a cacl based 2 Preparation method of nano-silicon carbide particles of shape regulator
A technology of nano-silicon carbide and regulator, applied in the direction of silicon carbide, chemical instruments and methods, carbide, etc., can solve the problems of uneven particle size, complicated process, low yield, etc., and achieve uniform particle size distribution and simple preparation process , the effect of high product purity
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specific Embodiment approach 1
[0015] Specific implementation mode 1: In this implementation mode, a CaCl-based 2 The preparation method of the nano-silicon carbide particle of shape regulator, it realizes according to the following steps:
[0016] 1. Preparation of silicon precursor powder:
[0017] stirring and dissolving the calcium chloride solid in the silica sol liquid, and then drying at 60-100°C for 30-50 minutes to obtain silicon precursor powder;
[0018] 2. Mix the silicon precursor powder and carbon source obtained in step 1 in a high-speed mixer, take it out and put it in a graphite crucible, put it in a high-temperature sintering furnace under the protection of argon, and raise the temperature to 850-1900°C React for 1-9 hours, then cool to room temperature to obtain the pre-product;
[0019] 3. The pre-product obtained in step 2 is washed 1 to 3 times with an ethanol solution with a mass concentration of 20 to 30%, and then washed with distilled water for 1 to 3 times. After taking it out, ...
specific Embodiment approach 2
[0024] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the mass ratio of calcium chloride solid and silica sol liquid described in step one is 1:(10~50); the mode of described stirring is magnetic stirring . Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the carbon source in step 2 is carbon black, activated carbon, carbonized lignin or carbonized fiber. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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