A 4-element formula ultra-high bs manganese zinc ferrite material and preparation method
A manganese-zinc ferrite, ultra-high technology, applied in the field of 4-element formula ultra-high Bs manganese-zinc ferrite material and preparation, can solve the problem of high power loss of the magnetic core, to meet performance and cost requirements, low loss, The effect of low material cost
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Embodiment 1
[0018] will consist of 65.5mol% Fe 2 o 3 , 19.3mol% of MnO, 14mol% of ZnO, and 1.2mol% of NiO were mixed in a sand mill for 1 hour. After drying, they were pressed into a round cake with an outer diameter of 100mm under a pressure of 10Mpa, and then dried at 800 Pre-fire at ℃ for 2 to 4 hours. Based on the quality of the powder after calcining, add auxiliary components to the above calcined material, the added auxiliary components (ppm) are: 600ppm of CaCO 3 , 200ppm ZrO 2 , 120ppm WO 3 , 200ppm MoO 3 , 400ppm Nb 2 o 5 . Then carry out secondary sanding for 140 minutes, and dry the secondary sanding slurry for particle size testing. SMD is 0.9-1.1 μm, X50 is 1-1.15 μm, and X90 is less than 3 μm. After adding PVA, carry out spray granulation, and the shape is Φ25* 15*8 standard ring cores are sintered. 600 ℃ ~ 1360 ℃ heating rate 5 ℃ / min, at 1360 ℃ for 6 hours, oxygen concentration 2.5%, according to the equilibrium oxygen concentration for atmosphere protection cool...
Embodiment 2
[0021] The formula is: 63.5mol% Fe 2 o 3 , 16.5 mol% of MnO, 16 mol% of ZnO, 4 mol% of NiO, the manufacturing process, sintering process and test conditions are the same as in Example 1.
Embodiment 3
[0023] The formula is: 61.5mol% Fe 2 o 3 , 14.5 mol% of MnO, 18 mol% of ZnO, 6 mol% of NiO, the manufacturing process, sintering process and test conditions are the same as in Example 1.
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