CN104591723A - Layered magnetoelectric composite material and preparation method thereof - Google Patents

Layered magnetoelectric composite material and preparation method thereof Download PDF

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CN104591723A
CN104591723A CN201510018270.XA CN201510018270A CN104591723A CN 104591723 A CN104591723 A CN 104591723A CN 201510018270 A CN201510018270 A CN 201510018270A CN 104591723 A CN104591723 A CN 104591723A
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powder
biy
matrix material
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杨海波
张戈
林营
朱建锋
王芬
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Shaanxi University of Science and Technology
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Shaanxi University of Science and Technology
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Abstract

The invention discloses a layered magnetoelectric composite material and preparation method thereof. The chemical general formula of the layered magnetoelectric composite material is xBiY2Fe5O12/(1-x)0.35BaTiO3-0.65BiFeO3, wherein x is the mass percent of BiY2Fe5O12, x is not less than 11.1% and not more than 33.3%; the preparation method comprises the following steps: carrying out compression molding on 0.35BaTiO3-0.65BiFeO3 and BiY2Fe5O12 powder in a mold according to 2-2 composite layer-stacking overlaying arrangement mode; removing PVA adhesive, and then sintering for 2-4 hours at 1000-1050 DEG.C to form porcelain. By adopting the 2-2 composite layer-stacking overlaying arrangement mode, the ferroelectric and ferromagnetic phases are sintered together in a layered composite mode, the interreaction between two phases can be effectively inhibited, the respective characteristic is maintained, so that the finally prepared layered magnetoelectric composite material has good ferroelectricity as well as good ferromagnetism.

