A kind of manufacturing method of ferromagnetic core containing silicon dioxide
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A technology of silicon dioxide and production method, which is applied in the direction of inductor/transformer/magnet manufacturing, inorganic material magnetic, electrical components, etc., to achieve the effect of uniform grains, large grains, and less cracks
Active Publication Date: 2016-05-04
TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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Problems solved by technology
Now the electronic communication industry needs ferrite cores with low core loss and high magnetic permeability to meet the miniaturization and high efficiency requirements of current electrical equipment, and the existing magnetic cores are difficult to meet the above requirements
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Embodiment 1
[0013] Embodiment 1: The manufacturing method of ferromagnetic core containing silicon dioxide includes the following steps:
[0014] (1) Pre-fired mixture: The mass of mixture A is Fe 2 O 3 70mol, MnO22mol, ZnO4mol, aluminum nitride 0.18mol, copper 0.18mol, boron 0.04mol, aluminum 0.35mol, silicon dioxide 0.17mol, titanium dioxide 0.20mol, tin 0.07mol; mixture B is equivalent to the total weight of mixture A Components in the following proportions: 55ppmMoO 3 , 110ppmV 2 O 5 , 85ppmBi 2 O 3 , 32ppm boron oxide, 70ppm zirconium oxide, 22ppm barium oxide, 320ppmTi and 200ppmNi; respectively accurately weigh the mixture A and the mixture B, and mix them separately with a mixing tank. The mixing time is 3 hours at 3500-4200 rpm, Then they are sent to the rotary kiln for pre-sintering, the temperature is controlled to be 360-450°C, the pre-sintering time is 2.5 hours, and the pre-sintered mixture A and mixture B are obtained;
[0015] (2) Grinding: The pre-fired mixture A and B in step...
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Abstract
The invention discloses a method for manufacturing a ferromagnetic core containing silicon dioxide. The method include steps of performing pre-sintering on a mixture A comprising Fe<2>O<3>, MoO, ZnO, aluminum nitride, copper, boron, aluminum, the silicon dioxide, titanium dioxide and tin and a mixture B comprising MoO<3>, V<2>O<5>, Bi<2>O<3>, boron dioxide, zirconium dioxide, barium dioxide, Ti and Ni; then sequentially performing grinding, mixing and pulping, powder spray-drying, green body pressing and sintering processes on the mixture A and the mixture B to obtain the ferromagnetic core. The method has the advantages that owing to an optimized formulation design and the sintering process, the initial permeability of a product manufactured by the method is 15000, cracking of the sintered product is little, the qualified rate of the product reaches 95% at least, the product is high in grain boundary resistivity and low in porosity, crystal grains of the product are large and uniform, the impendence characteristic of the product in a high-frequency range is excellent, various electromagnetic properties of the product are stable, and the ferromagnetic core product is applicable to various electronic fields.
Description
Technical field [0001] The invention relates to the manufacturing field of oxide magnetic materials, in particular to a manufacturing method of a ferromagnetic core containing silicon dioxide. Background technique [0002] With the development of communication technology and digitalization of electronic products, new requirements have been put forward for soft ferrites and components. High-performance and high-permeability magnetic cores are widely used in various basic materials for telecommunications and information, such as common mode filters, Saturated inductance, current transformers, leakage protectors, insulating transformers, signal and pulse transformers and other fields have been widely used. The current electronic communication industry requires ferrite cores with low core loss and high permeability to meet the current miniaturization and high efficiency requirements of electrical equipment. The existing magnetic cores cannot meet the above requirements. Summary of t...
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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/11C04B35/64
Inventor 徐杰杨从会黄国祥刘京州曾性儒张忠仁王玉志
Owner TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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