Method for preparing nickel ferrite-based eutectic ceramic inert anode material

A method of preparing a nickel ferrite-based eutectic ceramic inert anode material, comprising:

• (1) mixing a mixture powder of a NiFe2O4-based spinel powder and a nickel oxide-based powder with a binder, followed by granulation to obtain a granular material with a size of 10-30 mesh;
• subjecting the granular material to compression molding under 100-200 MPa to obtain a green body;
• and pre-sintering the green body at 1,100-1,300° C. for 2-5 h in a first inert gas atmosphere to obtain a pre-sintered body;
• wherein the NiFe2O4-based spinel powder is 80-90% by weight of the mixture powder, and the nickel oxide-based powder is 10-20% by weight of the mixture powder;
• the binder is selected from the group consisting of polyvinyl alcohol, polyethylene glycol and a combination thereof;
• and the binder is 0.5-2% by weight of the mixture powder;
• (2) melting the pre-sintered body in a second inert gas atmosphere to obtain a molten material;
• cooling and solidifying the molten material at a rate of 1-100° C./min, or casting the molten material followed by cooling and solidification at a rate of 1-100° C./min to obtain a ceramic solidified body;
• and
• (3) processing the ceramic solidified body at 1250-1400° C. for 2-6 h, followed by cooling to room temperature at a rate of 1-50° C./min to obtain the nickel ferrate-based eutectic ceramic inert anode material.