Description

A kind of layered electromagnetic matrix material and preparation method thereof
Technical field
The invention belongs to material science, relate to a kind of layered electromagnetic matrix material and preparation method thereof.
Background technology
Along with the high speed development of information technology, traditional memory module constantly runs into the impact of all kinds of new technology and novel material.The miniaturization of memory device, multifunction are the trends of the times of its design and development.Therefore, to there is magnetic polarization and electropolarization and the research that can realize the multi-ferroic material that magnetoelectricity regulates and controls mutually becomes the needs that information storage technology promotes increasingly simultaneously, design for multifunction electronic information recording device of future generation is provided an extra degree of freedom by such material, greatly widen the range of application of ferroic material, thus there is important scientific meaning and application prospect.Therefore, the microminiaturization and the miniaturization that comprise the components and parts of ferroelectric dielectric materials and magneticsubstance are inexorable trends, and the magnetic electric compound material integrating ferroelectricity and ferromagnetism has identical volume can have more function on circuit.
Magnetic electric compound material is divided into 0-3 type magnetic electric compound material and 2-2 type magnetic electric compound material.0-3 type magnetic electric compound material be by discontinuous ferroelectric phase (ferromagnetic phase) Granular composite in the ferromagnetic phase (ferroelectric phase) of three-dimensional communication, mix according to a certain percentage, solid state sintering at a certain temperature, thus the particle magnetic electric compound material obtained.This kind of structure is simple, be study the earliest, a most widely used type.But because piezoelectric phase (ferromagnetic phase) exists the uneven problem of dispersion in ferromagnetic (piezoelectricity) matrix, thus the material magnetoelectric voltage coefficient of this kind of structure type is lower.2-2 type magnetic electric compound material makes it be total to the magnetic electric compound material together with burning with ferromagnetic phase powder according to the mode that barrier layer superposes ferroelectric phase powder.This kind of structure can adjust the content of pressure magnetic phase in a big way, so magnetoelectric voltage coefficient is greatly improved.Because ferroelectric phase layer that resistivity is very high can block the connection of Magnetic Phase layer completely, make the leakage current of material monolithic less, be conducive to the raising of material magnetic electricity performance.
Holland Philips laboratory is first the CoFe of ferromagnetic phase 2o 4with the BaTiO of ferroelectric phase 3powder mixes according to a certain percentage, and then heating up makes it congruent melting In-situ reaction, is finally cooled to the room temperature sosoloid that just to obtain with magnetoelectricity complex body be main component by certain speed.This method temperature is too high, easily produces some unpredictable phases, reduces the performance of matrix material.
Summary of the invention
For overcoming the problems of the prior art, the object of the present invention is to provide a kind of layered electromagnetic matrix material and preparation method thereof, the method can prepare ferroelectric, dielectric, magnetic electricity performance excellence magnetic electric compound material.
For achieving the above object, the present invention adopts following technical scheme:
A kind of layered electromagnetic matrix material, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and 11.1%≤x≤33.3%.
The chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and 22.2%≤x≤33.3%.
The chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=22.2%.
A preparation method for layered electromagnetic matrix material, comprises the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3mixed by ball milling after preparation, then sieve, briquetting, within 4 ~ 6 hours, obtain bulk product through 880 ~ 920 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3mixed by ball milling after preparation, then sieve, briquetting, through 1000 ~ 1020 DEG C of pre-burnings 4 ~ 6 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 3add granulation after PVA tackiness agent in powder, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12add granulation after PVA tackiness agent in powder, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder;
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and 11.1%≤x≤33.3%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound;
(5) at 1000 ~ 1050 DEG C, sinter 2 ~ 4 hours again after getting rid of PVA tackiness agent and become porcelain, obtain layered electromagnetic matrix material.
In described step (1), step (2), the time of ball milling is 4-6 hour.
To 0.35BaTiO in described step (3) 3-0.65BiFeO 3the quality adding PVA tackiness agent in powder is 0.35BaTiO 3-0.65BiFeO 38% ~ 15% of powder quality; To BiY 2fe 5o 12the quality adding PVA tackiness agent in powder is BiY 2fe 5o 128% ~ 15% of powder quality profit.
In described step (3), PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
The barrier layer of the middle 2-2 compound of described step (4) is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder, BiY 2fe 5o 12powder, 0.35BaTiO 3-0.65BiFeO 3the order of powder stacks together; Or according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder, BiY 2fe 5o 12powder, 0.35BaTiO 3-0.65BiFeO 3powder, BiY 2fe 5o 12powder, 0.35BaTiO 3-0.65BiFeO 3pVA tackiness agent is got rid of specifically: at temperature is 550-600 DEG C, be incubated 3-5 hour described in powder.
Compared with prior art, the beneficial effect that has of the present invention:
The present invention passes through with BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3for 0.35BaTiO prepared by raw material 3-0.65BiFeO 3powder, with Bi 2o 3, Y 2o 3, Fe 2o 3for raw material obtains BiY 2fe 5o 12powder, the barrier layer of 2-2 compound is adopted to be arranged under the overlay mode, ferroelectric-ferromagnetic is burnt together altogether in the mode of lamellar composite, can effectively suppress reacting to each other between two-phase, thus keep respective characteristic, make the layered electromagnetic matrix material of final preparation not only have good ferroelectricity but also have good ferromegnetism, overcome in prior art owing to adopting the method for directly mixing, produce unpredictable phase at relatively high temperatures, thus reduce the problem of composite property.
