NiCuZu ferrite material and preparation method thereof
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A ferrite material and powder technology, applied in the field of NiCuZn ferrite material and its manufacturing, can solve the problems of abnormal grain growth, magnetic properties, deterioration, etc., and achieve the effect that the abnormal grain growth is not easy
Inactive Publication Date: 2012-07-11
SHENZHEN SUNLORD ELECTRONICS
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However, the addition of these low-melting point oxides or low-melting point glasses is likely to cau
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Embodiment 1
[0019] 1. Measured by mol percentage, take Fe 2 o 3 47.5mol%, ZnO 17.5mol%, CuO 9.3mol%, the balance is NiO, mixed material;
[0020] 2. Add pure water equal to the weight of the material and mix with a ball mill for 24 hours to obtain a slurry;
[0021] 3. Dry the slurry in an oven at 150°C for 48 hours to obtain a powder;
[0022] 4. Pass the powder through a 40-mesh mechanical vibrating sieve;
[0023] 5. Then pre-fire in a box-type sintering furnace at a temperature of 800 ° C for 2 hours, and then naturally cool to room temperature;
[0024] 6. Add the sintering aid Bi 2 o 3 0.5wt% and additive Co 2 o 3 0.3wt%, to obtain the mixed material;
[0025] 7. Add pure water equal to the weight of the mixed material and use a ball mill to mix and grind until the average particle size is 0.4-1.0 μm to obtain a slurry;
[0026] 8. Dry the slurry in an oven at 150°C for 48 hours to obtain a powder;
[0027] 9. Pass the powder through a 40-mesh mechanical vibrating sieve; ...
Embodiment 2
[0033] Present embodiment repeats embodiment 1 step, but gets Fe in step one 2 o 3 47.5mol%, ZnO 18.8mol%, CuO 9.3mol%, the balance being NiO. Add by weight percentage in step 6, sintering aid Bi 2 o 3 0.4wt% and additive Co 2 o 3 0.4 wt%.
Embodiment 3
[0035] Present embodiment repeats embodiment 1 step, but gets Fe in step one 2 o 3 47.5mol%, ZnO 20mol%, CuO 7.3mol%, the balance being NiO. Add by weight percentage in step 6, sintering aid Bi 2 o 3 0.2wt% and additive Co 2 o 3 0.5 wt%.
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Abstract
The invention discloses a NiCuZu ferrite material and a preparation method thereof. The technical problem to be solved is how to improve the Q value and initial permeability of the NiCuZu ferrite material under 20MHz and ensure that the abnormal growth of crystalline grains cannot easily take place. The invention adopts the following technical scheme: according to mole percentage, the main components of the NiCuZu ferrite material include 47.5 to 49.5 mol percent of Fe2O3, 14.5 to 20.5 mol percent of ZnO, 7.3 to 9.3 mol percent of of CuO and the balance of NiO, and the NiCuZu ferrite material is also added with sintering aid Bi2O3 accounting for 0.2 to 0.6 percent by weight of the weight of the main components and additive Co2O3 accounting for 0.1 to 0.5 percent by weight of the weight of the main components. The invention also provides the preparation method for the NiCuZu ferrite material. The abnormal growth of crystalline grains cannot easily take place, the initial permeability Mu i is between 70 and 100, and the Q value under 20MHz reaches 100 or more.
Description
technical field [0001] The invention relates to a NiCuZn-based ferrite material and a manufacturing method thereof, in particular to a NiCuZn-based ferrite material with improved Q value applied to a coil element and a manufacturing method thereof. Background technique [0002] In order to achieve the purpose of improving the Q value of NiCuZn-based ferrite materials, Chinese patent CN200410080412.7 has authorized and announced a NiCuZn-based ferrite material and its manufacturing method. The NiCuZn-based ferrite material except for inevitable inclusions , only the TiO 2 As an auxiliary component, let TiO 2 When the content is x, x is 0.1wt%-4.0wt%. The main component is from 43.0 to 49.8mol% Fe 2 o 3 , 4.0-13.0 mol% CuO, 5.0-35.0 mol% ZnO, and the balance being NiO. The ferrite material with this formula can increase the resistivity of the ferrite material to achieve high reliability of electronic components, and at the same time indirectly reduce the eddy current loss...
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