Production method of spherical submicron cobalt powder
A micron cobalt powder, submicron technology, applied in the field of preparation of spherical submicron cobalt powder
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[0026] see figure 1 , the invention discloses a preparation method of spherical submicron cobalt powder, comprising steps:
[0027] The step of making the complexed cobalt salt solution: dissolving the cobalt salt and the surfactant in water and stirring evenly, adding a complexing agent into the cobalt salt solution for mixing and reacting;
[0028] The steps of making the reducing agent solvent: dissolving the reducing agent in water;
[0029] Heating the complexed cobalt salt solution, adding alkali to the complexed cobalt salt solution to make it alkaline; then mixing the reducing agent solvent with the complexed cobalt salt solution, and obtaining a submicron cobalt powder filter cake through solid-liquid separation, which is washed and removed Impurities in the filter cake; the washed filter cake is washed with absolute ethanol to remove water; the submicron cobalt powder filter cake washed with absolute ethanol is vacuum dried to remove ethanol and trace moisture to o...
Embodiment 1
[0041] A preparation method of submicron cobalt powder, comprising:
[0042] 0.225 mol CoCl 2 Dissolve 4.5g of PVP in water and mix evenly, then add 0.135mol ammonia water and stir well to obtain 450ml complex cobalt salt solution; mix 0.43molN 2 h 4 ·H 2 O and 0.02 mol sodium borohydride are miscible in water to obtain 450ml reducing agent solvent;
[0043] Heat the complexed cobalt salt solution to 80°C, adjust the pH value of the complexed cobalt salt solution to 12.0 with 6.0mol / L sodium hydroxide solution, and then add the reducing agent solvent into the complexed cobalt salt solution for 30 minutes. The temperature of the reaction system was maintained at 80°C for 40 minutes, and then cold water was added to cool to room temperature (10-30°C); the reaction product was centrifuged, the filter cake was washed with water to remove impurities in the filter cake, and the waste water was treated centrally; The cake is washed with absolute ethanol to remove water, and the a...
Embodiment 2
[0045] A preparation method of submicron cobalt powder, comprising:
[0046] 0.35 mol CoSO 4 Dissolve 7.0g of PVA in water and mix evenly, then add 0.175mol ethylenediamine and stir thoroughly to obtain 350ml complex cobalt salt solution; mix 1.65molN 2 h 4 ·H 2 0.01 mol potassium borohydride is miscible in water to obtain 550ml reducing agent solvent;
[0047] Heat the complexed cobalt salt solution to 60°C, adjust the pH value of the complexed cobalt salt solution to 11.5 with 2.0mol / L potassium hydroxide solution, then add the reducing agent solvent into the complexed cobalt salt solution, and the feeding time is 50min , the temperature of the reaction system was maintained at 60°C for 50 minutes, and then cold water was added to cool to room temperature (10-30°C); the reaction product was centrifuged, the filter cake was washed with water to remove impurities in the filter cake, and the waste water was treated centrally; The filter cake is washed with absolute ethanol ...
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Abstract
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