The magnetic electric compound material that the present invention obtains has excellent ferroelectric, dielectric and magnetic electricity performance.When frequency is 20 hertz, matrix material specific inductivity is 560 ~ 900, and dielectric loss is 0.16 ~ 0.21.The saturated polarization P of each component of matrix material sbe 30.2 ~ 40.2 μ C/cm 2, coercive field E cbe 20.2 ~ 20.8kV/cm, its saturation magnetization M sbe 2.2 ~ 4.5emu/g, coercive field H cbe 67.5 ~ 100.5Oe.
In addition, owing to there is not lead in the raw material that the present invention adopts, so preparation method can not pollute, by 0.35BaTiO 3-0.65BiFeO 3powder and BiY 2fe 5o 12powder is arranged under the overlay mode according to the barrier layer of 2-2 compound and is sintered together, and does not need tackiness agent between layers, and thus the transmission of stress-strain can efficiently directly complete.The material compactness that the present invention obtains is good, exist without obvious gross blow hole, two-phase even grain size, all at systems, without obvious interface atoms diffusion phenomena, interface coupling is better, so the present invention can ensure magnetic electric compound material directly efficient magnetic-electricity-Li efficiency of conversion, thus improves the magnetoelectricity conversion performance of matrix material.
Accompanying drawing explanation
Fig. 1 is x BiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=11.1%, the structure iron of composite ceramics when 1050 DEG C of sintering.
Fig. 2 is x BiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=22.2%, the structure iron of composite ceramics when 1050 DEG C of sintering.
Fig. 3 is x BiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=33.3%, the structure iron of composite ceramics when 1050 DEG C of sintering.
Fig. 4 is x BiY under room temperature 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=11.1%, composite ceramics is at the SEM figure of 1050 DEG C of sintering rear interfaces.
Fig. 5 is x BiY under room temperature 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=22.2%, composite ceramics is at the SEM figure of 1050 DEG C of sintering rear interfaces.
Fig. 6 is x BiY under room temperature 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=33.3%, composite ceramics is at the SEM figure of 1050 DEG C of sintering rear interfaces.
Fig. 7 is x BiY under room temperature 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=11.1%, the dielectric and magnetic of composite ceramics after 1050 DEG C of sintering.
Fig. 8 is x BiY under room temperature 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=22.2%, the dielectric and magnetic of composite ceramics after 1050 DEG C of sintering.
Fig. 9 is x BiY under room temperature 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=33.3%, the dielectric and magnetic of composite ceramics after 1050 DEG C of sintering.
Figure 10 is the ceramic x BiY at 1050 DEG C of sintering 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3ferroelectric hysteresis loop in component during x=11.1%.
Figure 11 is the ceramic x BiY at 1050 DEG C of sintering 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3ferroelectric hysteresis loop in component during x=22.2%.
Figure 12 is the ceramic x BiY at 1050 DEG C of sintering 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3ferroelectric hysteresis loop in component during x=33.3%.
Figure 13 is the ceramic x BiY at 1050 DEG C of sintering 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3the magnetic hysteresis loop of x=11.1% in component.
Figure 14 is the ceramic x BiY at 1050 DEG C of sintering 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3the magnetic hysteresis loop of x=22.2% in component.
Figure 15 is the ceramic x BiY at 1050 DEG C of sintering 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3the magnetic hysteresis loop of x=33.3% in component.
In figure, 1 is 0.35BaTiO 3-0.65BiFeO 3, 2 is BiY 2fe 5o 12powder.
Specific embodiment mode
Below in conjunction with accompanying drawing, by embodiment, the present invention is described in detail.
Embodiment 1
A kind of layered electromagnetic matrix material, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=11.1%.
The preparation method of above-mentioned layered electromagnetic matrix material, comprises the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3within 4 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, within 6 hours, obtain bulk product through 880 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3within 6 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, through 1020 DEG C of pre-burnings 4 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 30.35BaTiO is added in powder 3-0.65BiFeO 3granulation after the PVA tackiness agent of powder quality 8%, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12biY is added in powder 2fe 5o 12granulation after the PVA tackiness agent of powder quality 8%, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder; Wherein, PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=11.1%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound; Wherein, the barrier layer of 2-2 compound is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder 1, BiY 2fe 5o 12powder 2,0.35BaTiO 3-0.65BiFeO 3the order of powder 1 stacks together;
(5) at temperature is 550 DEG C, is incubated 3 hours at 1050 DEG C, sinters 2 hours one-tenth porcelain again after eliminating PVA tackiness agent, obtain layered electromagnetic matrix material.
Fig. 1 is x BiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=11.1%, the structure iron of composite ceramics when 1050 DEG C of sintering.
From figure, 4 can find out, good in the material compactness of 1050 DEG C of sintering, exist, two-phase even grain size, all at systems, without obvious interface atoms diffusion phenomena without obvious gross blow hole.
As seen from Figure 7, matrix material has larger specific inductivity, and when 20 hertz, specific inductivity is 900, and dielectric loss is 0.21.
As seen from Figure 10, matrix material has obvious ferroelectricity, and saturated polarization is 40.2 μ C/cm 2, coercive field is 20.2kV/cm.
As seen from Figure 13, matrix material has obvious ferromegnetism, and saturation magnetization is 2.2emu/g, and coercive field is 67.5Oe.
Embodiment 2
A kind of layered electromagnetic matrix material, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=22.2%.
