CN105152645A - Manganese zinc ferrite with wideband, low loss and high strength and preparation method of manganese zinc ferrite - Google Patents
Manganese zinc ferrite with wideband, low loss and high strength and preparation method of manganese zinc ferrite Download PDFInfo
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- CN105152645A CN105152645A CN201510569667.8A CN201510569667A CN105152645A CN 105152645 A CN105152645 A CN 105152645A CN 201510569667 A CN201510569667 A CN 201510569667A CN 105152645 A CN105152645 A CN 105152645A
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- low loss
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Abstract
The invention discloses manganese zinc ferrite with wideband, low loss and high strength and a preparation method of the manganese zinc ferrite. The manganese zinc ferrite comprises a main body system and a composite system, wherein the main body system comprises the following components in percentage by mass: 48 to 51 percent of Fe2O3, 39 to 46 percent of MnO and 10 to 16 percent of ZnO; the composite system accounts for 12 to 25 percent of the total mass of the main body system and comprises CaCO3, CoO, NiO, CuO, SiO2, Bi2O3 and MoO3. By the adjustment of a formula design and a forming and sintering process, the manganese zinc ferrite disclosed by the invention has extremely-low loss and excellent mechanical strength within a wider frequency range, also has higher Curie temperature and can adapt to a vehicle-mounted device in an intense jolt environment or an open-air environment with dramatic weather change. The manganese zinc ferrite complies with the development trend of the current electronic industry, widens the application range of magnetic core products, enables electronic products to be developed towards small model and high efficiency, and provides effective help for structural adjustment and energy conservation and emission reduction of the electronic industry in China.
Description
Technical field
The present invention relates to soft magnetic bodies preparing technical field, particularly relate to a kind of wideband low loss and high strength Mn-Zn ferrite and preparation method thereof.
Background technology
Along with automotive lighting, automobile mounted dc-dc, LCD(LED) the inverter transformer of indicating meter and convertible frequency air-conditioner, solar inverter fast development, require can have low-loss power-type ferrite under high temperature (80 DEG C ~ 160 DEG C) running environment in a large number, particularly onboard system, convertible frequency air-conditioner, LED, invertor etc. all require at high temperature have high efficiency power transfer, require high Curie temperature with the change that conforms simultaneously.Therefore, require that magnetic permeability is lower than conventional MnZn ferrite material, possess wideband low loss characteristic (1KHz-500KHz), meet magnetic core strength test requirement simultaneously and to jolt the car-mounted device of environment or the violent open-air atmosphere of Changes in weather to adapt to fierceness.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of wideband low loss and high strength Mn-Zn ferrite and preparation method thereof, can meet the service requirements of existing electronics.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of wideband low loss and high strength Mn-Zn ferrite, described Mn-Zn ferrite is at 100mT, and within the scope of 200 ~ 500KHz, loss is lower than 180 ~ 900kw/m
3, at 200mT, within the scope of 25 ~ 100KHz, loss is lower than 60 ~ 300kw/m
3; Described Mn-Zn ferrite comprises host system and compound system; Described host system is the Fe of 48 ~ 51% by mass percent
2o
3, the MnO of 39 ~ the 46% and ZnO of 10 ~ 16%; Described compound system accounts for 12 ~ 25% of described host system total mass; Described compound system comprises CaCO
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3.
In a preferred embodiment of the present invention, CaCO in described compound system
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3mass ratio be 3 ~ 5:1 ~ 2:0.5 ~ 1.5:0.5 ~ 1:2 ~ 3:0.8 ~ 1.2:0.3 ~ 0.8.
In a preferred embodiment of the present invention, described SiO
2particle diameter be 100 ~ 500nm.
For solving the problems of the technologies described above, another technical solution used in the present invention is: the preparation method providing a kind of wideband low loss and high strength Mn-Zn ferrite, comprises the steps:
(1) weighing and process: take described host system and compound system by formula, and described host system is placed into electrothermic type rotary kiln pre-burning 0.5 ~ 1h, then mixed grinding 20 ~ 30min in planetary ball mill is placed on, add described compound system wherein again, mixed grinding 60 ~ 90min, obtains the compound that median size is 0.3 ~ 0.5 μm;
(2) mixed slurry is prepared: put into by the compound obtained in step (1) in husky mill stirrer, add deionized water while stirring and carry out mixed sand mill, add dispersion agent after husky mill and stir, obtain mixed slurry;
(3) blank is prepared: by the mixed slurry of preparation in step (2) after press filtration, partial desiccation, be pressed into briquet;
(4) form by a firing: on the rotary billet erecting frame briquet obtained in step (3) loaded program in sintering oven, close sintering oven, and open air content in rare gas element regulating stove, open temperature programming stove power supply and carry out sinter molding, described sintering process is: be directly warming up to 1340 ~ 1350 DEG C with the temperature rise rate of 80 ~ 100 DEG C/h from room temperature, then heat preservation sintering 6h, finally close ascending order heating furnace power supply, and room temperature is cooled to the furnace in constant air content situation, obtain described wideband low loss and high strength Mn-Zn ferrite.
