CN105272195A - NiZn series ferrite wave-absorbing material core and manufacturing method thereof - Google Patents

NiZn series ferrite wave-absorbing material core and manufacturing method thereof Download PDF

Info

Publication number
CN105272195A
CN105272195A CN201510821292.XA CN201510821292A CN105272195A CN 105272195 A CN105272195 A CN 105272195A CN 201510821292 A CN201510821292 A CN 201510821292A CN 105272195 A CN105272195 A CN 105272195A
Authority
CN
China
Prior art keywords
additive
absorbing material
magnetic core
wave
series ferrite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510821292.XA
Other languages
Chinese (zh)
Inventor
周继军
秦会斌
李少奕
屠凡
周奕兆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Dianzi University
Original Assignee
Hangzhou Dianzi University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Dianzi University filed Critical Hangzhou Dianzi University
Priority to CN201510821292.XA priority Critical patent/CN105272195A/en
Publication of CN105272195A publication Critical patent/CN105272195A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The invention discloses a NiZn series ferrite wave-absorbing material core and a manufacturing method thereof. The core comprises main components and additives; the main components comprise 64-70 wt% of Fe2O3, 15-25 wt% of ZnO and 6-21 wt% of NiO, and the total weight percentage of the content of the main components is 100 %; tantalum oxides and/or niobium oxides are adopted as the additives. According to the NiZn series ferrite wave-absoring material core and the manufacturing method thereof, the resistance value of the manufactured NiZn series ferrite core is improved by more than 15% at 25 MHz; the initial permeability is more than 3000, and a good filter effect on noise electromagnetic wave below 1MHz is achieved; not only are the properties of the wave-absorbing material core improved, but also the frequency range of noise electromagnetic wave absorbing is widened.

Description

A kind of Ni-Zn series ferrite wave-absorbing material magnetic core and manufacture method thereof
Technical field
The invention belongs to the technical field of Materials science, particularly relate to a kind of Ni-Zn series ferrite wave-absorbing material magnetic core and manufacture method thereof.The magnetic core made by this formula and method can be assembled into the effect devices such as signal connecting line, electric wire, electronics and equipment played to noise absorption of electromagnetic wave.
Background technology
Current suction ripple magnetic core material is NiZn, MgZn and MnZn Ferrite Material, and MnZn Ferrite Material is generally applied to the frequency of below 1MHz, and the suction ripple magnetic core of this kind of material manufacture is just inoperative in the frequency of more than 1MHz; The range of frequency of the suction ripple magnetic core application of NiZn, MgZn material manufacture is 1MHz to 500MHz, is comparatively suitable for when 1MHz-1000MHz as inhaling ripple magnetic core.
The development of electronic information technology proposes the requirement developed to broadband, high-absorbility and high frequency direction to absorbing material.As the key element of anti-EMI filter (electromagnetic interference), the raising of magnetic core on the electromagnetic specific absorption of noise and frequency manufacturing noise electromagnetic wave absorbent material with magneticsubstance has important impact.Its purposes in computer signal connection cord, computer main frequency wire, sound signal wire, switch power supply, computer circuitry plate, automatic equipment, electronic transformer etc. is very wide.In recent years, magnesium Zn soft magnetic ferrite technology obtains increasing concern, as Chinese Patent Application No. be CN200410093230.3 application discloses that a kind of soft magnetic Mg-Zn ferrite material and low temperature sintering technology thereof, it is made up of Fe203, MgO, ZnO, MnO, CuO, it is characterized in that each composition and consumption as follows: Fe 2o 347.5-48.7wt%, MgO 2the low-temperature sintering such as 5.5-30wt%, ZnO18.0-21.4wt%, MnO0.5-1.2wt%, flux 3.0-4.2wt%, auxiliary material 0-5wt% is formed.And for example Chinese Patent Application No. is that application discloses that of CN200410053529.6 a kind of inhales ripple MgZn ferrite and