CN116813320A - MnZn ferrite for MHz frequency - Google Patents
MnZn ferrite for MHz frequency Download PDFInfo
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- CN116813320A CN116813320A CN202310674906.0A CN202310674906A CN116813320A CN 116813320 A CN116813320 A CN 116813320A CN 202310674906 A CN202310674906 A CN 202310674906A CN 116813320 A CN116813320 A CN 116813320A
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 26
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 10
- 229910013184 LiBO Inorganic materials 0.000 claims abstract description 9
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910000428 cobalt oxide Inorganic materials 0.000 claims abstract description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims abstract description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000011787 zinc oxide Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 32
- 238000000498 ball milling Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 description 6
- 239000000654 additive Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011361 granulated particle Substances 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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- 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
- C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3275—Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- Engineering & Computer Science (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a MnZn ferrite for MHz frequency, which is prepared from a main component and an auxiliary component; the main components comprise ferric oxide, manganese oxide, zinc oxide and cobalt oxide; the auxiliary component comprises CaCO 3 、SiO 2 、Ta 2 O 5 、LiBO 2 、TiO 2 . The MnZn ferrite has the characteristics of high density, lower loss and the like by adding a certain amount of oxide, and the density is 4.86 g/cm after sintering at 1000 DEG C 3 Under the conditions of 1Mhz and 30mT, the loss is 385-664 kW/m in the temperature range of 25-140 DEG C 3 。
Description
Technical Field
The invention relates to a soft magnetic ferrite material and a preparation method thereof, in particular to MnZn ferrite which is obtained by sintering at low temperature (1000 ℃), has high density and lower loss characteristic and is expected to be used for MHz frequency power application.
Background
With the development of 5G communication technology and the call of green environmental protection, electronic components such as inductors, transformers, switching power supplies, etc. are required, and the development is proceeding toward high frequency, high efficiency, miniaturization, etc. The use of third generation wide bandgap semiconductors such as silicon carbide and gallium nitride enables switching power supplies to operate in the MHz frequency region. Soft magnetic MnZn ferrite is the core material of switching power supply. Therefore, it is important to develop MnZn ferrite that operates at MHz frequency. Generally, the sintering temperature is required to be 1150 ℃ or more to provide the finished product with higher density and better performance, the reduction of the sintering temperature reduces the densification degree of the sintered sample, thereby deteriorating the soft magnetic properties, and the loss at high frequency increases more rapidly with the increase of the temperature, so that the loss at high frequency also needs to be improved. Thus, a new sintering preparation process is urgently needed to obtain MnZn ferrite that can be applied at MHz-level frequencies.
Patent application document CN114835481A discloses a preparation method of a high-temperature high-frequency MnZn power ferrite material, and the power consumption of the material at 25 ℃ is less than or equal to 400 kW/m under the conditions of 1MHz and 50mT 3 The method comprises the steps of carrying out a first treatment on the surface of the The power consumption at 120 ℃ is less than or equal to 1000 kW/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The material has small power consumption change within the range of 25-80 ℃, but the power consumption is obviously increased when the temperature is increased. Although the loss of the material is not quite different from that of the material at the same temperature, the material isB m The conditions are 50 and mT which are greater than the test conditions of the material of the patent by 30mT, but the sintering temperature of the material is 1180 ℃ and the temperature is far higher than the expected sintering temperature.
Therefore, a material with lower sintering preparation temperature is developed, so that the material meets the requirement of lower energy consumption in the preparation process, and lower power consumption can be achieved under certain conditions, thereby having great significance for the application of MnZn power ferrite material.
