CN1221987C - High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof - Google Patents
High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof Download PDFInfo
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- CN1221987C CN1221987C CN 02150733 CN02150733A CN1221987C CN 1221987 C CN1221987 C CN 1221987C CN 02150733 CN02150733 CN 02150733 CN 02150733 A CN02150733 A CN 02150733A CN 1221987 C CN1221987 C CN 1221987C
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Abstract
The present invention relates to the technical field of a soft magnetic ferrite and particularly belongs to a magnet material of a high-frequency fine grain soft magnetic ferrite and a production process thereof. The magnet material is mainly prepared from the components measured by oxides: 50 to 57% of iron oxide (Fe2O3), 0 to 13% of zinc oxide (ZnO) and 30 to 50% of manganese oxide (MnO) as the principal raw materials and a doping component M as the rest. The magnet material is characterized in that the average grain size of the soft magnetic ferrite is from 3 mu m to 5 mu m. The present invention uses the processing steps of compounding, ball milling, vibration milling, presintering, sand milling, granulating, shaping, sintering, grinding and packaging. The process of the present invention is suitable for industrial bulk production. The present invention has the characteristics of low production cost, stable process and high magnetic permeability and small power loss on the product. The product reaches the technical index of a power ferrite material PC50 with high frequency and low consumption. Thereby favorable conditions are provided for realizing the miniaturization and the sheet type of an electronic device.
Description
Technical field
The present invention relates to the soft magnetic ferrite technical field, specifically is to belong to a kind of high frequency fine grain soft magnetic ferrimagnetics material and production technology thereof.
Background technology
Soft magnetic ferrimagnetics is a kind of material with high magnetic permeability, high resistivity and low loss characteristic, thereby is used widely in fields such as transformer, inductor, Switching Power Supply, communication apparatus, filter, computer electron rectifiers; Along with the continual renovation of the fast development of information industry technology and electronic equipment manufacturing technology and perfect, magnetic core components and parts market to the high performance switch power supply with the demand of high-frequency and low-consumption material with increasing.The loss of soft magnetic ferrite under alternating field can be divided into three kinds basically: magnetic hysteresis loss, eddy current loss and residual loss etc., soft magnetic ferrite is in manufacture process, usually adopting mixes improves the frequency characteristic of material, reducing its conductivity and eddy current loss, and make it to form suitable microstructure.Some doping composition can produce resistive formation at ferritic crystal boundary, as SiO
2, impurity such as CaO can assemble at the crystal boundary place usually, producing such resistive formation, but also must consider the influence of residual loss etc. under high frequency.
The physical characteristic of MnZn Ferrite Material mainly be by the prescription of constituent material and the preparation material technology determined that the general type of this material prescription is Mn
(1-x)Zn
xMyFe
2O
4, wherein, M is the doping composition, and Y is a doping, and x is the content of zinc, and theory and practice proves that all by rational tissue prescription and manufacturing process, an amount of associated alloys element that mixes just can obtain corresponding macroscopic magnetization energy.As, an important parameter of soft magnetism high-frequency low-consumption power Ferrite Material is exactly the power loss under high frequency, mixing in right amount to produce resistive formation at ferritic crystal boundary place, thereby improves the resistivity of material monolithic, to reduce the eddy current loss of material under high frequency.
Publication number CN1287985A has introduced a kind of " magnetic ferrites materials " of Japanese TDK Corp. invention, though have high magnetic permeability, high resistivity and low loss characteristic, required material purity requires high when producing because of it, what adopt in the preparation of powder is the spray roasting production technology, its equipment investment is big, production cost is high, be difficult to carry out at home, in order to solve the demand of domestic market to soft magnetic ferrite, in conjunction with the high-frequency soft magnetic Ferrite Material of national physical condition development and production, be a problem that presses for solution.
Summary of the invention
The object of the present invention is to provide a kind of high frequency fine grain soft magnetic ferrite and production technology thereof with high magnetic permeability, high resistivity and low loss characteristic.
High frequency fine grain soft magnetic ferrite of the present invention is that primary raw material is made by iron oxide, zinc oxide and manganese oxide, the average grain size that it is characterized in that the soft magnetic ferrite that becomes with above-mentioned material development is 3～5 μ m, and each component in the weight percentage ranges of oxide is: Fe
2O
3: 50-57%; ZnO:0-13%; MnO:30-50%; All the other are doping composition M.
The production technology of high frequency fine grain soft magnetic ferrite of the present invention, it is characterized in that the processing step that adopts is: batching, ball milling, vibration, pre-burning, sand milling, granulation, moulding, sintering, mill processing and packing, in burn in step, adopt air kiln directly powder to be carried out pre-burning, temperature is 900～1000 ℃, and the time is 1～3h; In sintering step, adopt sintering furnace to carry out, and use N
2Gas shiled sintering, sintering temperature are 1100～1400 ℃; Sintering time is 1～5h, controls ferritic crystallite dimension at 3～5 μ m, cools off in balanced atmosphere then.
