Preparation method of all-wet nano NiFe2O4-NiO-Cu-Ni metal ceramic inert anode
A nife2o4-nio-cu-ni, cermet technology, applied in the field of powder metallurgy and molten salt electrolytic aluminum anode materials, can solve the problem of non-wetting of metals and ceramics, isolated distribution and uneven distribution, difficult processing and other problems. Large-scale and other problems, to achieve the effect of reducing activity, increasing density, and reducing static corrosion rate
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[0019] Fully wetted nano-NiFe of the present invention 2 o 4 -The preparation method of NiO-Cu-Ni cermet inert anode comprises the following steps:
[0020] A. Preparation of precursor ceramic powder: Fe 2 o 3 and NiO or Ni 2 o 3 The mixture (namely "Fe 2 o 3 and NiO" or "Fe 2 o 3 and Ni 2 o 3 mixture"), adding water, wet ball milling, drying, and then placing it in a sintering furnace for calcination, controlling the calcination temperature to prepare NiFe 2 o 4 -NiO precursor ceramic powder;
[0021] B. Preparation of mixed nano-powder: use the ceramic powder prepared in step A as one of the raw materials, add Cu powder and Ni powder for mixing, and add a small amount of Ti powder and MnO 2 , V 2 o 5 , MgO and CaO and other mixtures of one or more substances, etc., adding one or more mixtures of water, absolute ethanol or polyvinylpyrrolidone for secondary planetary ball milling, drying, and ball milling to obtain Contains NiFe 2 o 4 -NiO-Cu-Ni mixed nanopo...
Embodiment 1
[0030]Weigh industrial-grade iron oxide powder and nickelous oxide in a weight ratio of 1:1, add 65% water, and use a ball mill to grind for 6 hours. The obtained slurry is dried at 100°C for 24 hours, and then calcined at 1100°C to obtain NiO Excess 10% NiFe 2 o 4 Powder. NiFe 2 o 4 -10%NiO powder is one of the raw materials, add chemically pure 14%Cu powder, 3%Ni powder in proportion; trace dopant 0.5%Ti powder, 1%MnO 2 Powder, 1.5%V 2 o 5 powder, 1% MgO powder and 1% CaO powder, then add 60% absolute ethanol and 1% PVP in mass fraction, ball mill for 12 hours, the obtained mixed slurry is evaporated to recover absolute ethanol, and dried at 80°C for 12 hours , the obtained material was pulverized to prepare a mixed nano-powder with an average particle size of 43.7 nm. Put the prepared nano-powder into a bag with good plasticity and high strength, vibrate or compact it to form the desired shape, preliminarily determine the size, vacuumize the blank to remove the gas i...
Embodiment 2
[0033] Weigh industrial-grade iron oxide powder and nickel oxide powder at a weight ratio of 1:1.5, add 65% water, and use a ball mill to mix and grind for 6 hours. The obtained slurry is dried at 100°C for 24 hours, crushed and calcined at 1200°C to obtain NiO Excess 15% NiFe 2 o 4 Powder. NiFe 2 o 4 -15%NiO powder is one of the raw materials, add chemically pure 10%Cu powder, 2%Ni powder in proportion; trace dopant 0.5%Ti powder, 0.5%MnO 2 Powder, 2%V 2 o 5 powder, 1.2% MgO powder and 0.8% CaO powder, then add 60% absolute ethanol and 1% PVP in mass fraction, ball mill for 12 hours, the obtained mixed slurry is evaporated to recover absolute ethanol, and dried at 80°C for 12 hours , the obtained material was pulverized to prepare a mixed nano-powder with an average particle size of 43.7 nm. Put the prepared nano-powder into a bag with good plasticity and high strength, vibrate or compact it to form the desired shape, preliminarily determine the size, vacuumize the bla...
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