Nanocrystalline carbon titanium carbonitride powder containing grain growing inhibitor and preparation thereof
A technology of grain growth and titanium carbonitride, which is applied in the direction of nitrogen and non-metallic compounds, can solve the problems of difficulty in mixing uniformly and particle size matching, and achieve energy saving, narrow particle size distribution range, and short reaction time.
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[0028] Example 1:
[0029] The nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) And glucose as raw materials, in terms of weight percentage, of which 48.89% of nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) 0.34%, glucose 50.77%, dissolve the above-mentioned raw materials in deionized water at about 30°C and stir evenly to obtain a suspension, and then the suspension is dehydrated and dried at about 60°C for about 4 hours. Heat treatment at about 100°C for about 4 hours, and then quench it to obtain precursor powder. Place the powder in a carbon tube reduction reactor, and perform carbonization reduction and nitridation reactions at a temperature of about 1000°C in a nitrogen atmosphere. In about 4 hours, a titanium carbonitride powder containing a grain growth inhibitor with an average grain size of less than 100 nm was prepared.
Example Embodiment
[0030] Example 2:
[0031] The nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) And sucrose as raw materials, in which titanium dioxide is 49.66%, ammonium metavanadate 1.39%, and sucrose 48.95%. The above raw materials are dissolved in deionized water at about 90°C and stirred evenly to obtain a suspension. Then the suspension was spray-dried at about 380℃ to obtain the precursor powder; finally, the above-mentioned precursor powder was placed in a tube furnace, and under nitrogen atmosphere at a temperature of about 1350℃, the carbonization reduction and nitridation reaction After 2 hours, a titanium carbonitride powder containing a grain growth inhibitor with an average grain size of less than 100 nm was prepared.
Example Embodiment
[0032] Example 3:
[0033] The nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) And nano-carbon black as raw materials, in which 70.23% of nano-titania, 0.97% of ammonium metavanadate, and 28.8% of nano-carbon black are calculated by weight percentage. Dissolve the above-mentioned raw materials in distilled water at about 40°C and stir evenly to obtain Then, the suspension was dried at a temperature of about 50°C for about 3 hours, and then heat treated at about 200°C for about 3 hours, and then quenched to obtain a precursor powder; finally, the precursor powder was obtained The powder is placed in an induction furnace and undergoes carbonization reduction and nitridation reactions at a temperature of about 1150°C under an ammonia atmosphere for about 3.5 hours to obtain titanium carbonitride powder containing a grain growth inhibitor with an average grain size of less than 100 nm.
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