CN103265275A - NiCuZn ferrite material and preparation method thereof - Google Patents
NiCuZn ferrite material and preparation method thereof Download PDFInfo
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- CN103265275A CN103265275A CN2013101797191A CN201310179719A CN103265275A CN 103265275 A CN103265275 A CN 103265275A CN 2013101797191 A CN2013101797191 A CN 2013101797191A CN 201310179719 A CN201310179719 A CN 201310179719A CN 103265275 A CN103265275 A CN 103265275A
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Abstract
The invention relates to a NiCuZn ferrite material and a preparation method thereof. The NiCuZn ferrite material comprises a main component and an additive. The main component consists of 44-46mol% of Fe2O3, 17-19mol% of NiO, 28-30mol% ZnO and 7-9mol% of CuO based on the main component. The additive consists of 1-2wt% of Bi2O3 or V2O5, 1-2wt% of AlBSi glass and 1-2wt% of SnO2 based on total weight of the material. Compared with the prior art, the magnetic conductivity of the NiCuZn ferrite material decreases slowly under a bias magnetic field, i.e., the magnetic conductivity of the NiCuZn ferrite material under the bias magnetic field is of certain stability. An inductance element prepared by the material is applied to electronic equipment such as DC-DC (Direct Current-Direct Current) converters to ensure that the DC-DC converters have better output voltage stability under a direct current bias condition.
Description
Technical field
The present invention relates to a kind of NiCuZn series ferrite material and preparation method thereof, belong to the soft magnetic ferrite field.
Background technology
Along with the function of electronics mobile termination is on the increase, its operating voltage that needs also becomes diversified thereupon.The picture mobile phone, digital camera, PDA etc. are many with battery powered product, their LCD backlight drive, the power source circuit of power amplifier module and IC all needs different output voltages.Like this, the transmodulator of a DC-DC of needs becomes different a plurality of voltages to give the power supply of above-mentioned functions piece the voltage transitions of battery supply.
The stability of chip inductor inductance value under the direct current biasing condition has directly had influence on the stability of output voltage in the DC-DC transmodulator, and determines that the key factor of inductor current value stabilization is the stability of core material magnetic permeability under the condition of bias magnetic field of inducer.
The magnetic permeability of common Ferrite Material can sharply descend along with the increase that adds bias magnetic field, so use common Ferrite Material having under the direct current biasing condition as the chip inductor of magnetic core, inductance value can reduce rapidly.Therefore use the DC-DC converter output voltage instability of the inducer that common Ferrite Material makes and the performance requriements that inefficiency can't satisfy expection.
Summary of the invention
Technical problem to be solved by this invention provide a kind of under bias magnetic field magnetic permeability fall NiCuZn series ferrite material and preparation method thereof more slowly, to overcome conventional iron ferrite big shortcoming of magnetic permeability fall under the bias magnetic field condition.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of NiCuZn series ferrite material, comprise principal constituent and additive, and described principal constituent is by the Fe by 44～46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28～30mol% of 17～19mol% and the CuO of 7～9mol% form, described additive is by the Bi by 1～2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1～2wt% and the SnO of 1～2wt%
2Form.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described principal constituent is by the Fe by the 45mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 29mol% of 18mol% and the CuO of 8mol% form.
Further, described additive is by the Bi by the 2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1.2wt% and the SnO of 1.5wt%
2Form.
Another technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of NiCuZn series ferrite material, it is characterized in that, and may further comprise the steps:
(1) after will the each component in the principal constituent mixing the principal constituent starting material, described principal constituent is by the Fe by 44～46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28～30mol% of 17～19mol% and the CuO of 7～9mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 1.5～2.5 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 1.5～2.5 hours, and calcined temperature is 800～1000 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 1.5～2.5 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by 1～2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1～2wt% and the SnO of 1～2wt%
2Form;
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1.5～2.5 hours in 890～910 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in the step (1), described principal constituent is by the Fe by the 45mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 29mol% of 18mol% and the CuO of 8mol% form.
