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

[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 scann

[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.

[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.