A preparation method for doping rare earth element tricobalt tetroxide
A technology of tricobalt tetroxide and rare earth elements, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of unfavorable industrial production and cumbersome process, and achieve the effects of stabilizing growth, increasing the number of crystal nuclei, and inhibiting growth
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Embodiment 1
[0052] A method for preparing large-grained rare-earth element cobalt tetroxide, specifically comprising the following steps:
[0053] Step (a), dosing
[0054] The configured A solution is 10m 3 Cobalt concentration is 20g / L cobalt nitrate solution, lanthanum concentration is 0.11g / L lanthanum nitrate mixed solution; the prepared B solution is 15m 3 Cobalt nitrate solution with a cobalt concentration of 160g / L, and a mixed solution of lanthanum nitrate with a lanthanum concentration of 0.88g / L; preparation of solution C: a mixed solution of sodium hydroxide solution and ammonia solution containing hydrazine hydrate, that is: the concentration of ammonia solution is 180g / L, add 5mL hydrazine hydrate solution with a mass concentration of 80% per liter of ammonia solution, and then mix it with a sodium hydroxide solution with a concentration of 200g / L in a volume ratio of 0.1:1.
[0055] Step (b), synthesis reaction
[0056] At the beginning of the synthesis reaction, add ...
Embodiment 2
[0064] A method for preparing large-grained rare-earth element cobalt tetroxide, specifically comprising the following steps:
[0065] Step (a), dosing
[0066] The configured A solution is 10m 3 Cobalt concentration is 30g / L cobalt sulfate solution, cerium concentration is 0.21g / L cerium nitrate mixed solution; The prepared B solution is 15m 3 A cobalt sulfate solution with a cobalt concentration of 150g / L, and a mixed solution of cerium nitrate with a cerium concentration of 1.04g / L; prepare solution C: a mixture of sodium hydroxide solution and ammonia solution containing hydrazine hydrate, that is, the concentration of the ammonia solution is 180g / L, add 15mL of hydrazine hydrate solution with a mass concentration of 80% per liter of ammonia solution, and then mix it with a sodium hydroxide solution with a concentration of 250g / L at a volume ratio of 0.15:1.
[0067] Step (b), synthesis reaction
[0068] At the beginning of the synthesis reaction, add the B solution ...
Embodiment 3
[0076] A method for preparing large-grained rare-earth element cobalt tetroxide, specifically comprising the following steps:
[0077] Step (a), dosing
[0078] The configured A solution is 10m 3 The cobalt concentration is 40g / L cobalt chloride solution, the yttrium nitrate mixed solution that yttrium concentration is 0.33g / L; The prepared B solution is 15m 3 The cobalt chloride solution that the cobalt concentration is 140g / L, the yttrium nitrate mixed solution that the yttrium concentration is 1.16g / L; Preparation C solution: be the mixed solution of sodium hydroxide solution and ammonia solution containing hydrazine hydrate, that is: the concentration of ammonia solution is 180g / L, add 20mL hydrazine hydrate solution with a mass concentration of 80% per liter of ammonia solution, and then mix it with a sodium hydroxide solution with a concentration of 300g / L at a volume ratio of 0.2:1.
[0079] Step (b), synthesis reaction
[0080] At the beginning of the synthesis re...
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