In a preferred embodiment of the present invention, the calcined temperature in described step (1) is 600 ~ 700 DEG C.
In a preferred embodiment of the present invention, in described step (2), the add-on of described deionized water is 1.2 ~ 1.5 times of mixture quality; Described dispersion agent to be mass concentration be 20 ~ 25% polyvinyl alcohol water solution, its consumption is 0.1 ~ 0.3 times of mixture quality.
In a preferred embodiment of the present invention, in described step (2), described husky grinding process is: rotating speed 50 ~ 60 turns/min, time 60 ~ 80min.
In a preferred embodiment of the present invention, in described step (4), described rare gas element is nitrogen, and described furnace air volume content is 15 ~ 30%.
The invention has the beneficial effects as follows: a kind of wideband low loss and high strength of the present invention Mn-Zn ferrite, by the adjustment of formulating of recipe and process of shaping-sintering, ultralow loss and excellent mechanical strength can be possessed in wider range of frequency, possesses higher Curie temperature simultaneously, fierceness can be adapted to jolt the car-mounted device of environment or the violent open-air atmosphere of Changes in weather, the present invention adapts to the development trend of current electron trade, widen the Application Areas of magnetic core product, make electronic product to ting model, high efficiency develops, to China's electronic industry structural adjustment, energy-saving and emission-reduction provide effective help.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
A kind of wideband low loss and high strength Mn-Zn ferrite, comprises host system and compound system; Described host system is the Fe of 48 ~ 51% by mass percent
2o
3, the MnO of 39 ~ the 46% and ZnO of 10 ~ 16%; Described compound system accounts for 12 ~ 25% of described host system total mass; Described compound system comprises CaCO
3, CoO, NiO, CuO, SiO
2(particle diameter is 100 ~ 500nm), Bi
2o
3and MoO
3; CaCO in described compound system
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3mass ratio be 3 ~ 5:1 ~ 2:0.5 ~ 1.5:0.5 ~ 1:2 ~ 3:0.8 ~ 1.2:0.3 ~ 0.8.
The present invention is by the formula of science, unique raw material disposal mode, unique sintering row's base technique and inertia sintering atmosphere, make prepared Mn-Zn ferrite can possess ultralow loss and excellent mechanical strength in wider range of frequency, possesses higher Curie temperature simultaneously, it is at 100mT, within the scope of 200 ~ 500KHz, loss is lower than 180 ~ 900kw/m
3, at 200mT, within the scope of 25 ~ 100KHz, loss is lower than 60 ~ 300kw/m
3; Described Mn-Zn ferrite can adapt to fierceness and to jolt the car-mounted device of environment or the violent open-air atmosphere of Changes in weather, the present invention adapts to the development trend of current electron trade, widen the Application Areas of magnetic core product, make electronic product to ting model, high efficiency development, to China's electronic industry structural adjustment, energy-saving and emission-reduction provide effective help.
Concrete preparation method is as follows:
Embodiment 1
(1) weighing and process: take Fe by formula
2o
348mol, the MnO of 46% and the ZnO of 16% and total amount are the CaCO of 12mol
3, CoO, NiO, CuO, SiO
2(particle diameter is 100nm), Bi
2o
3and MoO
3; Wherein, CaCO
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3mass ratio be 3:1:0.5:1:2:0.8:0.3;
By described Fe
2o
3, MnO and ZnO be placed into electrothermic type rotary kiln pre-burning 1h at 600 DEG C, be then placed on mixed grinding 20 ~ 30min in planetary ball mill, then add the CaCO taken wherein
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3, mixed grinding 60 ~ 90min, obtains the compound that median size is 0.3 ~ 0.5 μm;
(2) mixed slurry is prepared: put into by the compound obtained in step (1) in husky mill stirrer, add the deionized water accounting for compound dry mass 1.2 times while stirring under the rotating speed of 50r/min, carry out mixed sand mill 80min, adding mass concentration after husky mill is that the polyvinyl alcohol water solution of 20% is as dispersion agent, its consumption is that 0.1 times of dispersion agent of mixture quality stirs, and obtains mixed slurry;
(3) blank is prepared: the mixed slurry of preparation in step (2) is first become filter cake with pressure filter press filtration, then is dried to loft drier half-dried, then make magnetic core blank;
(4) form by a firing: on the rotary billet erecting frame briquet obtained in step (3) loaded program in sintering oven, close sintering oven, and open nitrogen gas, air content 15% in regulating stove, open temperature programming stove power supply and carry out sinter molding, described sintering process is: be directly warming up to 1340 DEG C with the temperature rise rate of 80 DEG C/h from room temperature, then heat preservation sintering 6h, finally close ascending order heating furnace power supply, and room temperature is cooled to the furnace in constant air content situation, obtain described wideband low loss and high strength Mn-Zn ferrite.