Disclosure of Invention
In order to solve the problems existing in the background technology, the invention provides a MnZn ferrite material applied in MHz level. The material can achieve high density even when sintered at low temperature (1000 ℃), and the loss is 385-664 kW/m at 25-140 DEG C 3 。
In order to solve the technical problems, the invention adopts the following technical scheme: a MnZn ferrite for MHz frequency is prepared by the following method:
(1) Weighing the main component and the auxiliary component; the main components comprise the following components in percentage by mole: 53.50-56.10% ferric oxide, 41.80-44.80% manganese oxide, 0.50-1.00% zinc oxide, 0.15-0.5% cobalt oxide; the auxiliary components consist of the following components in total weight of the main components: 1000-2400ppm CaCO 3 30-50ppm of SiO 2 Ta at 600ppm 2 O 5 LiBO 100-1000ppm 2 1000ppm TiO 2 ；
(2) Ball milling for the first time: the main component weighed in the step (1) and the auxiliary component Ta of one-time ball milling are mixed 2 O 5 、TiO 2 Adding the mixture into deionized water, performing ball milling for 16-24 hours, and drying the obtained slurry to obtain powder; the dosage of the deionized water is 45-55% based on the total weight of the main components;
(3) Presintering: pre-sintering the powder obtained in the step (2), firstly raising the temperature to 400 ℃ at a speed of 1 ℃/min from room temperature, then raising the temperature to 970 ℃ at a speed of 1.33 ℃/min, preserving heat for 3 hours, and naturally cooling to obtain a pre-sintering material;
(4) Secondary ball milling: adding CaCO (CaCO) as an auxiliary component for secondary ball milling weighed in the step (1) into the pre-sintered material obtained in the step (3) 3 、SiO 2 、LiBO 2 And deionized water, performing secondary ball milling for 9 h hours, and drying to obtain powder with the particle size of 0.1-1.5 mu m; the dosage of the deionized water is 45-55% based on the total weight of the main components;
(5) Granulating press rings; adding a polyvinyl alcohol aqueous solution with the mass concentration of 6-12% into the powder obtained after the secondary ball milling in the step (4), uniformly mixing and granulating to obtain granules, and pressing the granules into magnetic rings; the weight ratio of the polyvinyl alcohol aqueous solution to the powder after secondary ball milling is 8-15:1;
(6) Sintering: and (3) sintering the magnetic ring prepared in the step (5) at the temperature of 1000 ℃, preserving heat for 3 hours at the sintering temperature, cooling to below 100 ℃, discharging, and obtaining the MnZn ferrite by adopting balanced oxygen partial pressure in the cooling process.
Compared with the prior art, the high-density MnZn ferrite material applied to MHz has the following beneficial effects:
different kinds of additives are added to obtain MnZn ferrite materials with different densities for MHz application, and the material is suitable for high-frequency application above MHz frequency.
In the auxiliary component of the present invention, liBO 2 Is a sintering aid with a low melting point, and LiBO is added by means of compound addition 2 And CaCO (CaCO) 3 To form a high resistivity glassy phase, liBO added during sintering 2 Can be combined with CaCO at low temperature 3 Reaction to LiCaBO 3 The glass phase reduces the sintering temperature of ferrite, and effectively improves the magnetic property and microstructure of MnZn ferrite material, thereby obtaining the MnZn ferrite with high density and applicable to MHz power.
3. The novel low-temperature sintering process can sinter the MnZn ferrite material with high density and high cut-off frequency under the condition of low temperature (1000 ℃), has great significance on energy conservation and environmental protection, and the density of the MnZn ferrite material prepared by the process reaches 4.9g/cm 3 The loss is 385-664 kW/m in the temperature range of 25-140 DEG C 3 Is expected to be applied to the MHz-level high-frequency field.
The invention describes a high-density MnZn ferrite material for MHz frequency and a preparation method thereof, the prepared MnZn ferrite has both high density and lower loss, and the density is 4.86 g/cm when sintered at 1000 DEG C 3 Solves the problems of low density and low application frequency of MnZn ferrite sintered at low temperature under the MHz condition, and has lower temperature of 25-120 DEG CLoss.
Drawings
FIG. 1 is a graph of MnZn ferrite loss obtained in each example of the present invention.
