Ball-milling and mixing preparation process and use method for permanent magnetic ferrite

Abstract

The invention discloses a ball-milling and mixing preparation process for permanent magnetic ferrite. The preparation process comprises the following specific preparation steps: step a, stirring and mixing barium carbonate and iron oxide red according to a certain molar ratio in a conical mixer by utilizing a stirring arm, adding 0.3%-0.8% of mixed silicon dioxide again, and carrying out pre-sintering in a four-hole push plate kiln after mixing to form a permanent magnetic ferrite pre-sintered material; b, adding the permanent magnetic ferrite pre-sintered material, first-stage steel balls andwater into a ball mill according to a weight ratio of (0.6-2): (4-8): (1-1.6), carrying out mixing, and then carrying out ball milling for 3-4 hours; c, transferring the ball-milled materials in thestep b into second-stage ball milling through compressed air, wherein a ratio of the materials to second-stage steel balls to water is (0.6-2): (4-8): (1-1.6); d, filtering ball-milled slurry, and putting the filtered slurry into a natural precipitation tower for precipitation; and step e, molding the precipitated slurry. The permanent magnetic ferrite is sintered by utilizing a segmented ball-milling and equal-ball-diameter grinding process and an optimized molding process, so the performance of the permanent magnetic ferrite is excellent, and production cost is reduced.

Description

technical field [0001] The invention relates to a preparation process of a permanent magnet ferrite ball mill mixture and a method for using the same, belonging to the technical field of permanent magnet ferrite. Background technique [0002] Hydromagnetic ferrite is hexagonal ferrite or M type ferrite. The general chemical formula of hexagonal ferrite is MeFe 12 o 19 , where Me=Ba, Sr or P. Compared with hydromagnetic alloys, the main characteristics of hydromagnetic ferrite are: cheap raw materials, wide sources, simple manufacturing process, suitable for large-scale production; high resistivity, can be used in high frequency occasions; chemical stability Well, the cations in the permanent magnet ferrite lattice are in the highest oxidation state, so the material is not easy to oxidize; the permanent magnetic properties are relatively low; the temperature stability is poor. [0003] At present, the production process of the existing permanent magnet ferrite ball mill m...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of permanent magnet ferrite ball mill mixing material preparation process and its use method, to solve the existing permanent magnet ferrite ball mill mixing material preparation process in the above-mentioned background technology. production, resulting in higher production costs