Further, in the step (4), described additive is by the Bi by the 2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1.2wt% and the SnO of 1.5wt%
2Form.
Wherein, in the step (5), mixing material is carried out forming processes, specifically be that the mixing material that this is levigate passes through dry-pressing formed or flow casting molding, obtain required size, the ferrite component of shape, described ferrite component can be ferrite bead, ferrite lamina or other any desired structure.Ferrite bead can adopt dry-pressing formed mode material to be pressed into the magnet ring structure of desired size by press.
AlBSi glass refers to the aluminium borosilicate glass, mainly by SiO
2, Al
2O
3And B
2O
3Form, have high inherent glass quality, at high temperature stable, have good fusion and processing characteristics, have good chemerosiveness resistent and have the suitable coefficient of expansion.
The invention has the beneficial effects as follows: compared with prior art, NiCuZn series ferrite material of the present invention magnetic permeability under the bias magnetic field condition descends slowly, namely the magnetic permeability of NiCuZn series ferrite material of the present invention has certain stability under the bias magnetic field condition, the inductance element of this material preparation is applied in the electronicss such as DC-DC transmodulator, can guarantees that the DC-DC transmodulator has output voltage stability preferably under the direct current biasing condition.
The susceptibility that provides is provided for susceptibility and magnetic moment that magnetic permeability can be decomposed into domain wall displacement to be provided; when bias magnetic field increases to a certain degree; whole crystal grain can be magnetized to a magnetic domain; domain wall disappears; the susceptibility that is provided by domain wall can drop to zero; rotating the susceptibility that provides by magnetic moment can descend slowly along with the increase of bias magnetic field; if the crystal grain of material is controlled to certain size with the interior single domain radius that is lower than material; the magnetic permeability of material is rotated by magnetic moment entirely like this provides; along with the increase of bias magnetic field, the material magnetic permeability will change slower.
In addition, in magnetic circuit, have under the situation of air gap existence, according to ohm's law for magnetic circuit, the magnetic field that acts on the magneticsubstance can be much smaller than the magnetic field of air gap, form thicker air gap if in material, add a large amount of glassy phases at intergranule, actually like this be applied to magnetic field on the crystal grain just less than the magnetic field of reality, the velocity of variation of material magnetic permeability can reduce equally greatly.Bi in the additive
2O
3Or V
2O
5Play the effect of the sintering temperature that reduces material, AlBSi glass provides the crystal boundary glassy phase on the one hand, can control the growth of crystal grain on the one hand, SnO
2Be used for the growth of subcontrol crystal grain.
Description of drawings
Fig. 1 is the bright NiCuZn series ferrite material of this law preparation method's schema;
Fig. 2 is the magnetic permeability biasing characteristic curve comparison diagram of NiCuZn series ferrite material of the present invention and common NiCuZn series ferrite material.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and feature are described, institute gives an actual example and only is used for explaining the present invention, is not for limiting scope of the present invention.
A kind of NiCuZn series ferrite material comprises principal constituent and additive, and described principal constituent is by the Fe by 44～46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28～30mol% of 17～19mol% and the CuO of 7～9mol% form, described additive is by the Bi by 1～2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1～2wt% and the SnO of 1～2wt%
2Form.Described Bi
2O
3Or V
2O
5Role is for reducing the sintering temperature of material; The effect of AlBSi glass is to provide on the one hand the crystal boundary glassy phase, can control the growth of crystal grain on the one hand, and also other can play the glass of similar identical function; SnO
2Effect be can subcontrol crystal grain growth.
Fig. 1 is the bright NiCuZn series ferrite material of this law preparation method's schema, and as described in Figure 1, a kind of preparation method of NiCuZn series ferrite material is characterized in that, may further comprise the steps:
(1) after will the each component in the principal constituent mixing the principal constituent starting material, described principal constituent is by the Fe by 44～46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28～30mol% of 17～19mol% and the CuO of 7～9mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 1.5～2.5 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 1.5～2.5 hours, and calcined temperature is 800～1000 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 1.5～2.5 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by 1～2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1～2wt% and the SnO of 1～2wt%
2Form;
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1.5～2.5 hours in 890～910 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
Wherein, in the step (5), mixing material is carried out forming processes, specifically be that the mixing material that this is levigate passes through dry-pressing formed or flow casting molding, obtain required size, the ferrite component of shape, described ferrite component can be ferrite bead, ferrite lamina or other any desired structure.Ferrite bead can adopt dry-pressing formed mode material to be pressed into the magnet ring structure of desired size by tabletting machine.
