CN103396112B - Soft magnetic ferrite material and preparation method thereof - Google Patents
Soft magnetic ferrite material and preparation method thereof Download PDFInfo
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- CN103396112B CN103396112B CN201310258752.3A CN201310258752A CN103396112B CN 103396112 B CN103396112 B CN 103396112B CN 201310258752 A CN201310258752 A CN 201310258752A CN 103396112 B CN103396112 B CN 103396112B
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Abstract
The invention relates to a soft magnetic ferrite material and a preparation method thereof. The soft magnetic ferrite material is characterized in that, its main components comprise, by mole part: 0.5-0.6mol of Al2O3, 49-51.5mol of Fe2O3, 6-6.5mol of ZnO, 25-25.5mol of MnO, 1.2-1.3mol of CuO, and 0.2-0.3mol of Ga2O3. The modification impurities added in the main components include, in terms of the weight ratios of the impurities to the soft magnetic ferrite material: 440-480ppm of B2O, 410-430ppm of La2O3, 360-380ppm of niobium carbide, 210-230ppm of As, 310-330ppm of tantalum carbide, 220-250ppm of Mo, 340-360ppm of SiO22, and 150-180ppm of V. The raw material formula of the soft magnetic ferrite material undergoes repeated optimization study research and optimization repeatedly, is scientific and reasonable, and is low in cost. Also, the magnetic permeability is high and the magnetic core loss is low.
Description
Technical field
The present invention relates to technical field of magnetic materials, particularly, the present invention relates to a kind of soft magnetic ferrite and preparation method thereof.
Background technology
The high ferromagnetic oxide powder of magnetic flux density, magnetic core are to realize in the electronic equipments such as program control communication, digital technology, network communication colour TV, being used as the products such as inductor, filter, pulse transformer and making its miniaturization, the requisite electronic material of lightweight, improve constantly the magnetic flux density in magnetic material, it is the pursuit of being engaged in these professional engineers and technicians and production firm always, and the performance index of material are as all unsatisfactory in loss, frequency characteristic, Curie temperature etc.
Summary of the invention
The object of this invention is to provide a kind of soft magnetic ferrite and preparation method thereof.
The technical solution adopted in the present invention is:
A soft magnetic ferrite, is characterized in that, principal component counts by molar and comprises: 0.5-0.6mol Al
2o
3, 49-51.5mol Fe
2o
3, 6-6.5molZnO, 25-25.5molMnO, 1.2-1.3molCuO, 0.2-0.3molGa
2o
3,the modification impurity adding in principal component comprises according to the weighing scale that accounts for described soft magnetic ferrite: 440-480ppm B
2o
3, 410-430ppm La
2o
3, 360-380ppm niobium carbide, 210-230ppm As, 310-330ppm ramet, 220-250ppmMo, 340-360ppm SiO2
2, 150-180ppm V;
The preparation method of described soft magnetic ferrite, is characterized in that comprising the following steps:
(1) batching: principal component is prepared burden, and add modification impurity;
(2) once sintered: batching is blended in pre-burning 1-2 hour under the condition of 710 ℃-740 ℃, then be warming up to pre-burning 2-3 hour under the condition of 970 ℃-990 ℃, obtain Preburning material;
(3) ball milling, pressed compact: Preburning material is put into sand mill, add the 0.6-1.0wt% polyvinyl alcohol that is equivalent to prepare burden, 1.0-1.2wt% disperse materials, appropriate amount of deionized water to carry out sand milling 90-120 minute simultaneously, obtain slurry, and dry; The powder of oven dry is added to the polyvinyl alcohol of 1.2-1.8wt%, the stearic acid of 0. 2-0. 4wt%, and granulation, packs mould into, under 75-85Mpa pressure, is pressed into blank, naturally dries;
(4) double sintering: magnetic core blank is put into nitrogen atmosphere protection pushed bat kiln sintering, and the first heating rate with 130-150 ℃/h rises to 530-570 ℃, sintering 2-3 hour; With the heating rate of 150-180 ℃/h, rise to 780-810 ℃, sintering 2-3 hour again; Adjusting oxygen content in blanket of nitrogen is 0.5%-0.8%, then with the heating rate of 180-190 ℃/h, rises to 1350-1410 ℃, heat preservation sintering 3-4 hour; Then cooling, adjusts oxygen content in blanket of nitrogen and is 0.1%-0.2% and be cooled to 720-740 ℃ with the rate of temperature fall of 140-160 ℃/h, insulation 2-3 hour, then be cooled to room temperature with the rate of temperature fall of 260-290 ℃/h.
