Method for preparing graphene by continuously bombarding through electron beams
An electron beam and graphene technology, which is applied in the field of graphene material preparation, can solve the problems of graphene performance degradation and other problems, and achieve the effect of overcoming lattice damage, high quality, and avoiding lattice damage
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Embodiment 1
[0030] Put the flake graphite raw material with a particle size of 10 microns into the continuous screw extruder, set the temperature of the continuous screw reaction extruder to 60°C, and the extrusion pressure to 25 MPa to obtain a finer solid product as graphite fine powder, which is washed and crushed into graphite powder , put the graphite powder into the HF solution with a concentration of 3.5%, ultrasonication for 0.8 minutes, remove impurities on the graphite surface, and finally rinse with deionized water to remove the residual HF liquid, dry the graphite powder raw material under the protection of argon at 80 °C, and heat Pressing and sintering technology hot-presses graphite powder at 900°C and 2.3MPa pressure to obtain a 30*30 cm 2 The large-area graphite plate is pressed into a large-area graphite plate;
[0031] Using LiB 6 Excited electrons are generated, and after 100KV high-voltage acceleration, electron beams are obtained. In the direction in the plane of th...
Embodiment 2
[0034] Put the graphite oxide raw material with a particle size of 0.5 microns into the continuous screw extruder, set the temperature of the continuous screw reaction extruder to 150°C, and the extrusion pressure to 40 MPa to obtain a finer solid product as graphite fine powder, which is washed and crushed into graphite powder , put the graphite powder into the 5% HF solution, ultrasonically for 0.5 minutes to remove impurities on the graphite surface, and finally rinse with deionized water to remove the residual HF liquid, dry the graphite powder raw material under the protection of argon at 85°C, and heat Pressing and sintering technology hot presses graphite powder at 920°C and 3.3MPa to obtain a 50*50 cm 2 The large-area graphite plate is pressed into a large-area graphite plate;
[0035] Using LiB 6 Excited electrons are generated, and after 300KV high-voltage acceleration, electron beams are obtained. In the direction in the plane of the graphite plate, along the side of...
Embodiment 3
[0038] Put the raw material of expanded graphite with a particle size of 2 microns into the continuous screw extruder, set the temperature of the continuous screw reaction extruder to 250°C, and the extrusion pressure to 30 MPa to obtain a finer solid product as graphite fine powder, which is washed and crushed into graphite powder , put the graphite powder into the HF solution with a concentration of 4.5%, ultrasonically for 0.5 minutes to remove impurities on the graphite surface, and finally rinse with deionized water to remove the residual HF liquid, dry the raw graphite powder under the protection of argon at 88°C, and heat Pressing and sintering technology hot presses graphite powder at 980°C and 4.0MPa pressure to obtain a 40*40 cm 2 The large-area graphite plate is pressed into a large-area graphite plate;
[0039] Using LiB 6 Excited electrons are generated, and after 250KV high-voltage acceleration, electron beams are obtained. In the direction in the plane of the g...
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