CN102167575B - LiZn ferrite material for Ka-band phase shifter and preparation method thereof - Google Patents
LiZn ferrite material for Ka-band phase shifter and preparation method thereof Download PDFInfo
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- CN102167575B CN102167575B CN 201110001941 CN201110001941A CN102167575B CN 102167575 B CN102167575 B CN 102167575B CN 201110001941 CN201110001941 CN 201110001941 CN 201110001941 A CN201110001941 A CN 201110001941A CN 102167575 B CN102167575 B CN 102167575B
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- 239000000463 material Substances 0.000 title claims abstract description 63
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 35
- 229910013391 LizN Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000000654 additive Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 30
- 238000000498 ball milling Methods 0.000 claims description 23
- 238000005245 sintering Methods 0.000 claims description 23
- 239000004615 ingredient Substances 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000000280 densification Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 230000005415 magnetization Effects 0.000 abstract description 16
- 230000005350 ferromagnetic resonance Effects 0.000 abstract description 10
- 239000012776 electronic material Substances 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052808 lithium carbonate Inorganic materials 0.000 abstract 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 238000000034 method Methods 0.000 description 10
- 230000005291 magnetic effect Effects 0.000 description 7
- -1 cobalt-substitutedlithium Chemical class 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 206010022971 Iron Deficiencies Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001457 metallic cations Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention discloses a low-loss LiZn ferrite material for a phase shifter, which belongs to the technical field of electronic materials and consists of a main material, an additive and an adhesive, and is characterized in that the main material is Fe2O3、ZnO、Mn3O4、Li2CO3Calculated as raw material according to Li0.35+xZn0.3Fe2.28Mn0.07O4+δCalculating the molecular formula of the compound of the formula,wherein x is 0.01-0.2, and x is 2 delta; the additive is Bi relative to the main material2O3、NiO、V2O5Calculated, the component is 0.5 to 2.0 wt% Bi2O3、0.1～0.4wt％NiO、0.2～0.5wt％V2O5. The invention has the excellent characteristics of low coercive force, low dielectric loss, low ferromagnetic resonance line width, high saturation magnetization and the like.
Description
Technical field
The invention belongs to technical field of electronic materials, particularly Ka wave band phase shifter LiZn Ferrite Material and preparation method.
Background technology
The demand driving of satellite communication, Radar Technology the development of microwave technology, promoted the research of microwave gyromagnetic material and device, therefore exploitation and design novel material, new unit have become one of problem of people's extensive concern.The LiZn ferrite because of the characteristics such as have under room temperature that full specific magnetising moment variable range is wide, Curie temperature is high, squareness ratio is high, remanent magnetism counter stress susceptibility is low, temperature stability good and cost is low be widely used in microwave enclosed type phase shifter and high-power component (see document 1, M Pardavi-Horvath.Microwave applications of ferrites[J] .J MagnMagn Mater, 2000,215 (6): 171-183; 2, Han Zhiquan. the general situation of development of microwave ferrite material [J]. magneticsubstance and device, 2000,31 (5): 32-35.).Compare with semiconductor phase shifter, ferrite phase shifter can bear higher peak power at S-band to Ka wave band.For the width of the drive current that reduces phase shifter and insertion loss, the raising phase shifter consistence that balances each other, the LiZn ferrite that is applied to wherein must have low-coercivity (H
c), low-dielectric loss (tan δ
ε), low ferromagnetic resonance line width (Δ H) and good temperature stability.In addition, for the reduction of device volume, device is to the high frequency future development, and this just requires Ka wave band phase shifter material to have high saturation magnetization (4 π M
s) to improve the phase-shift phase of phase shifter unit length.But there are the following problems in the preparation of Li based ferrite: 1) during the comparatively high temps sintering, can obtain high saturation magnetization, low coercive force, but squareness ratio is relatively poor, especially, is attended by the Li volatilization during high temperature sintering, cause the material composition segregation, produce Fe
