CN105439552A - Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method - Google Patents

Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method Download PDF

Info

Publication number
CN105439552A
CN105439552A CN201511018121.XA CN201511018121A CN105439552A CN 105439552 A CN105439552 A CN 105439552A CN 201511018121 A CN201511018121 A CN 201511018121A CN 105439552 A CN105439552 A CN 105439552A
Authority
CN
China
Prior art keywords
microwave magnetic
magnetic property
preparation
hours
pva
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
CN201511018121.XA
Other languages
Chinese (zh)
Inventor
杨海波
张戈
林营
朱建锋
王芬
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.)
Shaanxi University of Science and Technology
Original Assignee
Shaanxi University of Science and Technology
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 Shaanxi University of Science and Technology filed Critical Shaanxi University of Science and Technology
Priority to CN201511018121.XA priority Critical patent/CN105439552A/en
Publication of CN105439552A publication Critical patent/CN105439552A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)

Abstract

The invention provides a Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and a preparation method. According to a general chemical formula (1-x)Co2Z/xCo2Y, BaCO3, Co3O4 and Fe2O3 are prepared, ball-milled, dried, sieved and pressed into blocks, the blocks are presintered at 1,100-1,200 DEG C, ground and sieved by a 120-mesh sieve, and composite powder is obtained; a PVA (polyvinyl alcohol) binder is added to the composite powder, the mixture is granulated, sieved, subjected to compression forming and sintered, and the Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material is obtained. The prepared microwave magnetic material only contains two phases including Co2Y and Co2Z, other impure phases are absent, an electron microscopy test proves that the structure is compact and free of obvious pores, the permeability of the microwave magnetic material is 10-15, and the return loss can reach (-20) dB-(-40) dB.