The preparation method of above-mentioned layered electromagnetic matrix material, comprises the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3within 5 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, within 4 hours, obtain bulk product through 920 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3within 5 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, through 1000 DEG C of pre-burnings 6 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 30.35BaTiO is added in powder 3-0.65BiFeO 3granulation after the PVA tackiness agent of powder quality 15%, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12biY is added in powder 2fe 5o 12granulation after the PVA tackiness agent of powder quality 15%, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder; Wherein, PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=22.2%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound; Wherein, the barrier layer of 2-2 compound is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder 1, BiY 2fe 5o 12powder 2,0.35BaTiO 3-0.65BiFeO 3powder 2, BiY 2fe 5o 12powder 2,0.35BaTiO 3-0.65BiFeO 3the order of powder 1 stacks together.
(5) at temperature is 580 DEG C, is incubated 4 hours at 1050 DEG C, sinters 3 hours one-tenth porcelain again after eliminating PVA tackiness agent, obtain layered electromagnetic matrix material.
Fig. 2 is x BiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=22.2%, the structure iron of composite ceramics when 1050 DEG C of sintering.
From figure, 5 can find out, good in the material compactness of 1050 DEG C of sintering, exist, two-phase even grain size, all at systems, without obvious interface atoms diffusion phenomena without obvious gross blow hole.
As seen from Figure 8, matrix material has larger specific inductivity, and when 20 hertz, specific inductivity is 560, and dielectric loss is 0.17.
As seen from Figure 11, matrix material has obvious ferroelectricity, and saturated polarization is 38.5 μ C/cm 2, coercive field is 20.5kV/cm.
As seen from Figure 14, matrix material has obvious ferromegnetism, and saturation magnetization is 3.2emu/g, and coercive field is 84.3Oe.
Embodiment 3
A kind of layered electromagnetic matrix material, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=33.3%.
The preparation method of above-mentioned layered electromagnetic matrix material, comprises the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3within 6 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, within 5 hours, obtain bulk product through 900 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3within 4 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, through 1010 DEG C of pre-burnings 5 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 30.35BaTiO is added in powder 3-0.65BiFeO 3granulation after the PVA tackiness agent of powder quality 12%, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12biY is added in powder 2fe 5o 12granulation after the PVA tackiness agent of powder quality 12%, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder; Wherein, PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=33.3%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound; Wherein, the barrier layer of 2-2 compound is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder 1, BiY 2fe 5o 12powder 2,0.35BaTiO 3-0.65BiFeO 3the order of powder 1 stacks together;
(5) at temperature is 600 DEG C, is incubated 5 hours at 1050 DEG C, sinters 4 hours one-tenth porcelain again after eliminating PVA tackiness agent, obtain layered electromagnetic matrix material.
Fig. 3 is x BiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3in component as x=33.3%, the structure iron of composite ceramics when 1050 DEG C of sintering.
From figure, 6 can find out, good in the material compactness of 1050 DEG C of sintering, exist, two-phase even grain size, all at systems, without obvious interface atoms diffusion phenomena without obvious gross blow hole.
As seen from Figure 9, matrix material has larger specific inductivity, and when 20 hertz, specific inductivity is 560, and dielectric loss is 0.16.
As seen from Figure 12, matrix material has obvious ferroelectricity, and saturated polarization is 30.2 μ C/cm 2, coercive field is 20.8kV/cm.
As seen from Figure 15, matrix material has obvious ferromegnetism, and saturation magnetization is 4.5emu/g, and coercive field is 100.5Oe.
Embodiment 4
A kind of layered electromagnetic matrix material, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=15%.
The preparation method of above-mentioned layered electromagnetic matrix material, comprises the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3within 4.5 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, within 5 hours, obtain bulk product through 890 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3within 5.5 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, through 1005 DEG C of pre-burnings 5 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 30.35BaTiO is added in powder 3-0.65BiFeO 3granulation after the PVA tackiness agent of powder quality 8%, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12biY is added in powder 2fe 5o 12granulation after the PVA tackiness agent of powder quality 8%, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder; Wherein, PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=15%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound; Wherein, the barrier layer of 2-2 compound is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder 1, BiY 2fe 5o 12powder 2,0.35BaTiO 3-0.65BiFeO 3the order of powder 1 stacks together;
(5) at temperature is 560 DEG C, is incubated 4.5 hours at 1025 DEG C, sinters 2.5 hours one-tenth porcelain again after eliminating PVA tackiness agent, obtain layered electromagnetic matrix material.
Embodiment 5
A kind of layered electromagnetic matrix material, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=25%.
The preparation method of above-mentioned layered electromagnetic matrix material, comprises the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3within 6 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, within 4.5 hours, obtain bulk product through 900 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3within 4 hours, mixed by wet ball grinding after preparation, then dry, sieve, briquetting, through 1000 DEG C of pre-burnings 5.5 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 3add granulation after PVA tackiness agent in powder, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12add granulation after PVA tackiness agent in powder, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder; Wherein, PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=11.1%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound; Wherein, the barrier layer of 2-2 compound is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder 1, BiY 2fe 5o 12powder 2,0.35BaTiO 3-0.65BiFeO 3the order of powder 1 stacks together;
(5) at temperature is 590 DEG C, is incubated 3 hours at 1000 DEG C, sinters 3.5 hours one-tenth porcelain again after eliminating PVA tackiness agent, obtain layered electromagnetic matrix material.

