic resin and methanol are mixed according to the molar ratio of 1:0.7:0.7, and are stirred uniformly by electromagnetic stirring, and the stirring speed is 400rpm, and the stirring time is 2 hours. The mixed solution was dried at 90° C. for 4 hours to obtain a titanium dioxide/phenolic resin precursor. The precursor was placed in an alumina crucible, heated to 1400°C at a rate of 5°C/min under an argon protective atmosphere, kept for 6 hours, and then lowered to room temperature at a rate of 5°C/min, and finally obtained a purity greater than 99.5°C. % titanium carbide powder, the particle size is about 600nm, and the size is uniform.

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Description & Claims & Application Information

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