Description

A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property and preparation method
Technical field
The invention belongs to material science, relate to a kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property and preparation method.
Background technology
Along with the development of modern science and technology, the impact of electromagenetic wave radiation on environment increases day by day.On airport, machine flight is overdue because Electromagnetic Interference cannot be taken off; The normal work of various electronic instrument for diagnosing and curing diseases device often can be disturbed at hospital, mobile telephone.Therefore, administer electromagnetic pollution, find and a kind ofly can keep out and weaken material---the absorbing material of electromagenetic wave radiation, become a large problem of Materials science.Electromagnetic radiation to be caused human body by heat effect, non-thermal effect, storage effect and directly and indirectly injures.Research confirms, ferrite wave-absorbing material performance is best, and it has the features such as absorption frequency range is high, specific absorption is high, matching thickness is thin.By the electromagnetic radiation that Absorbable rod is revealed in electronics of this materials application, the object eliminating electromagnetic interference can be reached.According to hertzian wave in media as well from the rule that low magnetic steering high magnetic conductance direction is propagated, utilize high magnetic conductivity ferrite guide electromagnetic waves, by resonance, the quantity of radiant energy of a large amount of electromagnetic wave absorption, then by coupling, electromagnetic energy conversion is become heat energy.Co 2z (Ba 3co 2fe 24o 41) type soft magnetic ferrite is with its excellent performance such as initial permeability is high when VHF band (300MH ~ 1GHz) uses, quality factor are high, thermostability is high, loss is low, and the limiting frequency of Theoretical Calculation this Ferrite Material known up to 3.7GHz, therefore can make Co 2z ferrite becomes a kind of soft magnetic ferrite in high frequency electromagnetism interference EMI element with better application prospect.Co 2y (Ba 2co 2fe 12o 22) natural resonant frequency of type ferrite compares Co 2z is higher, and thus its frequency of utilization is higher.But in conventional solid sintering, be difficult to obtain the very high Co of purity 2z and Co 2y, two-phase due to structure similar with preparation condition, thus containing preparation pure phase Co 2miscellaneous Co is contained during Z 2y, and at preparation pure phase Co 2miscellaneous Co is contained during Y 2z.
Summary of the invention
The object of the present invention is to provide a kind of Ba with excellent electromagnetism and absorbing property 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property and preparation method, the magnetic permeability of this microwave magnetic property reaches 10 ~ 15, and reflection loss can reach-20dB ~-42dB, and the preparation method of this microwave magnetic property reduces Co 2z and Co 2the technology difficulty of Y type microwave magnetic property.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property, structural formula is: (1-x) Co 2z/xCo 2y, wherein, 0.1≤x≤0.7.
X=0.1,0.3,0.5 or 0.7.
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by BaCO 3, Co 3o 4, Fe 2o 3ball milling 2 ~ 4 hours after preparation, then dries, sieves, briquetting, through 1100 DEG C ~ 1200 DEG C pre-burnings 4 ~ 6 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, 0.1≤x≤0.7;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder;
3) by mixed powder compression moulding, then get rid of binder PVA, then at 1200 ~ 1250 DEG C, sinter 2 ~ 4 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
X=0.1,0.3,0.5 or 0.7.
Described step 1) in sieve to be specially and sieve through 60 orders and 120 eye mesh screens.
Described step 1) middle BaCO 3, Co 3o 4, Fe 2o 3be analytical pure.
Described step 2) in the add-on of PVA tackiness agent be 8% ~ 15% of composite granule quality.
Described step 2) in PVA tackiness agent be the polyvinyl alcohol water solution of mass concentration 10%.
Described step 3) in get rid of the condition of binder PVA and be: at 500 DEG C ~ 550 DEG C, be incubated 4 ~ 6 hours.
Compared with prior art, the beneficial effect that has of the present invention: the present invention adopts BaCO 3, Co 3o 4, Fe 2o 3for raw material, obtain composite granule by pre-burning, then sieve after composite granule is carried out granulation, after compression moulding, sintering obtains Ba again 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property, only containing Co in the microwave magnetic property that the present invention obtains 2y and Co 2z two-phase, exists without other dephasign, and shows compact structure by Electronic Speculum test, does not have obvious pore.With the Co of preparation pure phase of the prior art 2z and Co 2the method of Y is compared, there is the simple advantage of preparation technology, the microwave magnetic property that simultaneously the present invention obtains has high magnetic permeability and magnetic loss and outstanding microwave absorbing property, the magnetic permeability of this microwave magnetic property reaches 10 ~ 15, reflection loss can reach-20dB ~-42dB, and the preparation method of this matrix material reduces Co 2z and Co 2the technology difficulty of Y type microwave magnetic property, preparation method is simple, is beneficial to realization.
Accompanying drawing explanation
Fig. 1 is for work as Co 2the mol ratio of Y is 0.1, Co 2the XRD figure of microwave magnetic property when the mol ratio of Z is 0.9.
Fig. 2 is for work as Co 2the mol ratio of Y is 0.3, Co 2the XRD figure of microwave magnetic property when the mol ratio of Z is 0.7.
Fig. 3 is for work as Co 2the mol ratio of Y is 0.5, Co 2the XRD figure of microwave magnetic property when the mol ratio of Z is 0.5.
Fig. 4 is for work as Co 2the mol ratio of Y is 0.7, Co 2the XRD figure of microwave magnetic property when the mol ratio of Z is 0.3.
Fig. 5 is for work as Co 2the mol ratio of Y is 0.1, Co 2the SEM figure of microwave magnetic property when the mol ratio of Z is 0.9.
Fig. 6 is for work as Co 2the mol ratio of Y is 0.3, Co 2the SEM figure of microwave magnetic property when the mol ratio of Z is 0.7.
Fig. 7 is for work as Co 2the mol ratio of Y is 0.5, Co 2the SEM figure of microwave magnetic property when the mol ratio of Z is 0.5.
Fig. 8 is for work as Co 2the mol ratio of Y is 0.7, Co 2the SEM figure of microwave magnetic property when the mol ratio of Z is 0.3.
Fig. 9 is for work as Co 2the mol ratio of Y is 0.1, Co 2the magnetic permeability figure of microwave magnetic property when the mol ratio of Z is 0.9.