manufacture method, it is prepared burden at magnesium oxide, zinc oxide, ferric oxide three kinds of main components, after being mixed in proportion at 1000 DEG C-1200 DEG C calcination 30-90 minute, then secondary component materials and additive is added in proportion, after being pulverized and mixed, add tackiness agent to mix and adopt Spray granulation method to obtain particle that average particulate diameter is 180 microns, then by particle compression moulding, required magnetic core sample is obtained; Progressively be warmed up to 1250 DEG C-1350 DEG C, and at set temperature heat preservation sintering 2-5 hour, obtain fired sample after cooling; Have the zinc oxide of the magnesium oxide of 8-27mol% (calculating by MgO), 7-27mol% (calculating by ZnO) in its sample, 30-36.7mol% is (by Fe 2o 3calculate) ferric oxide three kinds of main components, wherein also can add and have one or more minor components, it comprises: 0-4mol% is (by MnCO 3calculate) manganous carbonate, 0-4mol% (calculating by NiO) nickel oxide, 0-4mol% is (by CuCO 3calculate) copper carbonate.And for example Japanese Patent No. be 2806528B2 patent discloses a kind of wave absorber magnesium-Zn ferrite material, it is by ferric oxide 47-50mol%, magnesium oxide 20-23mol%, zinc oxide 24-27mol%, the tabular sintered body that manganese oxide 3-6mol% forms, at the wave absorber magnesium-Zn ferrite of the low-frequency range of 30MHz-400MHz.The ferrite wave-absorbing material of prior art has following shortcoming:
1, the inadequate science of every material mixture ratio, the impedance of ferrite wave-absorbing material magnetic is lower, and additive is not ideal enough in addition, fails to adjust its overall magnetic property preferably.
2, the electromagnetic range of frequency of noise needing absorption is 1Hz to 1000MHz, need two kinds process with the use of, both needed to comprise absorb the following noise hertzian wave of 1MHz frequency need the magnetic core that manufactures of MnZn material, also need to absorb the magnetic core that the above noise hertzian wave of 1MHz frequency need use NiZn material or the manufacture of other material, because the initial permeability of NiZn Ferrite Material is less than 1500 at present, undesirable in the following result of use of 1MHz frequency.
3, starting material all disposable proportioning when preparing burden is good, and like this when pre-burning, the micro-additive of interpolation just partly defines spinel structure, not easily makes minor material be evenly distributed in the surface of particle.
For above deficiency, present invention optimizes the proportioning of main material, resistance value when 25MHz improves more than 15%, initial permeability reaches more than 3000 simultaneously, good filter action is played to the noise hertzian wave of below 1MHz, not only increase the performance of absorbing material magnetic core, widen the electromagnetic range of frequency of absorption noise simultaneously.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of Ni-Zn series ferrite wave-absorbing material magnetic core and manufacture method thereof, by the optimization of main proportioning components and the selection of additive, make the Ni-Zn series ferrite wave-absorbing material magnetic core overall performance of manufacture excellent, not only increase the impedance of ferrite wave-absorbing material magnetic core, widen the electromagnetic range of frequency of absorption noise simultaneously.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A kind of Ni-Zn series ferrite wave-absorbing material magnetic core, comprise main composition and additive, it is characterized in that, described main composition is ferric oxide Fe 2o 3, zinc oxide ZnO, nickel protoxide NiO, described main composition in the weight percentage of respective standard substance is: Fe 2o 3be 6-21wt% for 64-70wt%, ZnO are 15-25wt%, NiO, wherein main component content amounts to weight percent is 100wt%; Described additive is tantalum pentoxide and/or niobium oxide.
Preferably, the percentage composition that described additive weight accounts for main composition is: 0.05wt%-2wt%.
Preferably, described tantalum additive is Ta 2o 5or the tantalum pentoxide of other form.
Preferably, described niobium additive is Nb 2o 5or the niobium oxide of other form.
