Method for preparing lanthanum-free and cobalt-free calcium permanent magnet ferrite materials
A permanent magnet ferrite and main component technology, applied in the field of permanent magnet ferrite material preparation, can solve problems such as difficulty in ion co-precipitation, high pre-burning temperature, etc., and achieve industrial production, controllable process conditions, and reaction temperature low effect
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[0041] Example 1: Press (1-x-y)AO·xBaO· Bi 2 O 3 ·(N-z-w)Fe 2 O 3 ·2zZnO·2wMnO composition formula, A is Ca. Among them, x=0.21, y=0.03, z=0.2, w=0.005, n=5.4 Weigh the weight (the main component raw material is specifically: Fe 2 O 3 , Bi 2 O 3 , Mn 2 O 3 , BaCO 3 , CaCO 3 , ZnO), and then weigh the molten salt: Na 2 SO 4 +K 2 SO 4 +Li 2 SO 4 (Respective mole percentage: 29.5%, 30%, 40.5%), the molten salt weight is 10% based on the total weight of each raw material of the main component, put into the wet ball mill in the ball mill together, the ball milling time is 7 hours (average particle size 0.6-1μm), After drying the obtained mixture, keep it at 500°C for 2 hours under atmospheric conditions, then heat it up to 920°C at 3°C / min, keep it for 3 hours, and then crush the pre-burned material into powder with a vibrating crusher after cooling down. The particle size D50 is 2.8μm. Then weigh the calcined material powder and transfer it into the sedimentation tank. After washin...
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[0042] Example 2 The amount of molten salt as the main component is 15% of the total weight of each raw material, and the rest is the same as in Example 1.
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[0043] Example 3 The amount of molten salt as the main component is 20% of the total weight of each raw material, and the rest is the same as in Example 1.
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