Figure 10 is for work as Co 2the mol ratio of Y is 0.3, Co 2the magnetic permeability figure of microwave magnetic property when the mol ratio of Z is 0.7.
Figure 11 is for work as Co 2the mol ratio of Y is 0.5, Co 2the magnetic permeability figure of microwave magnetic property when the mol ratio of Z is 0.5.
Figure 12 is for work as Co 2the mol ratio of Y is 0.7, Co 2the magnetic permeability figure of microwave magnetic property when the mol ratio of Z is 0.3.
Figure 13 is for work as Co 2the mol ratio of Y is 0.5, Co 2when the mol ratio of Z is 0.5, the thickness of microwave magnetic property is the absorbing property figure of 2mm.
Figure 14 is for work as Co 2the mol ratio of Y is 0.5, Co 2when the mol ratio of Z is 0.5, the thickness of microwave magnetic property is the absorbing property figure of 3mm.
Figure 15 is for work as Co 2the mol ratio of Y is 0.5, Co 2when the mol ratio of Z is 0.5, the thickness of microwave magnetic property is the absorbing property figure of 4mm.
Figure 16 is for work as Co 2the mol ratio of Y is 0.5, Co 2when the mol ratio of Z is 0.5, the thickness of microwave magnetic property is the absorbing property figure of 5mm.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
The present invention gets the test of the carrying out of different thickness to microwave magnetic property.
Embodiment 1
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.1.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 4 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1100 DEG C of pre-burnings 4 ~ 6 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.1;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 8% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 500 DEG C, be incubated 4 hours and get rid of binder PVA, then at 1250 DEG C, sinter 2 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
As seen from Figure 1, only Co is contained in matrix material 2y and Co 2z two-phase, exists without other dephasign.
As seen from Figure 5, composite structure is fine and close, does not have obvious pore.
As seen from Figure 9, matrix material magnetic permeability reaches 10.
As seen from Figure 13, have obvious absorption peak when 3 ~ 10 Gigahertz, reflection loss is-29dB to the maximum.
Embodiment 2
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.3.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 2 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1100 DEG C of pre-burnings 4 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.3;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 10% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 550 DEG C, be incubated 4 hours and get rid of binder PVA, then at 1250 DEG C, sinter 2 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
As seen from Figure 2, only Co is contained in matrix material 2y and Co 2z two-phase, exists without other dephasign.
As seen from Figure 6, composite structure is fine and close, does not have obvious pore.
As seen from Figure 10, matrix material magnetic permeability reaches 15.
As seen from Figure 14, have obvious absorption peak when 3 ~ 10 and 15 ~ 20 Gigahertz, reflection loss is-41dB to the maximum.
Embodiment 3
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.5.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 3 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1100 DEG C of pre-burnings 4 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.5;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 12% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 520 DEG C, be incubated 4 hours and get rid of binder PVA, then at 1250 DEG C, sinter 2 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
As seen from Figure 3, only Co is contained in matrix material 2y and Co 2z two-phase, exists without other dephasign.
As seen from Figure 7, composite structure is fine and close, does not have obvious pore.
As seen from Figure 11, matrix material magnetic permeability reaches 15.
As seen from Figure 15, have obvious absorption peak when 3 ~ 10 and 15 ~ 20 Gigahertz, reflection loss is-32dB to the maximum.
Embodiment 4
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.7.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 2 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1100 DEG C of pre-burnings 4 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.7;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 15% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 530 DEG C, be incubated 4 hours and get rid of binder PVA, then at 1250 DEG C, sinter 2 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
As seen from Figure 4, only Co is contained in matrix material 2y and Co 2z two-phase, exists without other dephasign.
As seen from Figure 8, composite structure is fine and close, does not have obvious pore.
As seen from Figure 12, matrix material magnetic permeability reaches 10.
As seen from Figure 16, have obvious absorption peak when 3 ~ 20 Gigahertz, reflection loss is-20dB to the maximum.
Embodiment 5
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.4.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 2.5 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1200 DEG C of pre-burnings 6 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.4;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 13% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 540 DEG C, be incubated 4 hours and get rid of binder PVA, then at 1200 DEG C, sinter 4 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
Embodiment 6
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.6.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 3.5 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1150 DEG C of pre-burnings 5.5 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.6;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 9% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 510 DEG C, be incubated 5 hours and get rid of binder PVA, then at 1230 DEG C, sinter 3 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
Embodiment 7
A kind of Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the structural formula of microwave magnetic property is: (1-x) Co 2z/xCo 2y, wherein, x=0.2.
Above-mentioned Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by analytically pure BaCO 3, Co 3o 4, Fe 2o 3after preparation, ball milling 4 hours, then dries, sieves (sieve to be specially and sieve through 60 orders and 120 eye mesh screens), briquetting, through 1130 DEG C of pre-burnings 4.5 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, x=0.2;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder; Wherein, the add-on of PVA tackiness agent is 11% of composite granule quality; PVA tackiness agent is the polyvinyl alcohol water solution of mass concentration 10%.
3) by mixed powder compression moulding, then at 500 DEG C, be incubated 6 hours and get rid of binder PVA, then at 1220 DEG C, sinter 3.5 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.

