A microporous channel type molten salt corrosion resistant boride/diamond composite material and its preparation method
A technology of microporous channels and composite materials, applied in the field of materials, can solve problems that have not yet been seen, and achieve the effects of avoiding corrosion and penetration, improving current efficiency, and good conductivity
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Embodiment 1
[0024] (1) The matrix is cleaned up, placed in a 0.1wt% cetyl sodium sulphate aqueous solution for ultrasonic treatment for 30 minutes, then cleaned with deionized water, and then placed in a 0.5wt% diamond nanocrystal suspension Incubate for 5 minutes, take out after evenly adsorbing nanoparticles, and blow dry with nitrogen;
[0025] (2) The substrate obtained in the previous step is pretreated with plasma hydrogen based on the chemical vapor deposition chamber, and the process parameters are as follows: the temperature is 850°C, and the treatment time is less than 5 minutes. The gas is hydrogen, the flow rate is 100slpm, and the air pressure is 1×10 3 pa, the concentration of atomic hydrogen is 9×10 15 cm 3- .
[0026] (3) The temperature is lowered to 750°C, and then a mixed gas of methane, oxygen, hydrogen and borane is introduced to start chemical vapor deposition of the diamond film. The pressure in the chamber is 5×10 3 pa, the gas source is a flow rate of 200 sl...
Embodiment 2
[0030] Weigh 600 grams of inorganic salt CaCl 2 , put 291 grams of NaCl into a graphite crucible, remove water at 300°C for 48 hours, then add dry tantalum oxide powder, mix evenly, place the crucible in an electrolytic reactor, pass high-purity argon protection, and heat up to 880°C to make the inorganic salt Melt it completely, then keep the furnace temperature at 850°C, take the material prepared in Example 1 as the cathode, apply a constant cell pressure of 2.2V between it and the graphite anode, and perform electrolysis for 2 hours to obtain metal tantalum. After the electrolysis, the cathode was soaked in deionized water and ultrasonically treated to remove the electrolytic products on the surface. It was observed that the material had no corrosion. Under the same conditions, conventional carbon materials are used as cathodes for electrolysis, and the cell voltage needs to be increased to 2.6V.
Embodiment 3
[0032] Weigh 750g NaCl, 5g WO 3 , 150 g Na 2 WO 4 Mix evenly and put it into a graphite crucible. After removing water at 300°C for 48 hours, place the crucible in the electrolytic reactor, pass through high-purity argon for protection, raise the temperature to 800°C to completely melt the inorganic salt, and then keep the furnace temperature at 800°C. Take the example The material prepared in 1 was used as the cathode, and the current density was maintained at 300mA / cm 2 , electrolysis for 2 hours, you can get metal tungsten. After the electrolysis, the cathode was soaked in deionized water and ultrasonically treated to remove the electrolytic products on the surface. It was observed that the material had no corrosion. Compared with conventional carbon material cathodes, the current efficiency is increased by 20%.
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