FIG. 2 is a graph of material density for a compression ring in accordance with various embodiments of the present invention.
Description of the embodiments
The invention will now be described in further detail with reference to the drawings and examples.
Examples
Step (1), batching and mixing: weighing main ingredient (Fe) 2 O 3 -55.10％、MnO-43.82％、ZnO-0.75％、Co 2 O 3 -0.33%), primary additive Ta 2 O 5 600 ppm、TiO 2 1000ppm, adding deionized water accounting for 50% of the total weight of the main components into a ball milling tank, fully mixing and ball milling until the average particle size is 0.8-1.2 mu m, obtaining slurry, and drying to obtain powder;
step (2), presintering: presintering the obtained powder at 970 ℃ for 3 hours, and naturally cooling to obtain a presintering material;
step (3), secondary ball milling: adding auxiliary component raw materials which are weighed according to a proportion into the presintered material, wherein the auxiliary component is CaCO (CaCO) according to the total weight of the main component 3 2000ppm、SiO 2 30ppm、LiBO 2 500ppm, adding deionized water accounting for 50 percent of the total weight of the main components into a ball milling tank, and performing secondary ball milling and drying to obtain powder with the average particle size of about 0.9 mu m;
step (4), granulating: adding 10 weight percent of the powder obtained in the step (3): 1. uniformly mixing and granulating PVA aqueous solution with the concentration of 10 wt% to obtain granules for molding;
step (5), forming: pressing the granulated particles into a magnetic ring with the phi of 20mm and the phi of 10mm and the 5 mm;
step (6), sintering: and (3) placing the magnetic ring molded in the step (5) into a precise atmosphere control sintering furnace for sintering, wherein the sintering temperature is 1000 ℃, preserving heat for 3 hours at the sintering temperature, cooling to below 100 ℃, discharging, and obtaining ferrite by adopting balanced oxygen partial pressure in the cooling process.
EXAMPLE 2 implementationExample 4 the main formulation ingredients were kept unchanged, but the auxiliary ingredients (SiO 2 ，CaCO 3 ，LiBO 2 ) The amounts of (2) were adjusted according to Table 1, and the test results are shown in Table 2, in the same manner as in example 1.
TABLE 1
TABLE 2
From the data in tables 1 and 2, it can be seen that:
examples 1-2 auxiliary components were within the scope of the present invention by adjusting SiO 2 The content of the material is such that the density of the material reaches the maximum of 4.86 g cm -3 The optimal loss is SiO 2 The content of CaCO is 30ppm 3 2000ppm, liBO 2 500ppm group, loss 385-664 kW/m at 25-140 DEG C 3 。
Examples 3 to 6 are CaCO 3 、LiBO 2 The content of the material is limited to the range extreme value, the density of the material is smaller, and each temperature point of the loss measured under the MHz level condition is worse than that of the examples 1-2.
As shown in FIG. 1, the optimum loss group is SiO 2 The content of CaCO is 30ppm 3 2000ppm, liBO 2 500ppm group.