A manufacture method for Ni-Zn series ferrite wave-absorbing material magnetic core, adopts main composition and the preparation of additive content proportioning of above-mentioned Ni-Zn series ferrite wave-absorbing material magnetic core, comprises following steps:
S10, batching: the main composition getting described various ratio, is mixed to get main raw material;
S20, mixing: adopt vibration or alternate manner to be mixed by main raw material;
S30, pre-burning: the starting material mixed are carried out pre-burning;
S40, grinding: the additive adding described weight, in Preburning material, grinds after Homogeneous phase mixing;
S50, granulation: obtain Ni-Zn series ferrite wave-absorbing material powder;
S60, shaping: by Ni-Zn series ferrite wave-absorbing material powder pressing forming;
S70, sintering: the blank after sinter molding makes it to be formed the ferrite with spinel structure.
Preferably, described sintering temperature is 1200 DEG C-1320 DEG C.
Preferably, described calcined temperature is 900 DEG C-1100 DEG C.
Compared with prior art, the present invention has following beneficial effect:
1, ferrite of the present invention improves the absorbing property of material by adding additive, especially in 10MHz-100MHz range of frequency, its resistance value improves more than 15% than the nickel-zinc ferrite not adding additive, have well to noise electromaganic wave absorbing property in other range of frequency equally, made magnetic core is applicable to be assembled into the effect devices such as signal connecting line, electric wire, electronics played to noise absorption of electromagnetic wave;
2, present invention employs nickel-zinc ferrite as ferritic main composition, its initial magnetic permeability reaches more than 3000, also serves fine restraining effect to the noise hertzian wave of below 1MHz;
4, the additive that the present invention adds adds in Preburning material, enables additive be evenly distributed in ferrite like this, improves the performance of material;
5, additive of the present invention is tantalum pentoxide and niobium oxide, makes ferrite separate out crystallite in sintering process, improves the crystalline-granular texture of material internal, thus improves ferromagnetic resonance frequency, meets signal connecting line to the electromagnetic absorption of noise.So both improve the upper limit frequency of utilization of material, widen again the suction wave frequency range of material;
6, the invention provides a kind of making method of above-mentioned ferrite wave-absorbing material, it adopts adds additive in ferrite after pre-burning completes, and makes ferritic additive to be dispersed in crystal preferably;
7, the present invention is preferred calcined temperature and sintering temperature, make production method of the present invention more be applicable to component of the present invention, it fully takes into account the reaction how making additive and other material, to reach more preferably effect.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the manufacture method of a kind of Ni-Zn series ferrite wave-absorbing material of the present invention magnetic core.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
On the contrary, the present invention is contained any by the substituting of making on marrow of the present invention and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the present invention, in hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.
A kind of Ni-Zn series ferrite wave-absorbing material magnetic core, comprise main composition and additive, main composition is ferric oxide Fe 2o 3, zinc oxide ZnO, nickel protoxide NiO, main composition in the weight percentage of respective standard substance is: Fe 2o 3be 6-21wt% for 64-70wt%, ZnO are 15-25wt%, NiO, wherein main component content amounts to weight percent is 100wt%; Additive is tantalum pentoxide and/or niobium oxide.The component ratio of the present invention is preferred main composition ferric oxide, zinc oxide, nickel protoxide, the present invention simultaneously with the addition of tantalum pentoxide and/or niobium oxide, gained Ferrite Material of the present invention is made to improve the resistance value of 25MHz, both improve the resistance value of the magnetic core manufactured with this material, good sorption can be played to noise hertzian wave in 1Hz-1000MHz range of frequency, especially, the wave-absorbing effect of ferrite wave-absorbing material of the present invention between 20MHz-300MHz is obvious, is especially suitable for the absorption of this frequency electromagnetic.
