Method for preparing superfine nickel carbonyl powder by nickel carbonyl thermal decomposition
A carbonyl nickel powder and carbonyl nickel heat technology, which is applied in the field of carbonyl nickel thermal decomposition to prepare ultra-fine carbonyl nickel powder, can solve the problems of increasing process complexity and production cost, affecting product particle size distribution and performance, and reducing hanging The effect of reducing wall phenomenon, reducing the formation of wall-hanging objects, and simplifying the preparation process
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Embodiment 1
[0014] Example 1: The outer wall of the decomposer is heated to 280°C, and the carbon monoxide preheating gas of 320°C is introduced, and the flow rate is 10L / min; Min carbon monoxide gas is mixed and enters the decomposer, so that the internal temperature of the decomposer is maintained between 270-280°C, and the nickel carbonyl is decomposed to form ultrafine nickel carbonyl powder with a particle size between 1-10 μm. During the whole decomposition process, the pressure of the decomposer is maintained at 0.02-0.2MPa. After the nickel carbonyl is decomposed, there is no obvious wall-hanging substance.
Embodiment 2
[0015] Example 2: Heat the outer wall of the decomposer to 260°C, feed 300°C carbon monoxide preheating gas at a flow rate of 20L / min; vaporize nickel carbonyl gas in the gas distribution tank at a rate of 5L / min with a flow rate of 12L / min The carbon monoxide gas is mixed into the decomposer, so that the internal temperature of the decomposer is maintained between 250-260°C, and the nickel carbonyl is decomposed to form ultrafine nickel carbonyl powder with a particle size between 100nm and 1μm. During the whole decomposition process, the pressure of the combiner is maintained at 0.02-0.2MPa. After the nickel carbonyl is decomposed, there is no obvious wall-hanging substance.
Embodiment 3
[0016] Embodiment 3: Decompose the temperature of the outer wall and heat it to 240°C, feed carbon monoxide preheating gas at 290°C, and its flow rate is 30L / min; vaporize nickel carbonyl gas in the gas distribution tank with a flow rate of 5L / min and a flow rate of 17L / min The carbon monoxide gas is mixed into the decomposer, and the internal temperature of the decomposer is maintained between 260-270°C, then the nickel carbonyl is decomposed to form ultrafine nickel carbonyl powder with a particle size of 50-100nm. During the whole decomposition process, the pressure of the decomposer is maintained between 0.02-0.2MPa. After the nickel carbonyl is decomposed, there is no obvious wall-hanging substance.
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