2+Ion makes resistivity of material decline to a great extent, and dielectric loss significantly increases; During 2) as sintering at a lower temperature, can avoid the Li volatilization, but density is lower, is unfavorable for obtaining high saturation magnetization and low coercive force.The main way that can better address the above problem at present, is: 1) with low melting point additive B i
2O
3Reduce sintering temperature, and its segregation is in crystal boundary, effectively reduction Li volatilization (see document 3, Baba PD.Fabricationand properties of microwave lithium ferrites[J] .IEEE Trans Magn, 1972, MAG-8 (1): 83-93; 4, Yu Zhong, Chen Daizhong, blue Chinese waits .Bi
2O
3Impact [J] on sintering LiZn ferrite performance. Journal of Inorganic Materials, 2007,22 (6): 1173-1177; 5, LiuCheng-yong, Lan Zhong-wen, Jiang Xiao-na, et al.Effects of sinteringtemperature and Bi
2O
3Content on microstructure and magnetic propertiesof LiZn ferrites[J] .J Magn Magn Mater, 2008,320 (7): 1335-1339; 6, Jiang Xiao-na, Lan Zhong-wen, Yu Zhong, et al.Effects of sinteringtemperature and Bi
2O
3On Li volatilization in LiZn ferrites[C] .ICF-10.Chengdu:J.Magn.Mater.Dev., 2008:364-367.); 2) adopt scarce Fe formula sintering under air or oxygen atmosphere (to see document 7, Nutan Gupta, Mukesh C Dimri, Subhash C Kashyap, et al.Processing and properties of cobalt-substitutedlithium ferrite in the GHz frequency range.Ceramics International, 2005,31 (1): 171-176; 8, Jiang Xiaona, blue Chinese, Yu Zhong waits .Mn
3O
4Impact [J] on LiZn ferrite magnetic performance, microstructure and resistivity. Journal of Inorganic Materials, 2010,25 (1): 77-82.9, Liu Peiyuan, Yu Zhong, Jiang Xiaona, etc. the impact [J] of iron deficiency amount on LiZn ferrite electromagnetic performance. magneticsubstance and device, 2009,40 (4): 23-26.), suppress Fe
2+Generate, improve resistivity, reduce dielectric loss.
The present invention is different from the preparation method of existing LiZn Ferrite Material, has proposed a kind of new Ka wave band phase shifter with the preparation method of LiZn Ferrite Material, utilizes this technology, has successfully prepared the Ka wave band with high performance LiZn Ferrite Material.
Summary of the invention:
Technical problem to be solved by this invention is, provides a kind of Ka wave band with excellent specific properties such as low-coercivity, low-dielectric loss, low ferromagnetic resonance line width, high saturation and magnetic intensities with high performance LiZn Ferrite Material.
The present invention also provides the preparation method of aforementioned low-loss LiZn ferrite material for phase shifter.
The technical scheme that the present invention solve the technical problem employing is, Ka wave band phase shifter LiZn Ferrite Material is made of major ingredient, additive and tackiness agent, it is characterized in that, major ingredient is with Fe
2O
3, ZnO, Mn
3O
4, Li
2CO
3For the raw material meter, press Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, x=0.01～0.2 wherein, x=2 δ; With respect to major ingredient, additive is with Bi
2O
3, NiO, V
2O
5Calculate, ratio is 0.5～2.0wt%Bi
2O
3, 0.1～0.4wt%NiO, 0.2～0.5wt%V
2O
5
Further, with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, and x=0.05, major ingredient are Fe
2O
3, ZnO, Li
2CO
3, Mn
3O
4With respect to major ingredient, additive is with Bi
2O
3, NiO, V
2O
5Calculate, ratio is 1.2wt%Bi
2O
3, 0.4wt%NiO, 0.2wt%V
2O
5
Perhaps, with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, and x=0.1, major ingredient are Fe
2O
3, ZnO, Li
2CO
3, Mn
3O
4With respect to major ingredient, additive is with Bi
2O
3, NiO, V
2O
5Calculate, ratio is 1.0wt%Bi
2O
3, 0.3wt%NiO, 0.3wt%V
2O
5
Perhaps, with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, and x=0.15, major ingredient are Fe
2O
3, ZnO, Li
2CO
3, Mn
3O
4With respect to major ingredient, additive is with Bi
2O
3, NiO, V
2O
5Calculate, ratio is 1.2wt%Bi
2O
3, 0.3wt%NiO, 0.25wt%V
2O
5
The present invention also provides the preparation method of Ka wave band phase shifter with the LiZn Ferrite Material, it is characterized in that comprising the steps:
1) formula
By component Li
0.35+xZn
0.3Mn
0.07Fe
2.28O
4+ δBatching, x=0.01～0.2, x=2 δ;
2) ball milling
To with material loading powder ball milling 1～3 hour in ball mill, the material powder be mixed;
3) pre-burning
With step 2) pre-burning 1～3 hour in 760～850 ℃ of stoves of gained ball milling material;
4) doping
With step 3) gained material powder adds additive 0.5～2.0wt%Bi by weight
2O
3, 0.1～0.4wt%NiO, 0.2～0.5wt%V
2O
5
5) secondary ball milling
With step 4) in the material powder that obtains ball milling 2～6 hours in planetary ball mill;
6) moulding
With step 5) gained material powder adds 8～15wt% organic binder bond by weight, and mixing after granulation, is pressed into blank with granular powder on press;
7) atmosphere sintering
With step 6) the gained blank is placed in atmosphere sintering furnace, and in oxygen atmosphere, densification sintering is 2～5 hours at 980～1050 ℃ of temperature, and temperature-fall period is chilled to room temperature by certain rate of temperature fall.