In embody rule embodiment, the percentage composition that additive weight accounts for main composition is: 0.05wt%-2wt%.The oxide compound of the tantalum in additive of the present invention, the oxide compound of niobium mainly improve ferritic performance, add many and can increase cost, also can cause the degradation of Ferrite Material, so control in above-mentioned scope, good invention effect can be reached and meet the requirement of controlling cost.This saying of amount that additive of the present invention accounts for main composition is all that oxide compound is made based on main composition, usually in the selection of the composition of main composition, various composition not necessarily oxide compound, but through pre-burning, substantially crystalline phase can be formed, additive of the present invention is just using the quality of the main composition through pre-burning as benchmark, this is that main composition all can become final ferritic integral part, according to enter ferritic main composition as denominator proportioning additive pointed and operability.The present invention takes above-mentioned percentage composition to add can meet prevention grain growing, reaches the object controlling grain size, can improve again the resistance value of magnetic core.
In embody rule embodiment, tantalum additive is Ta 2o 5or the tantalum pentoxide of other form.
In embody rule embodiment, niobium additive is Nb 2o 5or the niobium oxide of other form.
One or both in the oxide compound of interpolation tantalum, the oxide compound of niobium can make ferrite separate out crystallite in sintering process in main composition, molecule is formed in bulk material inside, stop growing up of crystal grain simultaneously, reach existing nanocrystalline at material internal, there are again sub-micron crystal and sub-meter Jing, namely commaterial inside is made up of the crystal grain of different structure size, their ferromagnetic resonance frequency point is different, so can absorb the hertzian wave of different noises, meet the requirement of signal connecting line to the electromagnetic absorption of noise.So just improve the upper limit frequency of utilization of material, widen the scope of the suction wave frequency of material.
It should be noted that the oxide compound of tantalum of the present invention, the oxide compound of niobium is not limited to Ta 2o 5and Nb 2o 5, may also be the oxide compound of other form, the present invention in order to describe the content of tantalum and niobium element in ferrite better, unification Ta 2o 5and Nb 2o 5parts by weight represent the ratio that tantalum and niobium element are shared in ferrite.
In technical solution of the present invention, in manufacture ferrite wave-absorbing material magnetic core, play similar effect as the oxide compound of the tantalum of additive and the oxide compound of niobium, the oxide compound of tantalum and the oxide compound of niobium mix by the effect played also similar.
In technical solution of the present invention, the source of ferritic various metallic element can be multiple, and these are well known to those of ordinary skill in the art.Such as Fe 2o 3the FeO of amount such as to be equal to.
As shown in Figure 1, it is the manufacture method flow chart of steps of a kind of Ni-Zn series ferrite wave-absorbing material of the present invention magnetic core, adopts above-mentioned Ni-Zn series ferrite to inhale the main composition of ripple magnetic core and the preparation of additive content proportioning, comprises following steps:
S10, batching: the main composition getting as above various ratio, is mixed to get main raw material;
S20, mixing: adopt vibration or alternate manner to be mixed by main raw material;
S30, pre-burning: the starting material mixed are carried out pre-burning, calcined temperature is 900 DEG C-1100 DEG C;
S40, grinding: the additive adding as above weight, in Preburning material, grinds after Homogeneous phase mixing, and grinding can adopt the mode such as ball milling, sand milling;
S50, granulation: obtain Ni-Zn series ferrite wave-absorbing material powder, size of powder particles is 50-200 order;
S60, shaping: by Ni-Zn series ferrite wave-absorbing material powder pressing forming;
S70, sintering: the blank after sinter molding makes it to be formed the ferrite with spinel structure, and the temperature of sintering is between 1200 DEG C-1320 DEG C.
Certain above-mentioned ferrite of the present invention can be made into the various magnetic core being suitable for industrial application, and this can implement after those of ordinary skill in the art have learned Ferrite Material of the present invention, does not repeat them here.
In existing technology, additive adds when preparing burden, the present invention is interpolation after pre-burning operation completes, additive of the present invention not through burn-in process, so not in burn-in process with other substance reaction, add in this step and additive can be made to be evenly distributed in Ferrite Material.
