A kind of manufacturing method of ferromagnetic core containing modified nano-carbon
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A production method, nano-carbon technology, applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., to achieve the effects of less cracking, high grain boundary resistivity, and stable electromagnetic properties
Active Publication Date: 2016-08-03
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
[0014] Embodiment 1: the preparation method that contains the ferromagnetic core of modified nano-carbon, comprises the following steps:
[0015] (1) Pre-fired mixture: mixture A molar Fe 2 o 3 75mol, MnO19mol, 0.12mol of ceramic powder, 0.12mol of aluminum, 0.10mol of zinc, 0.28mol of niobium, 0.12mol of modified nano-carbon and 0.30mol of straw ash; the composition of mixture B is the following ratio equivalent to the total weight of mixture A : 78ppm Bi 2 o 3 , 280ppmCaCO 3 , 105ppm nickel oxide, 105ppm palladium oxide, 55ppm scandium oxide, 190ppm lanthanum oxide, 210ppmSi and 140ppmB; accurately weigh mixture A and mixture B respectively, use mixing tanks to mix separately, and stir and mix at 3800-4000 rpm. After 2-4 hours, they are sent to the rotary kiln for pre-burning respectively, the temperature is controlled at 950-400°C, and the pre-burning time is 2-3 hours to obtain pre-fired mixture A and mixture B;
[0016] The preparation method of the modified nano-car...
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Abstract
The invention discloses a method for manufacturing a ferromagnetic core containing modified nano-carbon. The method includes steps of performing pre-sintering on a mixture A comprising Fe<2>O<3>, MnO, ceramic powder, aluminum, zinc, niobium, the modified nano-carbon and straw ash and a mixture B comprising Bi<2>O<3>, CaCO<3>, nickel oxide, palladium oxide, scandium oxide, lanthanum oxide, Si and B; 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 total weight of the mixture is equivalent to that of the mixture A. 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 18000, cracking of the sintered product is little, the qualified rate of the product reaches 97% 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 field of manufacturing oxide magnetic materials, in particular to a method for manufacturing a ferromagnetic core containing modified nano-carbon. Background technique [0002] With the development of communication technology and digitalization of electronic products, new requirements are put forward for soft ferrite 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 inductors, current transformers, leakage protectors, insulation transformers, signal and pulse transformers and other fields have been widely used. 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. The existing magnetic cores are difficult to meet the above requirements...
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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/33C04B35/64
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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