Method for preparing micro-nano titanium carbonitride powder with controllable carbon-nitrogen ratio by adopting solid state nitrogen source
A technology of titanium carbonitride and carbon-nitrogen ratio, which is applied in the field of ceramic material preparation, can solve the problems of difficult and accurate control of C/N, high reaction temperature, and low production efficiency, and achieve precise and controllable carbon-nitrogen ratio and low preparation temperature , low cost effect
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Embodiment 1
[0031] Embodiment 1: Preparation of TiC 0.9 N 0.1 Ceramic powder
[0032] The raw materials are commercial titanium powder with a particle size of 200 mesh, carbon black and ammonium chloride, and the molar ratio is 1:0.9:0.1. The ingredients are 30 grams in total, 30 grams of NaCl are added, and after mixing, they are put into a stainless steel ball mill tank of a ball mill, and the steel tank is used After the rubber ring is sealed, vacuumize to 0.5Pa, fill with argon, and the pressure is 0.9atm. Then evacuate to 0.5Pa, and then fill with argon, the pressure is 0.9atm. Control the ball-to-material ratio to 10:1, and control the speed of the ball mill to 300 rpm. After ball milling for 6 hours, use a tablet machine to make a φ20mm green body under an axial pressure of 4MPa, and put the green body at 900°C in molten NaCl for 30 minutes. Put the salt block with Ti(C,N) ceramic powder cooled down after the reaction into water 10 times the weight of the salt block, and soak f...
Embodiment 2
[0033] Embodiment 2: Preparation of TiC 0.8 N 0.2 Ceramic powder
[0034] The raw materials are commercial titanium powder with a particle size of 200 mesh, carbon black and ammonium chloride. The molar ratio is 1:0.8:0.2. The ingredients are 30 grams in total. After the rubber ring is sealed, vacuumize to 1.0Pa, fill with argon, and the pressure is 1atm. Then evacuate to 1.0Pa, and then fill with argon, the pressure is 1atm. Control the ball-to-material ratio to 20:1, and control the speed of the ball mill to 200 rpm. After ball milling for 5 hours, use a tablet machine to make a φ20mm green body under an axial pressure of 5MPa, and put the green body at 1000°C in molten NaCl for 30 minutes. Put the salt block with Ti(C,N) ceramic powder cooled down after the reaction into water 10 times the weight of the salt block, and soak for 10 hours. After NaCl is completely dissolved in water. Filter out the Ti(C, N) ceramic powder, rinse and dry the Ti(C, N) ceramic powder repea...
Embodiment 3
[0035] Embodiment 3: Preparation of TiC 0.7 N 0.3 Ceramic powder
[0036]The raw materials are commercial titanium powder with a particle size of 200 mesh, carbon black and ammonium chloride, and the molar ratio is 1:0.7:0.3. The ingredients are 30 grams in total, 30 grams of NaCl are added, and after mixing, they are put into a stainless steel ball mill tank of a ball mill, and the steel tank is used After the rubber ring is sealed, vacuumize to 1.0Pa, fill with argon, and the pressure is 1.1atm. Then evacuate to 1.0Pa, and then fill with argon, the pressure is 1.1atm. Control the ball-to-material ratio to 20:1, and control the speed of the ball mill to 150 rpm. After ball milling for 8 hours, use a tablet press to make a green body with a diameter of 20 mm under an axial pressure of 4 MPa, and put the green body at 800 ° C. in molten NaCl for 30 minutes. Put the salt block with Ti(C,N) ceramic powder cooled down after the reaction into water 10 times the weight of the sa...
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