LiZn Ferrite Material of the present invention has the excellent specific properties such as low-coercivity, low-dielectric loss, low ferromagnetic resonance line width, high saturation and magnetic intensity.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is Ka wave band phase shifter LiZn ferrite material preparation method for material process flow sheet.
Embodiment
Referring to Fig. 1.At first, by preferred highly purified Fe
2O
3, ZnO, Li
2CO
3And Mn
3O
4Be starting material, consider the Li volatilization of certain limit, adopt the formula of rich lithium component; Secondly, add a certain amount of Bi in Preburning material
2O
3, V
2O
5Additive reduces sintering temperature, suppresses the Li volatilization, simultaneously, adds a certain amount of NiO additive in Preburning material, makes the microstructure uniformity, improves the squareness ratio of material; Then, select below superhard steel ball ball milling powder material to 1 μ m preparation high reactivity powder; At last, under the prerequisite of above-mentioned formula, additive and powder optimum preparation condition, in conjunction with specific sintering temperature, prepare at low temperatures Ka wave band phase shifter LiZn Ferrite Material.
Major ingredient of the present invention is with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, x=0.05, x=2 δ.Just to divide in situation, the charge number of metallic cation and oxonium ion is respectively+and 8 and-8, as
Li
0.35Zn
0.3Fe
2.28Mn
0.07O
4, cationic charge number: 0.35+0.3*2+2.28*3+0.07*3=8, oxonium ion charge number :-2*4=-8; Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δ, cationic charge number: 0.35+x+0.3*2+2.28*3+0.07*3=8+x, oxonium ion charge number :-2* (4+ δ)=-8-2 δ.Therefore, 8+x=|-8-2 δ |, so, x=2 δ.
Embodiment is as follows more specifically:
Embodiment 1:
1) main formula: with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, x=0.05, x=2 δ; Major ingredient is Fe
2O
3, ZnO, Li
2CO
3, Mn
3O
4
2) ball milling: with step 1) raw materials used in ball mill ball milling 2 hours, the material powder is mixed;
3) pre-burning: with step 2) gained ball milling material pre-burning 2 hours in 810 ℃ of stoves;
4) doping: with step 3) gained material powder adds additive 1.2wt%Bi by weight
2O
3, 0.4wt%NiO, 0.2wt%V
2O
5, will expect powder ball milling 3 hours in planetary ball mill;
5) moulding: with step 4) the gained powder adds the 15wt% organic binder bond by weight, and mixing after granulation, is pressed into blank with granular powder on press;
6) atmosphere sintering: with step 5) the gained blank is in atmosphere sintering furnace, and in oxygen atmosphere, sintering is 3 hours at 1000 ℃ of temperature.
Through the Ka wave band phase shifter LiZn Ferrite Material that above technique is prepared, uniform crystal particles is fine and close, and average grain size is about 8.2 μ m.The material specific saturation magnetization is tested with ring title method, residual magnetic flux density, coercive force are tested with the rugged SY-8232B-H analyser of Japanese rock, density is tested with drainage, calculate saturation magnetization according to density and specific saturation magnetization, press ferromagnetic resonance line width, specific inductivity and the dielectric loss of GB/T9633-1998 " the gyromagnetic material performance test methods of microwave frequency applications " measure sample.Utilizing TH2828 and retort furnace to carry out Curie temperature measures.Its performance index are as follows:
Saturation magnetization 4 π M
s: 4800 ± 5%kA/m
Remanent magnetism B
r:＞360mT
Coercive force H
c:＜120A/m
Ferromagnetic resonance line width Δ H:12kA/m (3dB, x wave band)
DIELECTRIC CONSTANT ε ': 15 (f=9.3GHz)
Dielectric loss tan δ
ε:＜6 * 10
-4(f=9.3GHz)
Curie temperature T
c:＞460 ℃
Density d:＞4.9g/cm
3
Embodiment 2:
1) with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, x=0.10, x=2 δ; Major ingredient is Fe
2O
3, ZnO, Li
2CO
3, Mn
3O
4
2) ball milling: with step 1) raw materials used in ball mill ball milling 2 hours, the material powder is mixed;
3) pre-burning: with step 2) gained ball milling material pre-burning 2 hours in 810 ℃ of stoves;
4) doping: with step 3) gained material powder adds additive 1.0wt%Bi by weight
2O
3, 0.3wt%NiO, 0.3wt%V
2O
5, will expect powder ball milling 3 hours in planetary ball mill;
5) moulding: with step 4) the gained powder adds the 15wt% organic binder bond by weight, and mixing after granulation, is pressed into blank with granular powder on press;
6) atmosphere sintering: with step 5) the gained blank is in atmosphere sintering furnace, and in oxygen atmosphere, sintering is 2.5 hours at 1030 ℃ of temperature.