Embodiment 1
Carry out following steps successively:
(1) after the each component of principal constituent is mixed the principal constituent starting material, described principal constituent is by the Fe by the 45mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 29mol% of 18mol% and the CuO of 8mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 2 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 2 hours, and calcined temperature is 900 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 2 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by the 1wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1.2wt% and the SnO of 1.5wt%
2Form;
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1 hour in 900 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
Embodiment 2
Carry out following steps successively:
(1) after the each component of principal constituent is mixed the principal constituent starting material, described principal constituent is by the Fe by the 44mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 30mol% of 17mol% and the CuO of 9mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 2 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 2 hours, and calcined temperature is 900 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 2 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by the 1.5wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1wt% and the SnO of 1wt%
2Form;
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1 hour in 900 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
Embodiment 3
Carry out following steps successively:
(1) after the each component of principal constituent is mixed the principal constituent starting material, described principal constituent is by the Fe by the 46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28mol% of 19mol% and the CuO of 7mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 2 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 2 hours, and calcined temperature is 900 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 2 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by the 1wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 2wt% and the SnO of 2wt%
2Form;
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1 hour in 900 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
Comparison example
Carry out following steps successively:
(1) after the each component of principal constituent is mixed the principal constituent starting material, described principal constituent is by the Fe by the 45mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 29mol% of 18mol% and the CuO of 8mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 2 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 2 hours, and calcined temperature is 900 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 2 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by the 2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1 hour in 900 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
Embodiment 1,2,3 and comparison example in shown in the addition of each component sees the following form:
With above-described embodiment 1,2,3 and the NiCuZn series ferrite material that makes of comparison example carry out the permeability experiment, obtain result as shown in the table:
Wherein, embodiment 1 is optimal technical scheme, comparison example is the preparation method of common NiCuZn series ferrite material in the prior art, the common NiCuZn series ferrite material that the NiCuZn series ferrite material that embodiment 1 is made and comparison example make draws comparison diagram as shown in Figure 2 by experiment, the existing NiCuZn series ferrite material that embodiment 1 is made is called the A ferrite for convenience of description, and the NiCuZn series ferrite material that comparison example is made is called the B ferrite.Experimentation is for to apply onesize bias current respectively to A ferrite and B ferrite, and this bias current increases gradually, as described in Figure 2, at bias current during near 4A, the ferritic magnetic permeability of B is near 30, and after bias current surpassed 5A, the fall of the ferritic magnetic permeability of A was just suitable with the ferritic fall of B, thereby under the ferritic magnetic permeability of A that amplitude is slow than the B ferrite.
Compared with prior art NiCuZn series ferrite material of the present invention magnetic permeability under the bias magnetic field condition descends slowly, namely the magnetic permeability of NiCuZn series ferrite material of the present invention has certain stability under the bias magnetic field condition, in electronicss such as the required DC-DC transmodulator of the inductance element of this material preparation, can guarantee that the DC-DC transmodulator has output voltage stability preferably under the stream bias condition.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a NiCuZn series ferrite material is characterized in that, comprises principal constituent and additive, and described principal constituent is by the Fe by 44～46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28～30mol% of 17～19mol% and the CuO of 7～9mol% form, described additive is by the Bi by 1～2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1～2wt% and the SnO of 1～2wt%
2Form.
2. NiCuZn series ferrite material according to claim 1 is characterized in that, described principal constituent is by the Fe by the 45mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 29mol% of 18mol% and the CuO of 8mol% form.
3. NiCuZn series ferrite material according to claim 1 is characterized in that, described additive is by the Bi by the 2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1.2wt% and the SnO of 1.5wt%
2Form.