Because the average grain size of soft magnetic ferrite of the present invention is 3～5 μ m, each component is reasonable in the weight percentage ranges of oxide, and adopt the production technology of batching, ball milling, vibration, pre-burning, sand milling, granulation, moulding, sintering, mill processing and packing, be fit to industrialized mass production, its production cost is low, process stabilizing, product have characteristics such as magnetic permeability height, power loss is little, frequency characteristic is good.
Below in conjunction with specific embodiment, the invention will be further described:
Description of drawings
Fig. 1 for the present invention in 20～100 ℃ temperature range power consumption with the variation of temperature situation
Fig. 2 is the present invention's temperature variant situation of power consumption under the different frequency test condition
Fig. 3 for the present invention in the time of 100 ℃ under the different frequency power consumption with the situation of change in magnetic flux density
Fig. 4 for the present invention under different magnetic flux densities power consumption with the situation of frequency change
Embodiment
Described high frequency fine grain soft magnetic ferrite of the present invention is that primary raw material is made by iron oxide, zinc oxide and manganese oxide, the average grain size of described soft magnetic ferrite is 3～5 μ m, and each component in the weight percentage ranges of oxide is: Fe
2O
3: 50-57%; ZnO:0-13%; MnO:30-50%; All the other are doping composition M.
The production technology of described high frequency fine grain soft magnetic ferrite is carried out according to the following steps: batching-ball milling-vibration-pre-burning-sand milling-granulation-moulding-sintering-mill processing and packing, described ball milling operation adopts V-arrangement blender dry type to mix by force, the time of batch mixing is 0.5～1h, the pre-burning operation adopts air kiln directly powder to be carried out pre-burning, temperature is 900～1000 ℃, and the time is 1～3h; The sand milling operation adopts circulating sand mill to carry out sand milling, and the sand milling time is 1～3h; Material: ball: water=1: 1: 0.55～0.65; Powder particle mean size behind sand milling is 1.0～1.2 μ m; Molding procedure adopts the full-automatic dry press to carry out, and green density is controlled at 2.8～3.3g/cm
3, dimensional tolerance is controlled at ± 0.1mm, and sintering circuit adopts sintering furnace to carry out, and uses N
2Gas shiled sintering, sintering temperature are 1100～1400 ℃; Sintering time is 1～5h, controls ferritic crystallite dimension at 3～5 μ m, cools off in balanced atmosphere then.
The concrete production craft step of described high frequency fine grain soft magnetic ferrite is as follows:
(1) batching: each component in the weight percentage ranges of oxide is: Fe
2O
3: 55%; ZnO:3%; MnO:37%; All the other are doping composition M;
(2) ball milling: mix by force with V-arrangement blender dry type, the time of batch mixing is 0.7h;
(3) vibration: adopt the vibrating ball-mill vibration, the vibration time is 0.6h;
(4) pre-burning: adopt air kiln directly powder to be carried out pre-burning, temperature is 950 ℃, and the time is 2.5h;
(5) sand milling: adopt circulating sand mill to carry out sand milling, the sand milling time is 2.5h, material: ball: water=1: 1: 0.60; Powder particle mean size behind sand milling is 1.0～1.2 μ m;
(6) granulation: adopt the comminutor granulation, 270 ℃ of inlet temperatures, outlet temperature are 130 ℃;
(7) moulding: adopt the full-automatic dry press to carry out, green density is controlled at 3.0g/cm
3, dimensional tolerance is controlled at ± 0.1mm;
(8) sintering: adopt sintering furnace to carry out, and use N
2Gas shiled sintering, sintering temperature are 1300 ℃; Sintering time is 4h, controls ferritic crystallite dimension at 3～5 μ m; In balanced atmosphere, cool off then;
(9) mill processing: adopt grinding machine to process, surface roughness reaches Ra=0.2～1.4 μ m;
(10) pack: after mill processing qualified product were ordered case packing, warehouse-in got final product.
After adopting V-arrangement blender dry type to mix by force, use the vibrating ball-mill vibration again, can avoid raw material production suction caking, reach the more uniform effect of batch mixing;
Doping composition M described in the present invention's batching is meant sized particles at nanometer scale or micron order, and contains the alloy of four kinds of materials in the following material: CaCO at least
3: 0.06-0.2wt%, SiO
2: 0-0.04wt%, Nb
2O
5: 0-0.08wt%, TiO
2: 0-2wt%, SnO
2: 0-2wt%, ZrO
2: 0-0.06wt%, Na
2CO
3: 0-0.1wt%, Co
2O
3: 0-2wt%, Al
2O
3: 0-0.08wt%, Ta
2O
5: 0-0.1wt%.
The high frequency fine grain soft magnetic ferrite that adopts above-mentioned process to obtain, its quality characteristic surpasses Japanese TDK company, reach the N49 of high-frequency low-consumption power Ferrite Material PC50 and Siemens, 3F3, the 3F35 of Dutch Philips company, the technical indicator of products such as 3F4,3F45, thereby provide advantage for miniaturization, the chip type of realizing electronic device.
