Metallic nickel powder and method for producing metallic nickel powder
A manufacturing method, a technology of metallic nickel, applied in the field of manufacturing nickel metallic powder and metallic nickel powder
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Embodiment 1
[0089] (Si minimum, Ni(OH) minimum)
[0090] Metal nickel powder was produced by the same method as described in Example 1 of Japanese Patent No. 4286220. In addition, prior to the production of the metal nickel powder, the following pure waters having different silicon concentrations were prepared.
[0091] Pure water A: silicon concentration 65wtppm
[0092] Pure water B: Pure water A was treated with a filter device (multi-purpose filter plate with tank type (manufactured by Advantec Toyo Co., Ltd.)) equipped with a filter having a surface charge with a zeta potential of (+) . The silicon concentration was 3 wtppm.
[0093] exist Figure 5 The chlorination furnace 1 of the production apparatus of the metal nickel powder shown is filled with metal nickel M with an average particle diameter of 5 mm, and the temperature of the atmosphere in the furnace is set to 1100° C. by a heating device 11 . Next, chlorine gas is supplied from the nozzle 12 into the chlorination furn...
Embodiment 2
[0100] Using pure water with a silicon concentration of 5 wtppm instead of pure water B with a silicon concentration of 3 wtppm, and making the heat treatment after drying a treatment at 250° C. for 30 minutes instead of a treatment at 200° C. for 30 minutes, in addition, the same as In Example 1, metallic nickel powder was obtained in the same manner. In addition, the silicon concentration of pure water was adjusted by mixing pure water A and pure water B.
[0101] Table 1 shows the 1200cm of metallic nickel powder -1 ~900cm -1 The S / N ratio of the absorption spectrum signal (X), 3700cm -1 ~3600cm -1 The S / N ratio (Y) of the absorption spectrum signal and the evaluation results of aggregation.
Embodiment 3
[0103] Metal nickel powder was obtained in the same manner as in Example 1 except that the heat treatment after drying was performed at 150° C. for 30 minutes instead of at 200° C. for 30 minutes. In addition, the silicon concentration of pure water was adjusted by mixing pure water A and pure water B.
[0104] Table 1 shows the 1200cm of metallic nickel powder -1 ~900cm -1 The S / N ratio of the absorption spectrum signal (X), 3700cm -1 ~3600cm -1 The S / N ratio (Y) of the absorption spectrum signal and the evaluation results of aggregation.
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