Aforesaid method of the present invention is additive after main composition pre-burning completes, then ground and mixed, in sinter molding, additive of the present invention can be evenly distributed in ferrite matrix more like this, more easily form the ferrite particle of various different size structure, this makes ferrite of the present invention can the noise hertzian wave of wider, the better effects if of absorption frequency scope, thus expands the suction ripple scope of ferrite wave-absorbing material of the present invention and the performance of material.
Vibration step of the present invention usually can adopt vibrating ball mill vibration 5-20 minute or adopt the hybrid mode of other form, and its object is to make various main composition mix.
Remaining steps characteristic of the present invention all can adopt ferrite dry process, and these are all well known to those of ordinary skill in the art.The present inventor is preferred above-mentioned calcined temperature, contriver finds that said temperature is too high, and its ratio forming spinel structure is too high, the initial magnetic permeability of the magnetic core after sintering can be caused like this to decline, add milling time in addition, namely add cost; Said temperature is too low, and the ratio forming crystal grain is inadequate, in sintering process, not easily control the size of magnetic core, also easily deforms simultaneously.More preferably: the temperature of pre-burning is 960 DEG C.Contriver finds that said temperature point is an ideal calcined temperature, and the ratio forming crystal grain at this temperature spot is moderate, and process costs is best, and size and the distortion that can control again magnetic core in sintering process are little.
Embodiment 1
According to Fe 2o 3(purity>=99%) is 68wt%; ZnO (purity>=99.7%) is 19wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Ta of 0.05wt% (by Preburning material Weight computation) 2o 5additive, the Preburning material ball milling 15 hours in ball mill then will adding additive, mist projection granulating forms powder, by powder pressing forming, manufactures the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinters at 1280 DEG C and be incubated 2 hours.Obtain Ni-Zn series ferrite wave-absorbing material magnetic core and be numbered a.
Embodiment 2
According to Fe 2o 3(purity>=99%) is 68wt%; ZnO (purity>=99.7%) is 19wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 0.05wt% (by Preburning material Weight computation) 2o 5additive, the Preburning material ball milling 15 hours in ball mill then will adding additive, mist projection granulating forms powder, by powder pressing forming, manufactures the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinters at 1280 DEG C and be incubated 2 hours.Obtain Ni-Zn series ferrite wave-absorbing material magnetic core and be numbered b.
Embodiment 3
According to Fe 2o 3(purity>=99%) is 68wt%; ZnO (purity>=99.7%) is 19wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Ta of 2.0wt% (by Preburning material Weight computation) 2o 5additive, the Preburning material ball milling 15 hours in ball mill then will adding additive, mist projection granulating forms powder, by powder pressing forming, manufactures the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinters at 1280 DEG C and be incubated 2 hours.Obtain Ni-Zn series ferrite wave-absorbing material magnetic core and be numbered c.
Embodiment 4
According to Fe 2o 3(purity>=99%) is 68wt%; ZnO (purity>=99.7%) is 19wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 2.0wt% (by Preburning material Weight computation) 2o 5additive, the Preburning material ball milling 15 hours in ball mill then will adding additive, mist projection granulating forms powder, by powder pressing forming, manufactures the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinters at 1280 DEG C and be incubated 2 hours.Obtain Ni-Zn series ferrite wave-absorbing material magnetic core and be numbered d.
Embodiment 5
According to Fe 2o 3(purity>=99%) is 68wt%; ZnO (purity>=99.7%) is 19wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 0.025wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 0.025wt% (by Preburning material Weight computation) 2o 5additive, the Preburning material ball milling 15 hours in ball mill then will adding additive, mist projection granulating forms powder, by powder pressing forming, manufactures the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinters at 1280 DEG C and be incubated 2 hours.Obtain Ni-Zn series ferrite wave-absorbing material magnetic core and be numbered e.