Embodiment 2
(1) weighing and process: take Fe by formula
2o
3the ZnO of MnO and 10mol of 51mol, 39mol and total amount are the CaCO of 25mol
3, CoO, NiO, CuO, SiO
2(particle diameter is 100nm), Bi
2o
3and MoO
3; Wherein, CaCO
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3mass ratio be 5:2:1.5:0.5:3:1.2:0.8;
By described Fe
2o
3, MnO and ZnO be placed into electrothermic type rotary kiln pre-burning 0.5h at 700 DEG C, be then placed on mixed grinding 20 ~ 30min in planetary ball mill, then add the CaCO taken wherein
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3, mixed grinding 60 ~ 90min, obtains the compound that median size is 0.3 ~ 0.5 μm;
(2) mixed slurry is prepared: put into by the compound obtained in step (1) in husky mill stirrer, add the deionized water accounting for compound dry mass 1.5 times while stirring under the rotating speed of 60r/min, carry out mixed sand mill 60min, adding mass concentration after husky mill is that the polyvinyl alcohol water solution of 25% is as dispersion agent, its consumption is that 0.3 times of dispersion agent of mixture quality stirs, and obtains mixed slurry;
(3) blank is prepared: the mixed slurry of preparation in step (2) is first become filter cake with pressure filter press filtration, then is dried to loft drier half-dried, then make magnetic core blank;
(4) form by a firing: on the rotary billet erecting frame briquet obtained in step (3) loaded program in sintering oven, close sintering oven, and open nitrogen gas, air content 30% in regulating stove, open temperature programming stove power supply and carry out sinter molding, described sintering process is: be directly warming up to 1350 DEG C with the temperature rise rate of 100 DEG C/h from room temperature, then heat preservation sintering 6h, finally close ascending order heating furnace power supply, and room temperature is cooled to the furnace in constant air content situation, obtain described wideband low loss and high strength Mn-Zn ferrite.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a wideband low loss and high strength Mn-Zn ferrite, is characterized in that, described Mn-Zn ferrite is at 100mT, and within the scope of 200 ~ 500KHz, loss is lower than 180 ~ 900kw/m
3, at 200mT, within the scope of 25 ~ 100KHz, loss is lower than 60 ~ 300kw/m
3; Described Mn-Zn ferrite comprises host system and compound system; Described host system is the Fe of 48 ~ 51% by mass percent
2o
3, the MnO of 39 ~ the 46% and ZnO of 10 ~ 16%; Described compound system accounts for 12 ~ 25% of described host system total mass; Described compound system comprises CaCO
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3.
2. wideband low loss and high strength Mn-Zn ferrite according to claim 1, is characterized in that, CaCO in described compound system
3, CoO, NiO, CuO, SiO
2, Bi
2o
3and MoO
3mass ratio be 3 ~ 5:1 ~ 2:0.5 ~ 1.5:0.5 ~ 1:2 ~ 3:0.8 ~ 1.2:0.3 ~ 0.8.
3. wideband low loss and high strength Mn-Zn ferrite according to claim 2, is characterized in that, described SiO
2particle diameter be 100 ~ 500nm.
4. the preparation method of wideband low loss and high strength Mn-Zn ferrite according to claim 1 and 2, is characterized in that, comprise the steps:
(1) weighing and process: take described host system and compound system by formula, and described host system is placed into electrothermic type rotary kiln pre-burning 0.5 ~ 1h, then mixed grinding 20 ~ 30min in planetary ball mill is placed on, add described compound system wherein again, mixed grinding 60 ~ 90min, obtains the compound that median size is 0.3 ~ 0.5 μm;
(2) mixed slurry is prepared: put into by the compound obtained in step (1) in husky mill stirrer, add deionized water while stirring and carry out mixed sand mill, add dispersion agent after husky mill and stir, obtain mixed slurry;
(3) blank is prepared: by the mixed slurry of preparation in step (2) after press filtration, partial desiccation, be pressed into briquet;
(4) form by a firing: on the rotary billet erecting frame briquet obtained in step (3) loaded program in sintering oven, close sintering oven, and open air content in rare gas element regulating stove, open temperature programming stove power supply and carry out sinter molding, described sintering process is: be directly warming up to 1340 ~ 1350 DEG C with the temperature rise rate of 80 ~ 100 DEG C/h from room temperature, then heat preservation sintering 6h, finally close ascending order heating furnace power supply, and room temperature is cooled to the furnace in constant air content situation, obtain described wideband low loss and high strength Mn-Zn ferrite.