4. the preparation method of a NiCuZn series ferrite material is characterized in that, may further comprise the steps:
(1) after will the each component in the principal constituent mixing the principal constituent starting material, described principal constituent is by the Fe by 44～46mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 28～30mol% of 17～19mol% and the CuO of 7～9mol% form;
(2) described principal constituent starting material are put into ball mill and carry out ball milling, the ball milling time is 1.5～2.5 hours;
(3) the principal constituent starting material behind the described ball milling are placed on carry out pre-burning in the sintering oven and handle, the pre-burning time is 1.5～2.5 hours, and calcined temperature is 800～1000 ℃;
(4) add additive in the principal constituent starting material after the described pre-burning and obtain mixing material, mixing material is put into ball mill carry out levigate processing, the levigate time is 1.5～2.5 hours, be 0.7～1.7 micron until the average grain particle diameter, described additive is by the Bi by 1～2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1～2wt% and the SnO of 1～2wt%
2Form;
(5) described mixing material after levigate is carried out forming processes;
(6) with the sintering 1.5～2.5 hours in 890～910 ℃ of chamber type sintering stoves of the mixing material after the described moulding, obtain described NiCuZn series ferrite material.
5. the preparation method of NiCuZn series ferrite material according to claim 4 is characterized in that, in the step (1), described principal constituent is by the Fe by the 45mol% of the molar percentage that accounts for principal constituent
2O
3, the ZnO of NiO, 29mol% of 18mol% and the CuO of 8mol% form.
6. the preparation method of NiCuZn series ferrite material according to claim 4 is characterized in that, in the step (4), described additive is by the Bi by the 2wt% of the weight percent that accounts for whole material gross weight
2O
3Or V
2O
5, the AlBSi glass of 1.2wt% and the SnO of 1.5wt%
2Form.
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| CN105036722A (en) * | 2015-06-25 | 2015-11-11 | 深圳振华富电子有限公司 | Nicuzn ferrite and preparation method thereof |
| CN105036723A (en) * | 2015-06-25 | 2015-11-11 | 深圳振华富电子有限公司 | Nickel-zinc-copper ferrite powder and preparation method thereof |
| CN105601262A (en) * | 2015-12-23 | 2016-05-25 | 苏州冠达磁业有限公司 | Preparation method of ferrite magnetic material for multilayer chip inductor |
| CN106699159A (en) * | 2016-12-15 | 2017-05-24 | 东莞华晶粉末冶金有限公司 | Ferrite powder and preparation method and application thereof |
| CN107879736A (en) * | 2016-09-30 | 2018-04-06 | Tdk株式会社 | Ferrite composition and electronic unit |
| CN115028443A (en) * | 2022-06-09 | 2022-09-09 | 广东风华高新科技股份有限公司 | Laminated ferrite inductance material and preparation method thereof |
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| CN105036722A (en) * | 2015-06-25 | 2015-11-11 | 深圳振华富电子有限公司 | Nicuzn ferrite and preparation method thereof |
| CN105036723A (en) * | 2015-06-25 | 2015-11-11 | 深圳振华富电子有限公司 | Nickel-zinc-copper ferrite powder and preparation method thereof |
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| CN107879736A (en) * | 2016-09-30 | 2018-04-06 | Tdk株式会社 | Ferrite composition and electronic unit |
| CN107879736B (en) * | 2016-09-30 | 2020-12-01 | Tdk株式会社 | Ferrite composition and electronic component |
| CN106699159A (en) * | 2016-12-15 | 2017-05-24 | 东莞华晶粉末冶金有限公司 | Ferrite powder and preparation method and application thereof |
| CN115028443A (en) * | 2022-06-09 | 2022-09-09 | 广东风华高新科技股份有限公司 | Laminated ferrite inductance material and preparation method thereof |
| CN115028443B (en) * | 2022-06-09 | 2023-10-31 | 广东风华高新科技股份有限公司 | Laminated ferrite inductance material and preparation method thereof |
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Application publication date: 20130828 |