Embodiment 6
According to Fe 2o 3(purity>=99%) is 68wt%; ZnO (purity>=99.7%) is 19wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 1.0wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 1.0wt% (by Preburning material Weight computation) 2o 5additive, the Preburning material ball milling 15 hours in ball mill then will adding additive, mist projection granulating forms powder, by powder pressing forming, manufactures the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinters at 1280 DEG C and be incubated 2 hours.Obtain Ni-Zn series ferrite wave-absorbing material magnetic core and be numbered f.
Each embodiment is got 10 magnetic cores and is tested, and get its minimum value, it the results are shown in table 1.The testing method of embodiment of the present invention magnetic core is well known to those of ordinary skill in the art, general testing method.
Comparative example nickel Zinc material is that the external diameter that common commercially available nickel-zinc-ferrite material is made is Φ 17.5, internal diameter is Φ 9.5, is highly the magnetic core of 28.5.It does not have additive.Results of property is as table 1:
Table 1 the performance test results
Sample Resistance value is surveyed in 25MHz frequency
a 159.5
b 158.1
c 157.3
d 156.4
e 158.2
f 158.9
Comparative sample 136.0
From table 1, ferrite of the present invention improves the absorbing property of material by adding additive, especially improve more than 15% at resistance value than the nickel-zinc ferrite not adding additive at 10MHz-100MHz, have well to noise electromaganic wave absorbing property in other range of frequency equally, made magnetic core is applicable to be assembled into the effect devices such as signal connecting line, electric wire, electronics played to noise absorption of electromagnetic wave.
Embodiment 7
According to Fe 2o 3(purity>=99%) is 64wt%; ZnO (purity>=99.7%) is 15wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 21wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 1.0wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 1.0wt% (by Preburning material Weight computation) 2o 5additive, then the Preburning material ball milling 15 hours in ball mill will adding additive, mist projection granulating forms powder, by powder pressing forming, manufacture the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinter at 1280 DEG C and be incubated 2 hours, obtaining Ni-Zn series ferrite wave-absorbing material magnetic core.
Embodiment 8
According to Fe 2o 3(purity>=99%) is 70wt%; ZnO (purity>=99.7%) is 15wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 15wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 1.0wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 1.0wt% (by Preburning material Weight computation) 2o 5additive, then the Preburning material ball milling 15 hours in ball mill will adding additive, mist projection granulating forms powder, by powder pressing forming, manufacture the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinter at 1280 DEG C and be incubated 2 hours, obtaining Ni-Zn series ferrite wave-absorbing material magnetic core.
Embodiment 9
According to Fe 2o 3(purity>=99%) is 64wt%; ZnO (purity>=99.7%) is 25wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 11wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 1.0wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 1.0wt% (by Preburning material Weight computation) 2o 5additive, then the Preburning material ball milling 15 hours in ball mill will adding additive, mist projection granulating forms powder, by powder pressing forming, manufacture the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinter at 1280 DEG C and be incubated 2 hours, obtaining Ni-Zn series ferrite wave-absorbing material magnetic core.
Embodiment 10
According to Fe 2o 3(purity>=99%) is 69wt%; ZnO (purity>=99.7%) is 25wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 6wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 1.0wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 1.0wt% (by Preburning material Weight computation) 2o 5additive, then the Preburning material ball milling 15 hours in ball mill will adding additive, mist projection granulating forms powder, by powder pressing forming, manufacture the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinter at 1280 DEG C and be incubated 2 hours, obtaining Ni-Zn series ferrite wave-absorbing material magnetic core.
