A kind of preparation method of atomic crystal boron doped carbon material
A carbon material and boron doping technology, applied in chemical instruments and methods, nano-carbon, carbon compounds, etc., can solve problems such as inability to ensure uniform distribution of boron atoms, carbon structure defects, limited introduction methods, etc., to achieve fewer defects and better production The effect of short cycle time and adjustable boron content
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Embodiment 1
[0027] A method for preparing an atomic crystal boron-doped carbon material, comprising the steps of:
[0028] (1) Boron is introduced into the graphite crucible: first, 25% amorphous boron powder, 35% coal-based pitch, and 40% coke powder are kneaded, and the kneading temperature is 150 ° C. The kneaded material is cooled to room temperature, and then crushed to 90 μm , and then placed in the mold for steel molding, and then carbonized and pre-graphitized, the highest temperature is lower than 1800°C. Finally, the boron-containing graphite block is processed into a screw-sealable crucible;
[0029] (2) Fill the carbon dots in a boron-containing graphite crucible, seal the thread and place it in the constant temperature zone of the intermediate frequency graphitization furnace. Under the protection of high-purity argon, keep the constant pressure at 0.04MPa, and then pump the high-purity argon into it. The gas is circulated twice to ensure that all the air is discharged; then...
Embodiment 2
[0031] A method for preparing an atomic crystal boron-doped carbon material, comprising the steps of:
[0032] (1) Boron is introduced into the graphite crucible. The specific process is: first knead 10% nano-boron powder, 35% coal-based pitch, and 55% coke powder at a temperature of 160°C. Molded, then carbonized and pre-graphitized, the maximum temperature is lower than 2000 °C. Finally, the boron-containing graphite block is processed into a screw-sealable crucible;
[0033](2) Fill the graphene in the boron-containing graphite crucible, seal the thread and place it in the constant temperature zone of the intermediate frequency graphitization furnace. Under the protection of high-purity argon, keep the constant pressure at 0.1MPa, and then pump the high-purity argon into it. The gas is circulated twice to ensure that all the air is discharged; then the temperature is raised to 3000°C at 10°C / min, and the temperature is kept constant for 3 hours. After the constant tempera...
Embodiment 3
[0035] A method for preparing an atomic crystal boron-doped carbon material, comprising the steps of:
[0036] (1) Boron is introduced into the graphite crucible. The specific process is: first knead 20% boron carbide, 35% coal-based pitch, and 45% coke powder at a temperature of 170°C, cool the kneaded material to room temperature, then crush it to 150 μm, and then place it in a mold for isostatic pressing Forming, then carbonization and pre-graphitization, the maximum temperature is lower than 1900 °C. Finally, the boron-containing graphite block is processed into a screw-sealable crucible;
[0037] (2) Fill the carbon nanotubes in the boron-containing graphite crucible, seal the thread and place it in the constant temperature zone of the intermediate frequency graphitization furnace. The argon gas is circulated twice to ensure that all the air is discharged; then the temperature is raised to 2200°C at 5°C / min, and the temperature is kept constant for 1.0h. After the const...
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