Disperse materials described in step (3) is made by the raw material of following weight portion: microcrystalline wax 3-4, zinc stearate 2-3, aminopropyl triethoxysilane 0.5-0.8, SnO
20.3-0.5, Nano titanium dioxide 0.3-0.5, iron powder 1.2-1.5, glycerol glycerinate 2.3-2.5;
Preparation method is: by each mixing of materials, grinding distribution evenly.
Composition of raw materials of the present invention is through repeatedly optimizing research, and scientific and reasonable, cost is lower, and has higher permeability and lower core loss.
Embodiment
A soft magnetic ferrite, principal component counts by molar and comprises: 0.6mol Al
2o
3, 51.5mol Fe
2o
3, 6molZnO, 25.5molMnO, 1.3molCuO, 0.3molGa
2o
3,the modification impurity adding in principal component comprises according to the weighing scale that accounts for described soft magnetic ferrite: 480ppm B
2o
3; 430ppm La
2o
3, 360ppm niobium carbide, 230ppm As, 330ppm ramet, 250ppmMo, 360ppm SiO2
2, 180ppm V;
The preparation method of soft magnetic ferrite, comprises the following steps:
(1) batching: principal component is prepared burden, and add modification impurity;
(2) once sintered: batching is blended in pre-burning 1-2 hour under the condition of 710 ℃-740 ℃, then be warming up to pre-burning 2-3 hour under the condition of 970 ℃-990 ℃, obtain Preburning material;
(3) ball milling, pressed compact: Preburning material is put into sand mill, add the 0.6-1.0wt% polyvinyl alcohol that is equivalent to prepare burden, 1.0-1.2wt% disperse materials, appropriate amount of deionized water to carry out sand milling 90-120 minute simultaneously, obtain slurry, and dry; The powder of oven dry is added to the polyvinyl alcohol of 1.2-1.8wt%, the stearic acid of 0. 2-0. 4wt%, and granulation, packs mould into, under 75-85Mpa pressure, is pressed into blank, naturally dries;
(4) double sintering: magnetic core blank is put into nitrogen atmosphere protection pushed bat kiln sintering, and the first heating rate with 130-150 ℃/h rises to 530-570 ℃, sintering 2-3 hour; With the heating rate of 150-180 ℃/h, rise to 780-810 ℃, sintering 2-3 hour again; Adjusting oxygen content in blanket of nitrogen is 0.5%-0.8%, then with the heating rate of 180-190 ℃/h, rises to 1350-1410 ℃, heat preservation sintering 3-4 hour; Then cooling, adjusts oxygen content in blanket of nitrogen and is 0.1%-0.2% and be cooled to 720-740 ℃ with the rate of temperature fall of 140-160 ℃/h, insulation 2-3 hour, then be cooled to room temperature with the rate of temperature fall of 260-290 ℃/h.
Disperse materials described in step (3) by following weight portion (kilogram) raw material make: microcrystalline wax 4, zinc stearate 3, aminopropyl triethoxysilane 0.8, SnO
20.5, Nano titanium dioxide 0.5, iron powder 1.2, glycerol glycerinate 2.5;
Preparation method is: by each mixing of materials, grinding distribution evenly.