Through the Ka wave band phase shifter LiZn Ferrite Material that above technique is prepared, uniform crystal particles is fine and close, and average grain size is about 8.9 μ m.The material specific saturation magnetization is tested with ring title method, residual magnetic flux density, coercive force are tested with the rugged SY-8232B-H analyser of Japanese rock, density is tested with drainage, calculate saturation magnetization according to density and specific saturation magnetization, press ferromagnetic resonance line width, specific inductivity and the dielectric loss of GB/T9633-1998 " the gyromagnetic material performance test methods of microwave frequency applications " measure sample.Utilize TH2828 and retort furnace to carry out Curie temperature and measure, its performance index are as follows:
Saturation magnetization 4 π M
s: 4800 ± 5%kA/m
Remanent magnetism B
r:＞365mT
Coercive force H
c:＜120A/m
Ferromagnetic resonance line width Δ H:12kA/m (3dB, x wave band)
DIELECTRIC CONSTANT ε ': 15 (f=9.3GHz)
Dielectric loss tan δ
ε:＜4.5 * 10
-4(f=9.3GHz)
Curie temperature T
c:＞460 ℃
Density d:＞4.9g/cm
3
Embodiment 3:
1) with Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, x=0.15, x=2 δ; Major ingredient is Fe
2O
3, ZnO, Li
2CO
3, Mn
3O
4
2) ball milling: with step 1) raw materials used in ball mill ball milling 2 hours, the material powder is mixed;
3) pre-burning: with step 2) gained ball milling material pre-burning 2 hours in 810 ℃ of stoves;
4) doping: with step 3) gained material powder adds additive 1.2wt%Bi by weight
2O
3, 0.3wt%NiO, 0.25wt%V
2O
5, will expect powder ball milling 3 hours in planetary ball mill;
5) moulding: with step 4) the gained powder adds the 15wt% organic binder bond by weight, and mixing after granulation, is pressed into blank with granular powder on press;
6) atmosphere sintering: with step 5) the gained blank is in atmosphere sintering furnace, and in oxygen atmosphere, sintering is 2 hours at 1000 ℃ of temperature.
Through the Ka wave band phase shifter LiZn Ferrite Material that above technique is prepared, uniform crystal particles is fine and close, and average grain size is about 8.0 μ m.The material specific saturation magnetization is tested with ring title method, residual magnetic flux density, coercive force are tested with the rugged SY-8232B-H analyser of Japanese rock, density is tested with drainage, calculate saturation magnetization according to density and specific saturation magnetization, press ferromagnetic resonance line width, specific inductivity and the dielectric loss of GB/T9633-1998 " the gyromagnetic material performance test methods of microwave frequency applications " measure sample.Utilizing TH2828 and retort furnace to carry out Curie temperature measures.Its performance index are as follows:
Saturation magnetization 4 π M
s: 4800 ± 5%kA/m
Remanent magnetism B
r:＞360mT
Coercive force H
c:＜120A/m
Ferromagnetic resonance line width Δ H:12kA/m (3dB, x wave band)
DIELECTRIC CONSTANT ε ': 15 (f=9.3GHz)
Dielectric loss tan δ
ε:＜5.0 * 10
-4(f=9.3GHz)
Curie temperature T
c:＞460 ℃
Density d:＞4.9g/cm
3
Claims (5)
1.Ka wave band phase shifter LiZn Ferrite Material is made of major ingredient, additive and tackiness agent, it is characterized in that, major ingredient is with Fe
2O
3, ZnO, Mn
3O
4, Li
2CO
3For the raw material meter, press Li
0.35+xZn
0.3Fe
2.28Mn
0.07O
4+ δMolecular formula is calculated, x=0.01～0.2 wherein, x=2 δ;
With respect to major ingredient, additive is with Bi
2O
3, NiO, V
2O
5Calculate, component ratio is 0.5～2.0wt%Bi
2O
3, 0.1～0.4wt%NiO, 0.2～0.5wt%V
2O
5
