Spherical tricobalt tetraoxide and method of preparing the same
AssigneeNingbo Jinhe New Materials Co., Ltd.
InventorJinhua HE
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Abstract
A method of preparation of spherical tricobalt tetraoxide, including at least oxidizing a bivalent cobalt salt in a wet environment and in the presence of a precipitant, a complexing agent, and an oxidant to yield spherical cobalt oxyhydroxide.cobalt hydroxide according to the following equation Co2++3OH−+O→CoOOH.Co(OH)2; oxidizing the spherical hydroxy cobalt oxyhydroxide.cobalt hydroxide to yield spherical tricobalt tetraoxide according to the following equation 6 CoOOH.Co(OH)2+O→4 Co3O4+9 H2O; and roasting the spherical tricobalt tetraoxide at low or intermediate temperature to yield a black powder. The method is easily practiced and suitable for mass production, and the resultant spherical tricobalt tetraoxide has stable structure, reliable properties, and high activity.
Claims7
A method of preparation of spherical tricobalt tetraoxide, comprising, oxidizing a bivalent cobalt salt in a wet environment and in the presence of a precipitant, a complexing agent, and an oxidant to yield spherical cobalt oxyhydroxide.cobalt hydroxide according to the following equation Co2++3OH−+O→CoOOH.Co(OH)2;
- oxidizing the spherical cobalt oxyhydroxide.cobalt hydroxide to yield spherical tricobalt tetraoxide according to the following equation 6 CoOOH.Co(OH)2+O→4 Co3O4+9 H2O;
- and roasting the spherical tricobalt tetraoxide at low or intermediate temperature to yield spherical tricobalt tetraoxide as a black powder.
A spherical tricobalt tetraoxide prepared from a cobalt salt solution by complexing, precipitating, oxidating, washing, drying, and roasting, wherein the cobalt content of said spherical tricobalt tetraoxide is between 72.0 and 74.0%, the diameter thereof D50 is between 2 and 15 μm, and the tap density thereof is between 1.6 and 3.5 g/cm3.
Dependencies are inferred from the claim text.