High Tc, wide temperature ultrahigh Bs MnZn ferrite material and preparation method
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A ferrite material, ultra-high technology, applied in the field of ferrite material preparation, can solve the problem of high loss
Active Publication Date: 2013-07-24
马鞍山新康达磁业有限公司
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The properties of the obtained ferrite material are: at 100°C, BB s It is 520mT
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preparation example Construction
[0044] The preparation method of the present invention comprises the following steps:
[0045] 1. Formula
[0046] Using 58.0-62.0mol% Fe 2 o 3 , 10.0-15.0mol% ZnO, 4.0-6.0mol% NiO, the balance is MnO;
[0047] 2. One ball milling
[0048] Mix the above powders evenly in the ball mill for 1-3 hours;
[0049] 3. Pre-burning
[0050] Dry the ball abrasive obtained in step 2, press it into a round cake at 60-100MPa, and pre-fire it in a furnace at 800-1000°C for 1-3 hours;
[0051] 4. Doping
[0052] Add the following dopant by weight ratio to the powder obtained in step 3: 0.001-0.30wt%MoO 3 , 0.01-0.40wt%Bi 2 o 3 , 0.001-0.05wt%SnO 2 , 0.001-0.05wt%Nb 2 o 5 , 0.001-0.20wt%Ta 2 o 5 ;
[0053] 5. Secondary ball milling
[0054] Mix superhard ball milling media with different diameters in the ball mill according to a certain ratio, mix the powder obtained in step 4 according to a certain ball ratio, and mill in the ball mill for 4-8 hours;
[0055] 6. Forming
[...
Embodiment 1-4
[0066] Embodiment 1-4: A kind of high Curie temperature T c , wide temperature and high saturation magnetic induction BB s and lower loss P L The MnZn ferrite material of characteristic and preparation method thereof, comprises the following steps:
[0067] 1. Formula
[0068] Embodiment 1-4 major ingredient formula sees the following table:
[0069]
[0070] 2. One ball milling
[0071] Mix the above powders evenly in a ball mill for 2 hours;
[0072] 3. Pre-burning
[0073] Dry the ball mill material obtained in step 2, press it into a round cake at 60MPa, and pre-fire it in a furnace at 850°C for 2 hours;
[0074] 4. Doping
[0075] Add the powder obtained in step 3 into the dopant shown in the following table by weight:
[0076]
[0077] 5. Secondary ball milling
[0078] Mix superhard ball milling media with different diameters in the ball mill according to a certain ratio, mix the powder obtained in step 4 according to a certain ball ratio, and mill in the...
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Abstract
Belonging to the technical field of ferrite material preparation, the invention relates to a high Tc, wide temperature ultrahigh Bs MnZn ferrite material and a preparation method. The ferrite material provided in the invention is composed of main materials and doping agents. The ferrite material is characterized in that, the main materials include: 58.0-62.0mol% of Fe2O3, 10.0-15.0mol% of ZnO, 4.0-6.0mol% of NiO, and the balance MnO; and by weight percentage, with the pre-sintered main materials as reference and in terms of oxides, the doping agents include: 0.001-0.30wt% of MoO3, 0.01-0.40wt% of Bi2O3, 0.001-0.05wt% of SnO2, 0.001-0.05wt% of Nb2O5, and 0.001-0.20wt% of Ta2O5. The MnZn ferrite material provided in the invention has the characteristics of high Curie temperature (with Tc greater than or equal to 320DEG C), high wide temperature BBs (at 25DEG C, with BBs being greater than or equal to 600mT; at 100DEG C, with BBs being greater than or equal to 490mT), and low loss (100DEG C, 100kHz200mT, with PL being smaller than or equal to 800kW/m<3>), etc.
Description
technical field [0001] This technology belongs to the technical field of ferrite material preparation, especially relates to high Curie temperature (T c ), wide temperature ultra-high saturation magnetic induction (BB s ) MnZn ferrite material and its preparation method. Background technique [0002] The stable working temperature of the switching power transformer core is at a high temperature of 80°C-120°C. Under high temperature conditions, the BBs of ferrite materials has a large drop compared with normal temperature. At the same time, many electronic components used in high temperature and high current conditions, such as HID lamp ballasts, automotive power cores, etc., must at least meet: (1) be able to output sufficient power, (2) be able to withstand the instantaneous impact when starting High Current. Meeting this requirement depends largely on the properties of the ferrite magnetic material. Because high output power means large current output, if the current ...
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Application Information
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