Preparation method for superparamagnetism ferrite nano particles
A nanoparticle and superparamagnetic technology, which is applied in the field of nanomaterials, can solve the problems of high energy consumption, uneven particle size distribution, and low purity of nanoparticles in the production process, and achieve high energy efficiency, high saturation magnetization, and high product quality. good performance
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[0030] Example 1:
[0031] (a) Weigh 0.4g NaOH and dissolve in 1mL H 2 O, and then mixed with 6mL oleic acid, 3mL absolute ethanol in the process of stirring to obtain a homogeneous transparent solution A.
[0032] (b) Add 50 μL of 80% hydrazine hydrate to solution A, and continue to stir for 5 minutes to obtain homogeneous solution B.
[0033] (c) Prepare 0.5 mM ferrous ammonium sulfate aqueous solution C and 0.25 mM ferrous sulfate aqueous solution D for use.
[0034] (d) Add 1 mL of C solution and 1 mL of D solution to solution B in turn, stir and mix quickly to obtain solution E.
[0035] (e) Transfer solution E to the quartz reaction tube matched with the microwave synthesizer, seal it with the matched rubber stopper, put it into the microwave synthesizer, and set the microwave synthesis parameters: power 40W, hold temperature 160℃, hold time 5min. Start the program and perform microwave synthesis.
[0036] (f) After the reaction has stopped, take out the reaction tube, add 10 mL o...
Example Embodiment
[0042] Example 2:
[0043] (a) Weigh 0.4g NaOH and dissolve in 1mL H 2 O, and then mixed with 6mL oleic acid, 3mL absolute ethanol in the process of stirring to obtain a homogeneous transparent solution A.
[0044] (b) Add 50 μL of 80% hydrazine hydrate to solution A, and continue to stir for 5 minutes to obtain homogeneous solution B.
[0045] (c) Prepare 0.5 mM ferric chloride aqueous solution C and 0.25 mM manganese acetate aqueous solution D for use.
[0046] (d) Add 1mL C solution and 1mL D solution to solution B in sequence, stir and mix evenly to obtain solution E.
[0047] (e) Transfer solution E to the quartz reaction tube matched with the microwave synthesizer, seal it with the matched rubber stopper, put it into the microwave synthesizer, and set the microwave synthesis parameters: power 40W, hold temperature 160℃, hold time 1min. Start the program and perform microwave synthesis.
[0048] (f) After the reaction has stopped, take out the reaction tube, add 10 mL of absolute e...
Example Embodiment
[0052] Example 3:
[0053] (a) Weigh 0.4g NaOH and dissolve in 1mL H 2 O, and then mixed with 6mL oleic acid, 3mL absolute ethanol in the process of stirring to obtain a homogeneous transparent solution A.
[0054] (b) Add 100 μL of 80% hydrazine hydrate to solution A, and continue to stir for 5 minutes to obtain homogeneous solution B.
[0055] (c) Prepare 0.25 mM ferric ammonium sulfate aqueous solution C and 0.125 mM cobalt acetate aqueous solution D for use.
[0056] (d) Add 1mL C solution and 1mL D solution to solution B in sequence, stir and mix evenly to obtain solution E.
[0057] (e) Transfer solution E to the quartz reaction tube matched with the microwave synthesizer, seal it with the matched rubber stopper, put it into the microwave synthesizer, and set the microwave synthesis parameters: power 20W, hold temperature 120°C, hold time 5min. Start the program and perform microwave synthesis.
[0058] (f) After the reaction has stopped, take out the reaction tube, add 10 mL of a...
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