A kind of soft magnetic ferrite material with high bs wide temperature and low loss and preparation method thereof
A soft ferrite, low loss technology, applied in the field of magnetic materials prepared by oxide method
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[0049] In addition, a method for preparing a soft magnetic ferrite material with high Bs, wide temperature and low loss includes the following steps:
[0050] (1) Mixing of raw materials: After batching according to the ratio of the four main component raw materials, put them into a ball mill or a sand mill, and add pure water to fully mix the four raw materials;
[0051] (2) Drying: pump the uniformly mixed slurry into the drying equipment for drying;
[0052] (3) Pre-burning: put the dried powder into the pre-burning equipment for pre-burning, the pre-burning temperature is 800-1000°C, and the pre-burning holding time is 30-180 minutes;
[0053] (4) Pulverization: Preliminarily pulverize the pre-burned powder into a small particle powder with an average particle size ≤ 5 μm in a vibrating mill, then add a combination of auxiliary ingredients, and then add pure water for fine pulverization, and the pulverized powder The average particle size of the material is controlled bet...
Embodiment 1～5
[0059] a high b s The preparation method of wide temperature low loss soft magnetic ferrite material, its specific steps are as follows:
[0060] (1) Mixing of raw materials: Accurately weigh Fe according to the ratio in the master formula 2 o 3 The content of ZnO is 53.4-54.5mol%, the content of ZnO is 7.5-9.4mol%, the content of NiO is 0.3-0.8mol%, and the rest is MnO, and pure water is added. The conductivity of pure water is less than 2us / cm. Pure water Excessive electrical conductivity will introduce harmful impurities and lead to increased loss; the weight ratio of raw materials to pure water is 1.0:1.0, and the sand mill is used for 40±2 minutes to fully mix the four raw materials.
[0061] (2) Drying: Pump the uniformly mixed slurry into a spray dryer for drying and granulation.
[0062] (3) Pre-burning: put the dried powder into the pre-burning equipment for pre-burning, the pre-burning temperature is 880°C, and the pre-burning holding time is 90 minutes.
[0063]...
Embodiment 9～12
[0084] (1) Raw material mixing: Accurately weigh Fe 2 o 3 The content of ZnO is 53.8mol%, the content of ZnO is 8.4mol%, the content of NiO is 0.55mol%, and the rest is MnO. See Table 4. And add pure water, the conductivity of pure water is less than 2μs / cm; the weight ratio of raw materials to pure water is 1.0:1.0, use a sand mill for sanding for 40±2 minutes, so that the four raw materials are fully mixed;
[0085] Table 4
[0086]
[0087] (2) Drying: Pump the uniformly mixed slurry into a spray dryer for drying and granulation.
[0088] (3) Pre-burning: Put the dried powder into the pre-burning equipment for pre-burning, the pre-burning temperature is 900°C, and the pre-burning holding time is 80 minutes.
[0089] (4) Pulverization: The pre-burned powder is coarsely pulverized in a vibrating mill into small particle powders with an average particle size ≤ 5 μm, then add auxiliary ingredients and pure water, and put it into a sand mill for fine pulverization. The a...
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