Method for preparing carbon hollow ball with magnetic material filler
A carbon hollow sphere, magnetic material technology, applied in ferrous oxides, iron oxide/iron hydroxide and other directions, can solve the problems of high raw material toxicity, low yield, poor corrosion resistance and wear resistance, etc., to achieve excellent Biocompatibility, simple preparation process and good repeatability
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specific Embodiment approach 1
[0019] Specific embodiment one: the steps of this embodiment method are as follows:
[0020] Step 1, select ferrocene and ammonium chloride as raw materials, ferrocene is 50%~80% by mass percentage, ammonium chloride is 20%~50%;
[0021] Step 2. Mix and prepare the raw materials in step 1 evenly, put them into a polyurethane-lined grinding tank or a plastic cylinder, add ceramic balls or agate balls, and dry mix them on a ball mill for 2 to 12 hours;
[0022] Step 3. Put the uniform powder mixed and ball-milled in step 2 into a pressure reaction furnace for reaction. The protective atmosphere is argon or nitrogen. The temperature is controlled at 550-700°C, and the holding time is 0.5-4.0 hours; during this process, the iron produced by ferrocene cracking reacts with ammonium chloride to form iron ammonium complex as a liquid spherical template, and the surface adsorbs ferrocene cracking The generated carbon atoms generate carbon hollow spheres filled with ferric ammonium com...
specific Embodiment approach 2
[0026] Specific embodiment two: the steps of this embodiment method are as follows:
[0027] Step 1, select ferrocene and ammonium chloride as raw materials, ferrocene is 50%~80% by mass percentage, ammonium chloride is 20%~50%;
[0028] Step 2. Mix and prepare the raw materials in step 1 evenly, put them into a polyurethane-lined grinding tank or a plastic cylinder, add ceramic balls or agate balls, and dry mix them on a ball mill for 2 to 12 hours;
[0029] Step 3. Put the uniform powder mixed and ball-milled in step 2 into a pressure reaction furnace for reaction. The protective atmosphere is argon or nitrogen. The temperature is controlled at 550-700°C, and the holding time is 0.5-4.0 hours; during this process, the iron produced by ferrocene cracking reacts with ammonium chloride to form iron ammonium complex as a liquid spherical template, and the surface adsorbs ferrocene cracking The generated carbon atoms generate carbon hollow spheres filled with ferric ammonium com...
specific Embodiment approach 3
[0033] Specific embodiment three: the difference between this embodiment and embodiment one is that step one, ferrocene and ammonium chloride are mixed by mass ratio 4: 3, a total of 70 grams, step two, put in polyurethane lining grinding tank Or in a plastic cylinder, add ceramic balls or agate balls as grinding balls for dry mixing, the mixing time is 2 hours; step 3, put the evenly mixed powder directly in the pressure furnace, fill it with argon to 1.9MPa, and then Raise the temperature at a rate of 30°C to 550°C, at this time the gas pressure is 2.6MPa, and keep warm for 4 hours; cool with the furnace, step 4, put the obtained black powder into deionized water under air atmosphere and stir for 1 hour; step 5, Put the black powder obtained after the hydrolysis treatment in a tube furnace, raise the temperature to 500° C. at a rate of 10° C. per minute under an argon flow of 50 sccm, and keep it warm for 1 hour; step 6, put the black powder obtained after the heat treatment ...
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