Claims (2)
1, a kind of high frequency fine grain soft magnetic ferrite, it is that primary raw material is made by iron oxide, zinc oxide and manganese oxide, the average grain size that it is characterized in that described soft magnetic ferrite is 3～5 μ m, and each component in the weight percentage ranges of oxide is: Fe
2O
3: 50～57%; ZnO:0～13%; MnO:30～37%; All the other are doping composition M, and described doping composition M is meant particle at nanoscale, and contains the alloy of four kinds of materials in the following material: CaCO at least
3: 0.06-0.2wt%, SiO
2: 0-0.04wt%, Nb
2O
5: 0-0.08wt%, TiO
2: 0-2wt%, SnO
2: 0-2wt%, ZrO
2: 0-0.06wt%, Na
2CO
3: 0-0.1wt%, Co
2O
3: 0-2wt%, Al
2O
3: 0-0.08wt%, Ta
2O
5: 0-0.1wt%.
2, the production technology of high frequency fine grain soft magnetic ferrite as claimed in claim 1, it is characterized in that the processing step that adopts is: batching, ball milling, vibration, pre-burning, sand milling, granulation, moulding, sintering, mill processing and packing, in burn in step, adopt air kiln directly powder to be carried out pre-burning, temperature is 900～1000 ℃, and the time is 1～3h; In sintering step, adopt sintering furnace to carry out, and use N
2Gas shiled sintering, sintering temperature are 1100～1400 ℃; Sintering time is 1～5h, controls ferritic crystallite dimension at 3～5 μ m, cools off in balanced atmosphere then.
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|---|---|---|---|
| CN 02150733 CN1221987C (en) | 2002-11-27 | 2002-11-27 | High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02150733 CN1221987C (en) | 2002-11-27 | 2002-11-27 | High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1503280A CN1503280A (en) | 2004-06-09 |
| CN1221987C true CN1221987C (en) | 2005-10-05 |
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Cited By (1)
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| CN108101527A (en) * | 2017-12-07 | 2018-06-01 | 天长市昭田磁电科技有限公司 | A kind of high frequency fine grain soft magnetic ferrite and preparation method thereof |
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| CN100345226C (en) * | 2005-05-30 | 2007-10-24 | 苏州冠达磁业有限公司 | Ferrite magnet material of manganese-zinc, and Method for preparing high conductive ferrite of manganese-zinc from material |
| CN100369860C (en) * | 2005-08-11 | 2008-02-20 | 横店集团东磁有限公司 | Mn-Zn ferrite material and production process thereof |
| KR101187172B1 (en) * | 2007-03-07 | 2012-09-28 | 도다 고교 가부시끼가이샤 | Ferrite Molded Sheet, Sintered Ferrite Substrate and Antenna Module |
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| CN102408227B (en) * | 2011-08-19 | 2013-07-31 | 湖南阳东磁性材料有限公司 | Manganese zinc material with high magnetic permeability and sintering method thereof |
| CN102531560A (en) * | 2011-12-30 | 2012-07-04 | 南通鼎源电子磁材有限公司 | Magnetism, copper and zinc-iron soft magnetic ferrite material and preparation method thereof |
| CN102881397A (en) * | 2012-09-27 | 2013-01-16 | 无锡宏昌五金制造有限公司 | Zinc-manganese alloy material |
| CN102982947B (en) * | 2012-11-23 | 2016-05-04 | 天长市昭田磁电科技有限公司 | One contains Bi2O3The manufacture method of ferromagnetic core |
| CN104036908A (en) * | 2014-06-26 | 2014-09-10 | 南京新中磁电技术工程有限公司 | Magnetic material |
| CN105023691A (en) * | 2015-07-23 | 2015-11-04 | 南通保来利轴承有限公司 | Iron oxide based anti-electromagnetic interference magnet material and preparation method |
| CN108424135A (en) * | 2018-03-13 | 2018-08-21 | 海宁市天丰磁业有限公司 | A kind of preparation method of ferrite magnetic material |
| CN115385677B (en) * | 2022-09-02 | 2023-05-30 | 上海华源磁业股份有限公司 | Wide-temperature low-power-consumption manganese zinc ferrite PF-2T material and preparation process thereof |
| CN115894006A (en) * | 2022-12-30 | 2023-04-04 | 北京七星飞行电子有限公司 | Preparation method of ferrite material with high frequency, high Bs and low loss power |
| CN116813320A (en) * | 2023-06-08 | 2023-09-29 | 浙江工业大学 | MnZn ferrite for MHz frequency |
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2002
- 2002-11-27 CN CN 02150733 patent/CN1221987C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101527A (en) * | 2017-12-07 | 2018-06-01 | 天长市昭田磁电科技有限公司 | A kind of high frequency fine grain soft magnetic ferrite and preparation method thereof |
| CN108101527B (en) * | 2017-12-07 | 2021-10-15 | 浙江博安检验检测技术有限公司 | High-frequency fine-grain soft magnetic ferrite material and preparation method thereof |
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