Process for preparing diamond nanopowder and diamond sheet by carbon black catalysis
A technology of nano-diamond powder and carbon black catalysis method is applied in the field of preparation of nano-diamond powder and diamond sheet, which can solve the problems of troublesome operation, low diamond conversion rate, complicated equipment of nano-diamond powder, etc., and achieves simple production method and operation saving. Time and device convenience
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Embodiment 1
[0012] Mix 20g of carbon black and 0.1g of nano-iron evenly, place the mixture in an open stainless steel container 3 and place it in a heating furnace 2, keep it at 300°C for 100 minutes, seal the stainless steel container 4, and turn on the superconducting strong magnetic field device 1 power supply and make its magnetic field strength reach 10 tesla, and at the same time keep the heating furnace at 1000°C for 100 minutes, then turn off the power supply of superconducting strong magnetic field device 1 and heating furnace 2, so that the stainless steel container 3 and raw material mixture 4 follow the heating furnace 2 Cool to room temperature, take out the black powder in the stainless steel container, wash with dilute sulfuric acid and perchloric acid to remove Fe elements and non-diamond carbon, and then rinse with distilled water; after drying at 110°C, the obtained powder sample is nano Diamond powder, said to weigh about 7 grams. The grain size of the nano-diamond powd...
Embodiment 2
[0014] Mix 20g of carbon black and 0.05g of nano-iron evenly, place the mixture in an open stainless steel container 3 and place it in a heating furnace 2, keep it at 300°C for 100min, seal the stainless steel container 4, and set the heating furnace at 1050°C After being kept warm for 30min, turn off the power supply of the heating furnace 2, make the stainless steel container 3 and the raw material mixture 4 cool to room temperature with the heating furnace 2, take out the black powder in the stainless steel container, wash with dilute sulfuric acid and perchloric acid, and remove Fe elements and non-ferrous metals. The diamond carbon is rinsed with distilled water; after drying at 110° C., the obtained powder sample is nano-diamond powder, and its weight is about 5 grams. The grain size of the nano-diamond powder is detected to be 20nm, and after ultrasonic separation of the obtained powder, a nano-structured diamond sheet with an area of 5mm×5mm and a thickness of 300-800...
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