The performance data of the magnetic ferrite magnetic core making by above-described embodiment:
| Sequence number | Technical indicator title | Technical indicator | Remarks |
| 1 | Initial permeability (25 ± 3 ℃) | 9500±25% | ? |
| 2 | Power loss (100Kc, 200mT) unit: KW/m 3 | 578(25±2℃), 312(100±2℃) | ? |
| 3 | Saturation flux density mT(100 ℃) | 487 | ? |
| 4 | Curie temperature ℃ | >265 | ? |
Claims (1)
1. a soft magnetic ferrite, is characterized in that, principal component counts by molar and comprises: 0.5-0.6mol Al
2o
3, 49-51.5mol Fe
2o
3, 6-6.5molZnO, 25-25.5molMnO, 1.2-1.3molCuO, 0.2-0.3molGa
2o
3,the modification impurity adding in principal component comprises according to the weighing scale that accounts for described soft magnetic ferrite: 440-480ppm B
2o
3, 410-430ppm La
2o
3, 360-380ppm niobium carbide, 210-230ppm As, 310-330ppm ramet, 220-250ppmMo, 340-360ppm SiO
2, 150-180ppm V;
Its preparation method comprises the following steps:
(1) batching: principal component is prepared burden, and add modification impurity;
(2) once sintered: batching is blended in pre-burning 1-2 hour under the condition of 710 ℃-740 ℃, then be warming up to pre-burning 2-3 hour under the condition of 970 ℃-990 ℃, obtain Preburning material;
(3) sand milling, pressed compact: Preburning material is put into sand mill, add the 0.6-1.0wt% polyvinyl alcohol that is equivalent to prepare burden, 1.0-1.2wt% disperse materials, appropriate amount of deionized water to carry out sand milling 90-120 minute simultaneously, obtain slurry, and dry; The powder of oven dry is added to the polyvinyl alcohol of 1.2-1.8wt%, the stearic acid of 0. 2-0. 4wt%, and granulation, packs mould into, under 75-85MPa pressure, is pressed into blank, naturally dries;
(4) double sintering: magnetic core blank is put into nitrogen atmosphere protection pushed bat kiln sintering, and the first heating rate with 130-150 ℃/h rises to 530-570 ℃, sintering 2-3 hour; With the heating rate of 150-180 ℃/h, rise to 780-810 ℃, sintering 2-3 hour again; Adjusting oxygen content in blanket of nitrogen is 0.5%-0.8%, then with the heating rate of 180-190 ℃/h, rises to 1350-1410 ℃, heat preservation sintering 3-4 hour; Then cooling, adjusting oxygen content in blanket of nitrogen is 0.1%-0.2%, with the rate of temperature fall of 140-160 ℃/h, is cooled to 720-740 ℃, insulation 2-3 hour, then be cooled to room temperature with the rate of temperature fall of 260-290 ℃/h;
Disperse materials described in step (3) is made by the raw material of following weight portion: microcrystalline wax 3-4, zinc stearate 2-3, aminopropyl triethoxysilane 0.5-0.8, SnO
20.3-0.5, Nano titanium dioxide 0.3-0.5, iron powder 1.2-1.5, glycerol glycerinate 2.3-2.5;
Preparation method is: by each mixing of materials, grinding distribution evenly.
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| CN104575909A (en) * | 2015-02-06 | 2015-04-29 | 苏州欢颜电气有限公司 | Composite magnetic material for electrical engineering |
| CN105481359A (en) * | 2015-11-27 | 2016-04-13 | 全椒君鸿软磁材料有限公司 | Preparation method of high performance large power soft-magnetic ferrite magnetic core material |
| CN106242544A (en) * | 2016-07-02 | 2016-12-21 | 南通保来利轴承有限公司 | A kind of Ferrite Material for intermediate-frequency transformer magnetic core and preparation method thereof |
| CN110444361B (en) * | 2019-09-09 | 2020-09-22 | 天通瑞宏科技有限公司 | Preparation method of high-frequency high-saturation magnetic flux density ferrite, inductor and transformer |
| CN112479699B (en) * | 2020-12-22 | 2022-04-15 | 深圳信义磁性材料有限公司 | Low-loss nano ferrite magnetic material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429017A (en) * | 2008-12-06 | 2009-05-13 | 广东风华高新科技股份有限公司 | Ferrite magnetic core for network communication and method for producing the same |
| CN101905970A (en) * | 2010-08-02 | 2010-12-08 | 天长市昭田磁电科技有限公司 | High magnetic conductivity and low loss factor manganese-zinc ferrite material and manufacture process thereof |
| CN102491739A (en) * | 2011-11-30 | 2012-06-13 | 宝鸡烽火诺信科技有限公司 | Lead-free NiZn soft magnetic ferrite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1798210A4 (en) * | 2004-12-17 | 2010-12-22 | Hitachi Metals Ltd | Hexagonal ferrite, and antenna and communication equipment using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429017A (en) * | 2008-12-06 | 2009-05-13 | 广东风华高新科技股份有限公司 | Ferrite magnetic core for network communication and method for producing the same |
| CN101905970A (en) * | 2010-08-02 | 2010-12-08 | 天长市昭田磁电科技有限公司 | High magnetic conductivity and low loss factor manganese-zinc ferrite material and manufacture process thereof |
| CN102491739A (en) * | 2011-11-30 | 2012-06-13 | 宝鸡烽火诺信科技有限公司 | Lead-free NiZn soft magnetic ferrite material and preparation method thereof |
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