Embodiment 11
According to Fe 2o 3(purity>=99%) is 67wt%; ZnO (purity>=99.7%) is 20wt%; Main composition material prepares by the formula that NiO (purity>=97.2%) is 13wt%, vibration 15 minutes in vibrating ball mill; Then pelletizing, pre-burning in rotary kiln, calcined temperature is 960 DEG C ± 10 DEG C these temperature 30 minutes, Preburning material burned is in advance added again the Nb of 1.0wt% (by Preburning material Weight computation) 2o 5additive and the Ta of 1.0wt% (by Preburning material Weight computation) 2o 5additive, then the Preburning material ball milling 15 hours in ball mill will adding additive, mist projection granulating forms powder, by powder pressing forming, manufacture the magnetic core of external diameter Φ 17.5, internal diameter Φ 9.5, height 28.5, sinter at 1280 DEG C and be incubated 2 hours, obtaining Ni-Zn series ferrite wave-absorbing material magnetic core.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. a Ni-Zn series ferrite wave-absorbing material magnetic core, is characterized in that, comprises main composition and additive, and described main composition is ferric oxide Fe 2o 3, zinc oxide ZnO, nickel protoxide NiO, described main composition in the weight percentage of respective standard substance is: Fe 2o 3be 6-21wt% for 64-70wt%, ZnO are 15-25wt%, NiO, wherein main component content amounts to weight percent is 100wt%; Described additive is tantalum pentoxide and/or niobium oxide.
2. Ni-Zn series ferrite wave-absorbing material magnetic core as claimed in claim 1, is characterized in that: the percentage composition that described additive weight accounts for main composition is: 0.05wt%-2wt%.
3. Ni-Zn series ferrite wave-absorbing material magnetic core as claimed in claim 1 or 2, is characterized in that: described tantalum additive is Ta 2o 5or the tantalum pentoxide of other form.
4. Ni-Zn series ferrite wave-absorbing material magnetic core as claimed in claim 1 or 2, is characterized in that: described niobium additive is Nb 2o 5or the niobium oxide of other form.
5. a manufacture method for Ni-Zn series ferrite wave-absorbing material magnetic core, is characterized in that, adopt as arbitrary in claim 1-4 as described in main composition and additive content proportioning preparation, comprise following steps:
S10, batching: the main composition getting described various ratio, is mixed to get main raw material;
S20, mixing: adopt vibration or alternate manner to be mixed by main raw material;
S30, pre-burning: the starting material mixed are carried out pre-burning;
S40, grinding: the additive adding described weight, in Preburning material, grinds after Homogeneous phase mixing;
S50, granulation: obtain Ni-Zn series ferrite wave-absorbing material powder;
S60, shaping: by Ni-Zn series ferrite wave-absorbing material powder pressing forming;
S70, sintering: the blank after sinter molding makes it to be formed the ferrite with spinel structure.
6. the manufacture method of Ni-Zn series ferrite wave-absorbing material powder according to claim 5, is characterized in that: described calcined temperature is 900 DEG C-1100 DEG C.
7., according to the manufacture method of the arbitrary described Ni-Zn series ferrite wave-absorbing material magnetic core of claim 5-6, it is characterized in that: described sintering temperature is 1200 DEG C-1320 DEG C.