2. Ka wave band phase shifter LiZn Ferrite Material as claimed in claim 1, is characterized in that, x=0.05, and with respect to major ingredient, additive is 1.2wt%Bi
2O
3, 0.4wt%NiO, 0.2wt%V
2O
5
3. Ka wave band phase shifter LiZn Ferrite Material as claimed in claim 1, is characterized in that, x=0.1, and with respect to major ingredient, additive is 1.0wt%Bi
2O
3, 0.3wt%NiO, 0.3wt%V
2O
5
4. Ka wave band phase shifter LiZn Ferrite Material as claimed in claim 1, is characterized in that, x=0.15, and with respect to major ingredient, additive is 1.2wt%Bi
2O
3, 0.3wt%NiO, 0.25wt%V
2O
5
5.Ka the wave band phase shifter is characterized in that with the preparation method of LiZn Ferrite Material, comprises the steps:
1) formula
By component Li
0.35+xZn
0.3Mn
0.07Fe
2.28O
4+ δBatching, x=0.01～0.2, x=2 δ;
2) ball milling
To with material loading powder ball milling 1～3 hour in ball mill, the material powder be mixed;
3) pre-burning
With step 2) pre-burning 1～3 hour in 760～850 ℃ of stoves of gained ball milling material;
4) doping
With step 3) gained material powder adds additive 0.5～2.0wt%Bi by weight
2O
3, 0.1～0.4wt%NiO, 0.2～0.5wt%V
2O
5
5) secondary ball milling
With step 4) in the material powder that obtains ball milling 2～6 hours in planetary ball mill;
6) moulding
With step 5) gained material powder adds 8～15wt% organic binder bond by weight, and mixing after granulation, is pressed into blank with granular powder on press;
7) atmosphere sintering
With step 6) the gained blank is placed in atmosphere sintering furnace, and in oxygen atmosphere, densification sintering is 2～5 hours at 980～1050 ℃ of temperature, and temperature-fall period is chilled to room temperature by certain rate of temperature fall.
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| CN112456993A (en) * | 2020-10-29 | 2021-03-09 | 中国航天时代电子有限公司 | Microwave ferrite material for ferrite device and preparation method thereof |
| CN112239358B (en) * | 2020-10-30 | 2022-11-29 | 成都子之源绿能科技有限公司 | Microwave LiZnTiMn gyromagnetic ferrite material and preparation method thereof |
| CN113501708A (en) * | 2021-06-23 | 2021-10-15 | 北京无线电测量研究所 | Li-series spinel microwave ferrite material and preparation method thereof |
| CN114956800B (en) * | 2022-05-23 | 2023-07-07 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | High-performance microwave polycrystalline ferrite material |
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|---|---|---|---|---|
| JP2004153196A (en) * | 2002-11-01 | 2004-05-27 | Koa Corp | Magnetic material and its producing process |
| CN101549993A (en) * | 2009-04-30 | 2009-10-07 | 深圳市华扬通信技术有限公司 | Lithium ferrite material applied to C waveband phase shifter |
| CN101552072A (en) * | 2008-12-31 | 2009-10-07 | 电子科技大学 | Low-loss LiZn ferrite material for phase shifter and preparation method thereof |
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| JP2004153196A (en) * | 2002-11-01 | 2004-05-27 | Koa Corp | Magnetic material and its producing process |
| CN101552072A (en) * | 2008-12-31 | 2009-10-07 | 电子科技大学 | Low-loss LiZn ferrite material for phase shifter and preparation method thereof |
| CN101549993A (en) * | 2009-04-30 | 2009-10-07 | 深圳市华扬通信技术有限公司 | Lithium ferrite material applied to C waveband phase shifter |
Non-Patent Citations (4)
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| Mn3O4对LiZn铁氧体磁性能、微结构和电阻率的影响;蒋晓娜等;《无机材料学报》;20100131;第25卷(第1期);第77-82页 * |
| 冯全源等.移相器材料Zn、Ti、Sn替代锂铁氧体.《无机材料学报》.2000,第15卷(第3期),第527-530页. |
| 移相器材料Zn、Ti、Sn替代锂铁氧体;冯全源等;《无机材料学报》;20000630;第15卷(第3期);第527-530页 * |
| 蒋晓娜等.Mn3O4对LiZn铁氧体磁性能、微结构和电阻率的影响.《无机材料学报》.2010,第25卷(第1期),第77-82页. |
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