Claims (9)

1. a Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property, is characterized in that, structural formula is: (1-x) Co 2z/xCo 2y, wherein, 0.1≤x≤0.7.
2. a kind of Ba according to claim 1 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property, is characterized in that, x=0.1,0.3,0.5 or 0.7.
3. a Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, comprises the following steps:
1) by chemical general formula (1-x) Co 2z/xCo 2y, by BaCO 3, Co 3o 4, Fe 2o 3ball milling 2 ~ 4 hours after preparation, then dries, sieves, briquetting, through 1100 DEG C ~ 1200 DEG C pre-burnings 4 ~ 6 hours, obtains bulk sample, crosses 120 mesh sieves and obtain composite granule after then being pulverized by bulk sample; Wherein, 0.1≤x≤0.7;
2) in composite granule, add PVA tackiness agent, sieve through 60 orders and 120 eye mesh screens after granulation, obtain mixed powder;
3) by mixed powder compression moulding, then get rid of binder PVA, then at 1200 ~ 1250 DEG C, sinter 2 ~ 4 hours one-tenth porcelain, obtain Ba 3co 2fe 24o 41/ Ba 2co 2fe 12o 22microwave magnetic property.
4. a kind of Ba according to claim 3 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, x=0.1,0.3,0.5 or 0.7.
5. a kind of Ba according to claim 3 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, described step 1) in sieve to be specially and sieve through 60 orders and 120 eye mesh screens.
6. a kind of Ba according to claim 3 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, described step 1) middle BaCO 3, Co 3o 4, Fe 2o 3be analytical pure.
7. a kind of Ba according to claim 3 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, described step 2) in the add-on of PVA tackiness agent be 8% ~ 15% of composite granule quality.
8. a kind of Ba according to claim 3 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, described step 2) in PVA tackiness agent be the polyvinyl alcohol water solution of mass concentration 10%.
9. a kind of Ba according to claim 3 3co 2fe 24o 41/ Ba 2co 2fe 12o 22the preparation method of microwave magnetic property, is characterized in that, described step 3) in get rid of the condition of binder PVA and be: at 500 DEG C ~ 550 DEG C, be incubated 4 ~ 6 hours.
CN201511018121.XA 2015-12-29 2015-12-29 Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method Pending CN105439552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201511018121.XA CN105439552A (en) 2015-12-29 2015-12-29 Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201511018121.XA CN105439552A (en) 2015-12-29 2015-12-29 Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method

Publications (1)

Publication Number Publication Date
CN105439552A true CN105439552A (en) 2016-03-30

Family

ID=55550261

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201511018121.XA Pending CN105439552A (en) 2015-12-29 2015-12-29 Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method

Country Status (1)