5. the preparation method of wideband low loss and high strength Mn-Zn ferrite according to claim 4, is characterized in that, the calcined temperature in described step (1) is 600 ~ 700 DEG C.
6. the preparation method of wideband low loss and high strength Mn-Zn ferrite according to claim 4, is characterized in that, in described step (2), the add-on of described deionized water is 1.2 ~ 1.5 times of mixture quality; Described dispersion agent to be mass concentration be 20 ~ 25% polyvinyl alcohol water solution, its consumption is 0.1 ~ 0.3 times of mixture quality.
7. the preparation method of wideband low loss and high strength Mn-Zn ferrite according to claim 4, is characterized in that, in described step (2), described husky grinding process is: rotating speed 50 ~ 60 turns/min, time 60 ~ 80min.
8. the preparation method of wideband low loss and high strength Mn-Zn ferrite according to claim 4, is characterized in that, in described step (4), described rare gas element is nitrogen, and described furnace air volume content is 15 ~ 30%.
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Cited By (8)
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| CN105503166A (en) * | 2015-12-23 | 2016-04-20 | 苏州冠达磁业有限公司 | Mn-Zn ferrite with broad frequency and high electromagnetic properties as well as preparation method of Mn-Zn ferrite |
| CN105503165A (en) * | 2015-12-23 | 2016-04-20 | 苏州冠达磁业有限公司 | Mn-Zn ferrite with wide temperature, high saturation magnetic flux density and low loss as well as preparation method of Mn-Zn ferrite |
| CN105601263A (en) * | 2015-12-23 | 2016-05-25 | 苏州冠达磁业有限公司 | High-performance power soft-magnetic Mn-Zn ferrite material and preparation method thereof |
| CN107055623A (en) * | 2016-12-29 | 2017-08-18 | 山东东泰电子科技有限公司 | The manufacture method of manganese-zinc ferrite magnetic |
| CN107216138A (en) * | 2017-04-28 | 2017-09-29 | 苏州冠达磁业有限公司 | Electromagnetic induction wireless charging manganese-zinc ferrite magnetic sheet and preparation method thereof |
| CN110128124A (en) * | 2019-05-13 | 2019-08-16 | 海宁联丰磁业股份有限公司 | A kind of wide temperature ultra-low loss soft magnetic ferrite and preparation method thereof |
| CN110526702A (en) * | 2019-10-12 | 2019-12-03 | 合肥工业大学 | A kind of preparation method of the compound manganese-zinc ferrite wideband wave absorbing material of carbon |
| CN111039668A (en) * | 2019-12-30 | 2020-04-21 | 苏州冠达磁业有限公司 | Manganese-zinc ferrite with wide temperature, high initial permeability and high Curie temperature and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105503166A (en) * | 2015-12-23 | 2016-04-20 | 苏州冠达磁业有限公司 | Mn-Zn ferrite with broad frequency and high electromagnetic properties as well as preparation method of Mn-Zn ferrite |
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| CN107216138A (en) * | 2017-04-28 | 2017-09-29 | 苏州冠达磁业有限公司 | Electromagnetic induction wireless charging manganese-zinc ferrite magnetic sheet and preparation method thereof |
| CN110128124A (en) * | 2019-05-13 | 2019-08-16 | 海宁联丰磁业股份有限公司 | A kind of wide temperature ultra-low loss soft magnetic ferrite and preparation method thereof |
| CN110128124B (en) * | 2019-05-13 | 2021-12-07 | 海宁联丰磁业股份有限公司 | Wide-temperature ultralow-loss soft magnetic ferrite material and preparation method thereof |
| CN110526702A (en) * | 2019-10-12 | 2019-12-03 | 合肥工业大学 | A kind of preparation method of the compound manganese-zinc ferrite wideband wave absorbing material of carbon |
| CN111039668A (en) * | 2019-12-30 | 2020-04-21 | 苏州冠达磁业有限公司 | Manganese-zinc ferrite with wide temperature, high initial permeability and high Curie temperature and preparation method thereof |
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