Solid phase interface induced precipitation method for preparing nickel oxide, cobalt oxide powder
A solid-phase interface, nickel oxide technology, applied in nickel oxide/nickel hydroxide, cobalt oxide/cobalt hydroxide and other directions, can solve the problems of coarse product particle size, difficult to achieve distribution, large solution volume, etc., and achieve fine product particle size, Easy operation and simple process effect
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Embodiment 1
[0014] Take 1.0mol / L NiCl 2 Add 1.0 g of PVP dispersant to 500 mL of the solution, stir and mix evenly, adjust the pH of the solution to 4.5 with hydrochloric acid, and heat to 45°C; weigh 80.0 g of oxalic acid solid that has been broken and passed through 100 mesh, and add NiCl in three equal amounts 2 In the solution, each feed interval is 3 minutes, and the pH of the mixed solution is about 1.5. After the feeding was completed, the aging was continued for 0.5 hour; the stirring speed was controlled at 300 rpm during the feeding and aging process. After aging, filter and wash the powder with hot water until no anions can be detected in the washing liquid. After drying, 74.5g of nickel oxalate powder was obtained. The test and analysis results showed that the powder had a crystal structure, the particle size of the powder was between 0.5 and 20 μm, the average particle size was about 5 μm, and the microscopic shape was spherical or quasi-spherical.
[0015] The above nickel...
Embodiment 2
[0017] Take 1.0mol / L NiCl 2 Solution 500mL, add 1.0 g of OP dispersant, stir and mix evenly, adjust the pH of the solution to 4.5 with hydrochloric acid, and heat to 50°C; weigh 76.0 g of oxalic acid solid that has been broken and passed through 100 mesh, and add NiCl at one time 2 solution, the pH of the mixed solution is about 1.5 at this time. After the feeding was completed, the aging was continued for 0.5 hour; the stirring speed was controlled at 300 rpm during the feeding and aging process. After aging, filter and wash the powder with hot water until no anions can be detected in the washing liquid. After drying, 78.0 g of nickel oxalate powder was obtained. The test and analysis results showed that the powder had a crystal structure, the powder particle size was between 0.5 and 20 μm, the average particle size was about 3.5 μm, and the microscopic shape was spherical or quasi-spherical.
[0018] The above-mentioned nickel oxalate powder was calcined in an air atmosphe...
Embodiment 3
[0020] Take 1.5mol / L Ni(NO 3 ) 2 Solution 500mL, add 2.0 grams of OP dispersant, stir and mix evenly, and adjust the pH of the solution to 4.5 with nitric acid, and heat to 55°C; weigh 112.0 grams of ammonium oxalate solid that has been broken and passed 100 meshes, and add Ni(NO 3 ) 2 solution, the pH of the mixed solution at this time is about 1.0. After the feeding was completed, the aging was continued for 0.5 hour; the stirring speed was controlled at 200 rpm during the feeding and aging process. After aging, filter and wash the powder with hot water until the washing liquid is neutral. After drying, 115.5 g of nickel oxalate powder was obtained. The test and analysis results showed that the powder had a crystal structure, the powder particle size was between 0.5 and 20 μm, the average particle size was about 2.5 μm, and the microscopic shape was spherical or quasi-spherical.
[0021] The above-mentioned nickel oxalate powder was calcined in an air atmosphere at a tem...
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