Country Link
CN (1) CN105439552A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111333416A (en) * 2020-03-02 2020-06-26 江西重恒工瓷科技有限公司 NFC ferrite magnetic shielding material and preparation method thereof
CN112142456A (en) * 2020-09-04 2020-12-29 湖南航天磁电有限责任公司 Ferrite wave-absorbing material and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1380663A (en) * 2001-04-09 2002-11-20 户田工业株式会社 Soft magnetic hexagonal ferrite compound particle and porous plate and sintering ceramics
CN1405799A (en) * 2001-08-27 2003-03-26 株式会社村田制作所 High-frequency magenetic material and high-frequency circuit component using said material
CN103242037A (en) * 2013-05-13 2013-08-14 电子科技大学 Hexagonal ferrite material with high magnetic loss in L wave band and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1380663A (en) * 2001-04-09 2002-11-20 户田工业株式会社 Soft magnetic hexagonal ferrite compound particle and porous plate and sintering ceramics
CN1405799A (en) * 2001-08-27 2003-03-26 株式会社村田制作所 High-frequency magenetic material and high-frequency circuit component using said material
CN103242037A (en) * 2013-05-13 2013-08-14 电子科技大学 Hexagonal ferrite material with high magnetic loss in L wave band and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHIJUAN SU ET AL.: ""Tunable permittivity and permeability of low loss Z+Y-type ferrite composites for ultra-high frequency applications"", 《JOURNAL OF APPLIED PHYSICS》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111333416A (en) * 2020-03-02 2020-06-26 江西重恒工瓷科技有限公司 NFC ferrite magnetic shielding material and preparation method thereof
CN111333416B (en) * 2020-03-02 2021-11-23 江西重恒工瓷科技有限公司 NFC ferrite magnetic shielding material and preparation method thereof
CN112142456A (en) * 2020-09-04 2020-12-29 湖南航天磁电有限责任公司 Ferrite wave-absorbing material and preparation method thereof

Similar Documents

Publication Publication Date Title
Sugimoto et al. M-type ferrite composite as a microwave absorber with wide bandwidth in the GHz range
CN105820796A (en) Preparation method of magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material
CN109054742B (en) Fe-Co-RGO composite wave-absorbing material and preparation method thereof
CN101913850A (en) Preparation method of high-magnetic-conductivity low-temperature-sintering Z-shaped hexagonal ferrite material
CN104692795B (en) A kind of ultra-low loss magnesium titanate lithium microwave dielectric ceramic materials and preparation method thereof
CN109233741A (en) A kind of preparation method of three-dimensional carbon network load cobalt ferrite nano-particles reinforcement wave absorbing agent
CN107051343A (en) The preparation method of the sour nickel@ferriferrous oxide composite materials of the carbon@cobalts of multi-layer core-shell structure
Darwish et al. Can hexaferrite composites be used as a new artificial material for antenna applications?
Chen et al. A low loss NiZnCo ferrite, prepared using a hydrothermal method, for antenna applications
CN101800107B (en) Anisotropic Z-type hexagonal ferrite and antenna using same
CN102850045B (en) Ferrite composite material with giant dielectric constant and high magnetic intensity and preparation method of ferrite composite material
CN103011792B (en) Method for preparing millimeter waveband electromagnetic wave absorbing agent
CN102153338A (en) Seepage type barium titanate-nickel zinc ferrite composite ceramic wave absorption material and preparation method thereof
CN105439552A (en) Ba3Co2Fe24O41/Ba2Co2Fe12O22 microwave magnetic material and preparation method
CN103467082A (en) W-type ferrite absorbent for millimeter waves
CN102503393B (en) Method for preparing high-performance ferrite material with microwave sintering method
CN113045304A (en) Ferrite wave-absorbing material with mixed spinel structure and preparation method thereof
Xu et al. Characterization of a Y-type hexagonal ferrite-based frequency tunable microwave absorber
CN108424134B (en) Garnet type solid solution magneto-dielectric functional dielectric ceramic material and preparation method thereof
CN102875129A (en) Spinel type solid solution medium ceramics materials with magnetic-dielectric functions and preparation method thereof
CN113573561B (en) Perovskite type electromagnetic wave absorption material and preparation method thereof
CN104402417B (en) Rare earth ReCrO3electromagnetic wave absorbing material and preparation method thereof
CN115084870A (en) Soft magnetic ferrite wave-absorbing material, preparation method thereof and composite wave-absorbing material
CN108394938A (en) A kind of pros' bodily form strontium ferrite wave absorbing agent and preparation method thereof
Meng et al. NiFe2O4/coal-based carbon composites with magnetic properties and microwave absorption capacity prepared through microwave radiation and hydrothermal reaction

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: 20160330

WD01 Invention patent application deemed withdrawn after publication