Claims (9)

1. a layered electromagnetic matrix material, is characterized in that, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and 11.1%≤x≤33.3%.
2. layered electromagnetic matrix material according to claim 1, is characterized in that, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and 22.2%≤x≤33.3%.
3. layered electromagnetic matrix material according to claim 1, is characterized in that, the chemical expression of this matrix material is xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and x=22.2%.
4. a preparation method for layered electromagnetic matrix material as claimed in claim 1, is characterized in that, comprise the following steps:
(1) by chemical general formula 0.35BaTiO 3-0.65BiFeO 3by analytically pure BaCO 3, TiO 2, Bi 2o 3, Fe 2o 3mixed by ball milling after preparation, then sieve, briquetting, within 4 ~ 6 hours, obtain bulk product through 880 ~ 920 DEG C of pre-burnings, cross 120 mesh sieves after then bulk product being pulverized and obtain 0.35BaTiO 3-0.65BiFeO 3powder;
(2) by chemical general formula BiY 2fe 5o 12by analytically pure Bi 2o 3, Y 2o 3, Fe 2o 3mixed by ball milling after preparation, then sieve, briquetting, through 1000 ~ 1020 DEG C of pre-burnings 4 ~ 6 hours, obtain bulk product, cross 120 mesh sieves after then bulk product being pulverized and obtain BiY 2fe 5o 12powder;
(3) to 0.35BaTiO 3-0.65BiFeO 3add granulation after PVA tackiness agent in powder, then sieve through 60 eye mesh screens, obtain the 0.35BaTiO of uniform particle sizes 3-0.65BiFeO 3powder; To BiY 2fe 5o 12add granulation after PVA tackiness agent in powder, then sieve through 60 eye mesh screens, obtain the BiY of uniform particle sizes 2fe 5o 12powder;
(4) according to chemical general formula xBiY 2fe 5o 12/ (1-x) 0.35BaTiO 3-0.65BiFeO 3, wherein x is BiY 2fe 5o 12mass percent, and 11.1%≤x≤33.3%, by 0.35BaTiO 3-0.65BiFeO 3and BiY 2fe 5o 12powder is arranged under the overlay mode compression moulding in a mold according to the barrier layer of 2-2 compound;
(5) at 1000 ~ 1050 DEG C, sinter 2 ~ 4 hours again after getting rid of PVA tackiness agent and become porcelain, obtain layered electromagnetic matrix material.
5. the preparation method of layered electromagnetic matrix material according to claim 1, is characterized in that, in described step (1), step (2), the time of ball milling is 4-6 hour.
6. the preparation method of layered electromagnetic matrix material according to claim 1, is characterized in that, to 0.35BaTiO in described step (3) 3-0.65BiFeO 3the quality adding PVA tackiness agent in powder is 0.35BaTiO 3-0.65BiFeO 38% ~ 15% of powder quality; To BiY 2fe 5o 12the quality adding PVA tackiness agent in powder is BiY 2fe 5o 128% ~ 15% of powder quality profit.
7. the preparation method of layered electromagnetic matrix material according to claim 1, is characterized in that, in described step (3), PVA tackiness agent is the polyvinyl alcohol water solution of massfraction 10%.
8. the preparation method of layered electromagnetic matrix material according to claim 1, is characterized in that, the barrier layer of the middle 2-2 compound of described step (4) is arranged under the overlay mode and is specially: according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder, BiY 2fe 5o 12powder, 0.35BaTiO 3-0.65BiFeO 3the order of powder stacks together; Or according to being followed successively by 0.35BaTiO from the top down 3-0.65BiFeO 3powder, BiY 2fe 5o 12powder, 0.35BaTiO 3-0.65BiFeO 3powder, BiY 2fe 5o 12powder, 0.35BaTiO 3-0.65BiFeO 3the order of powder stacks together.
9. the preparation method of layered electromagnetic matrix material according to claim 1, is characterized in that, described eliminating PVA tackiness agent specifically: at temperature is 550-600 DEG C, be incubated 3-5 hour.
CN201510018270.XA 2015-01-14 2015-01-14 Layered magnetoelectric composite material and preparation method thereof Pending CN104591723A (en)

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Publication number Priority date Publication date Assignee Title
CN110826220A (en) * 2019-11-04 2020-02-21 中南大学 Method for stepless regulation and control of fracture toughness of interface crack of ferroelectric composite material
CN111253151A (en) * 2020-03-14 2020-06-09 杭州电子科技大学 Bismuth ferrite barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
林营: "磁电复合材料及陶瓷粉体的低温合成研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110826220A (en) * 2019-11-04 2020-02-21 中南大学 Method for stepless regulation and control of fracture toughness of interface crack of ferroelectric composite material
CN110826220B (en) * 2019-11-04 2023-03-28 中南大学 Method for stepless regulation and control of fracture toughness of interface crack of ferroelectric composite material
CN111253151A (en) * 2020-03-14 2020-06-09 杭州电子科技大学 Bismuth ferrite barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof
CN111253151B (en) * 2020-03-14 2022-05-17 杭州电子科技大学 Bismuth ferrite barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof

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Application publication date: 20150506