MgMnZn type ferrite and manufacturing method thereof
A technology of ferrite and silicon oxide, applied in the field of MgMnZn ferrite for making anti-interference magnetic cores and its preparation, can solve the problems of high cost, narrow frequency width, narrow application range, etc.
Inactive Publication Date: 2012-05-23
HUZHOU AOKE PORCELAIN IND
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Problems solved by technology
However, although the existing nickel-zinc ferrite has a frequency of more than 1MHZ, the cost is relatively high because nickel is a precious rare metal.
Although the cost of manganese-zinc ferrite is lower than that of nickel-zinc ferrite, its cut-off frequency is only 0.5 ~ 1MHZ, and the available frequency width is relatively narrow
And magnesium zinc ferrite, although the cut-off frequency can reach more than 30MHZ, but can not be used for relatively low frequency, so the application range is relatively narrow
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0015] Add 12g of zinc oxide, 60g of iron oxide and 5% of magnesium oxide to the mixer in sequence for mixing, then pre-fire at 1050°C for 40 minutes to obtain a pre-fired powder;
[0016] After adding 0.5g of silicon oxide, 7g of manganese carbonate, 0.5g of calcium carbonate and 5 magnesia to the pre-fired powder, carry out secondary crushing, add binder and mix, and use spray granulation method to obtain an average diameter of 0.1 ~ 0.8mm particles;
[0017] Dry the granules, press them into shape, and trim them to obtain a molded body;
[0018] After sintering the molded body at 1300°C for 2.5 hours, the temperature is lowered to obtain the MgMnZn ferrite of the present invention.
[0019] In the above-mentioned MgMnZn-based ferrite, the porosity of the ferrite is 2%, the Curie point is greater than 120°C, the resistivity is greater than 107 ohm·cm, and the initial magnetic permeability at 1khz and 25°C is 600, In the magnetic field of H=1600A / m, the saturation magnetic ...
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Abstract
The invention provides an MgMnZn type ferrite, which is characterized in that the MgMnZn type ferrite is prepared by the following components in parts by weight: 5-18 parts of MgO, 9-21parts of ZnO, 50-70 parts of FeO, 0.01-1 part of SiO, 0.01-1 part of CaCO3 and 5-10 parts of MnCO3. For the ferrite in the invention, the porosity is 1.9-2.1%, the Curie point is larger than 120 DEG C, the resistivity is over 107Ohm.cm, the initial permeability is 600+ / -25% under the temperature of 25 DEG C in 1khz, and the saturation magnetic flux density is larger than 2600m / A under the temperature of 25 DEG C in a magnetic field in which H=1600A / m. The invention uses the mixture of the MgZn ferrite and the MnZn ferrite, thus obtaining a higher cut-off use frequency and use arrange of broadband.
Description
technical field [0001] The invention relates to a MgMnZn series ferrite and a preparation method thereof, in particular to a MgMnZn series ferrite used for making an anti-interference magnetic core and a preparation method thereof. Background technique [0002] With the rapid development of the information industry, the manufacturing technology of electronic equipment is constantly updated, and the demand for ferrite is also increasing. However, although the current nickel-zinc ferrite has a use frequency as high as 1 MHz or more, the cost is relatively high because nickel is a precious rare metal. Although the cost of manganese-zinc ferrite is lower than that of nickel-zinc ferrite, its cut-off frequency is only 0.5 ~ 1MHZ, and the available frequency width is relatively narrow. However, although the cut-off frequency of magnesium zinc ferrite can reach more than 30MHZ, it cannot be used for relatively low frequencies, so the application range is relatively narrow. Conte...
Claims
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IPC IPC(8): H01F1/34C04B35/26C04B35/622
Inventor 屠新根
Owner HUZHOU AOKE PORCELAIN IND