Barium permanent magnetic ferrite and preparation method thereof
A technology of permanent magnet ferrite and molded body, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problems of losing the high cost performance of M-type permanent ferrites and increasing production costs, and achieves uniform growth. , to prevent excessive growth, the effect of low energy consumption
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[0036] Example 1
[0037] The preparation method of barium permanent ferrite in this embodiment includes the following steps:
[0038] (1) Ingredients, ball mill: Weigh 1680g Fe 2 O 3 , 24.4g BaCO 3 , 72g CaCO 3 , 48.2g Co 3 O 4 , 165g La 2 O 3 , Add 2400ml deionized water, put it in a roller ball mill, ball mill for 3h, get mixed slurry;
[0039] (2) Drying and pre-burning: drying the mixed slurry obtained in step (1) at 120°C for 8 hours to obtain a powder, and then pre-burning the powder in an air atmosphere at 1100°C for 2 hours to obtain a pre-burned material;
[0040] (3) Vibration grinding: Place the pre-burned material obtained in step (2) in a vibratory mill and vibrate for 100s to obtain coarse powder with an average particle size of 3 μm;
[0041] (4) Secondary ball milling: weigh 400g of coarse powder obtained in step (3), and add 3.2g of CaCO 3 , 0.8gBi 2 O 3 , 1gBaSi 2 O 5 , 2g calcium gluconate, 0.8 boric acid and 1200mL deionized water, placed in a ball mill, ball milled...
Example Embodiment
[0043] Example 2
[0044] In this example, 0.9% CaCO is added 3 -0.2%Bi 2 O 3 -0.25%BaSi 2 O 5 Composite sintering aid (calculated based on the weight of coarse powder), other operation steps are the same as in Example 1.
Example Embodiment
[0045] Example 3
[0046] In this example, 0.8% CaCO is added 3 -0.15%Bi 2 O 3 -0.25%BaSi 2 O 5 Composite sintering aid (calculated based on the weight of coarse powder), other operation steps are the same as in Example 1.
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