CN201510821292.XA 2015-11-23 2015-11-23 NiZn series ferrite wave-absorbing material core and manufacturing method thereof Pending CN105272195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510821292.XA CN105272195A (en) 2015-11-23 2015-11-23 NiZn series ferrite wave-absorbing material core and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510821292.XA CN105272195A (en) 2015-11-23 2015-11-23 NiZn series ferrite wave-absorbing material core and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN105272195A true CN105272195A (en) 2016-01-27

Family

ID=55142118

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510821292.XA Pending CN105272195A (en) 2015-11-23 2015-11-23 NiZn series ferrite wave-absorbing material core and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN105272195A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110197743A (en) * 2019-03-18 2019-09-03 杭州电子科技大学 Power supply line and preparation method with electromagnetic wave absorption functions
CN114853461A (en) * 2022-06-20 2022-08-05 西安锐磁电子科技有限公司 Wide-temperature-range low-loss NiZn soft magnetic ferrite material and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101607816A (en) * 2009-07-15 2009-12-23 天通控股股份有限公司 Nickel ferrite for radio frequency range and preparation method thereof
CN102603279A (en) * 2012-03-07 2012-07-25 天通控股股份有限公司 High-strength high-Bs (saturation magnetic induction intensity) nickel-zinc ferrite and preparation method thereof
CN103956247A (en) * 2014-05-07 2014-07-30 湖州科富电子科技有限公司 High-frequency and low-attenuation magnetic material and production method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101607816A (en) * 2009-07-15 2009-12-23 天通控股股份有限公司 Nickel ferrite for radio frequency range and preparation method thereof
CN102603279A (en) * 2012-03-07 2012-07-25 天通控股股份有限公司 High-strength high-Bs (saturation magnetic induction intensity) nickel-zinc ferrite and preparation method thereof
CN103956247A (en) * 2014-05-07 2014-07-30 湖州科富电子科技有限公司 High-frequency and low-attenuation magnetic material and production method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110197743A (en) * 2019-03-18 2019-09-03 杭州电子科技大学 Power supply line and preparation method with electromagnetic wave absorption functions
CN114853461A (en) * 2022-06-20 2022-08-05 西安锐磁电子科技有限公司 Wide-temperature-range low-loss NiZn soft magnetic ferrite material and preparation method thereof

Similar Documents

Publication Publication Date Title
CN107129291B (en) With high frequency low-temperature coefficient low-loss MnZn soft magnetic ferrite and preparation method thereof
CN107311637B (en) A kind of method that low-power consumption manganese-zinc ferrite is prepared based on nucleocapsid crystal grain
CN103058643B (en) Mn-Zn soft magnetic ferrite material with high, temperature, high superposition and low power consumption, and preparation method of Mn-Zn soft magnetic ferrite material
CN100368341C (en) High magnetic permeability ferrite in manganese zinc series of having excellent frequency characteristic and preparation method
CN100353468C (en) Anti-interference magnesium-zinc ferrite and producing method
CN104072117A (en) Magnetoplumbite-type hexagonal ferrite
CN104446421A (en) High-magnetic conductivity nickel and zinc soft magnetic ferrite material and preparation method
CN104261812A (en) Anti-EMI (electromagnetic interference) ferrite material and preparation method thereof
CN101412622A (en) High-frequency nickel-copper-zinc ferrite and preparation thereof
CN110204325B (en) Ferrite material and preparation method thereof
KR101218998B1 (en) Magnetic material composition for ceramic electronic element, manufacturing method of the same, and an electronic element using the same
US5198138A (en) Spherical ferrite particles and ferrite resin composite for bonded magnetic core
CN105272194A (en) NiZn series ferrite wave-absorbing material formula and NiZn series ferrite wave-absorbing material powder and manufacturing method thereof
CN100519470C (en) Ferrite containing magnesium, zinc and copper element and its production method
TW200421360A (en) Electromagnetic wave absorber formed of Mn-Zn ferrite
CN105272195A (en) NiZn series ferrite wave-absorbing material core and manufacturing method thereof
CN104129980A (en) Low-sintering-temperature soft magnetic ferrite material and preparation method thereof
CN103956247A (en) High-frequency and low-attenuation magnetic material and production method thereof
JP5549063B2 (en) Ferrite material and method for producing ferrite material
CN100491569C (en) Magnesium-zine-series ferrite and preparing method
CN104291804A (en) Method for preparing wide-temperature magnesium-copper-zinc soft magnetic ferrite core
JP2016219643A (en) Composite magnetic body and high-frequency magnetic component using the same
US6858155B1 (en) Ferrite materials, methods of preparing the same, and products formed therefrom
CN103641464B (en) An anti-electromagnetic interference magnesium-zinc ferrite material and a preparation method thereof
JP7037434B2 (en) Heat resistance High magnetic permeability MnZn ferrite

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20160127

WD01 Invention patent application deemed withdrawn after publication