As shown in fig. 2, the highest density set is the same as the best loss set.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (1)
1. The MnZn ferrite for MHz frequency is characterized by being prepared by the following steps:
(1) Weighing the main component and the auxiliary component;the main components comprise the following components in percentage by mole: 53.50-56.10% ferric oxide, 41.80-44.80% manganese oxide, 0.50-1.00% zinc oxide, 0.15-0.5% cobalt oxide; the auxiliary components consist of the following components in total weight of the main components: 1000-2400ppm CaCO 3 30-50ppm of SiO 2 Ta at 600ppm 2 O 5 LiBO 100-1000ppm 2 1000ppm TiO 2 ；
(2) Ball milling for the first time: the main component weighed in the step (1) and the auxiliary component Ta of one-time ball milling are mixed 2 O 5 、TiO 2 Adding the mixture into deionized water, performing ball milling for 16-24 hours, and drying the obtained slurry to obtain powder; the dosage of the deionized water is 45-55% based on the total weight of the main components;
(3) Presintering: pre-sintering the powder obtained in the step (2), firstly raising the temperature to 400 ℃ at a speed of 1 ℃/min from room temperature, then raising the temperature to 970 ℃ at a speed of 1.33 ℃/min, preserving heat for 3 hours, and naturally cooling to obtain a pre-sintering material;
(4) Secondary ball milling: adding CaCO (CaCO) as an auxiliary component for secondary ball milling weighed in the step (1) into the pre-sintered material obtained in the step (3) 3 、SiO 2 、LiBO 2 And deionized water, performing secondary ball milling for 9 h hours, and drying to obtain powder with the particle size of 0.1-1.5 mu m; the dosage of the deionized water is 45-55% based on the total weight of the main components;
(5) Granulating press rings; adding a polyvinyl alcohol aqueous solution with the mass concentration of 6-12% into the powder obtained after the secondary ball milling in the step (4), uniformly mixing and granulating to obtain granules, and pressing the granules into magnetic rings; the weight ratio of the polyvinyl alcohol aqueous solution to the powder after secondary ball milling is 8-15:1;
(6) Sintering: and (3) sintering the magnetic ring prepared in the step (5) at the temperature of 1000 ℃, preserving heat for 3 hours at the sintering temperature, cooling to below 100 ℃, discharging, and obtaining the MnZn ferrite by adopting balanced oxygen partial pressure in the cooling process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310674906.0A CN116813320A (en) | 2023-06-08 | 2023-06-08 | MnZn ferrite for MHz frequency |
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| CN202310674906.0A CN116813320A (en) | 2023-06-08 | 2023-06-08 | MnZn ferrite for MHz frequency |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08148322A (en) * | 1994-11-17 | 1996-06-07 | Matsushita Electric Ind Co Ltd | Oxide magnetic material and switching power supply employing the same |
| CN1503280A (en) * | 2002-11-27 | 2004-06-09 | 横店集团东磁股份有限公司 | High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof |
| JP2006298728A (en) * | 2005-04-25 | 2006-11-02 | Tdk Corp | Mn-Zn-BASED FERRITE MATERIAL |
| JP2010180101A (en) * | 2009-02-06 | 2010-08-19 | Jfe Chemical Corp | HIGH RESISTANCE AND HIGHLY SATURATED MAGNETIC FLUX DENSITY MnZnCo FERRITE, AND METHOD FOR PRODUCING THE SAME |
| CN103771845A (en) * | 2012-10-18 | 2014-05-07 | Tdk株式会社 | Ferrite sintered body |
| CN105174932A (en) * | 2015-08-29 | 2015-12-23 | 电子科技大学 | MnZn ferrite material with high direct-current superposition characteristic and preparation method for MnZn ferrite material |
| CN107021746A (en) * | 2017-04-01 | 2017-08-08 | 浙江工业大学 | A kind of MnZn ferrite material and preparation method thereof |
| CN110444361A (en) * | 2019-09-09 | 2019-11-12 | 天通瑞宏科技有限公司 | High frequency high saturation magnetic flux density ferrite and preparation method and inductor and transformer |
| CN111039666A (en) * | 2019-12-26 | 2020-04-21 | 天通控股股份有限公司 | Manganese zinc ferrite material with ultrahigh saturation magnetic flux density and preparation method thereof |
| CN111138181A (en) * | 2019-12-25 | 2020-05-12 | 江门安磁电子有限公司 | Broadband high-impedance manganese-zinc ferrite material and preparation method thereof |
| CN111138179A (en) * | 2019-12-25 | 2020-05-12 | 江门安磁电子有限公司 | Broadband high-impedance manganese-zinc ferrite material and preparation method thereof |
| CN112341179A (en) * | 2020-10-29 | 2021-02-09 | 南京新康达磁业股份有限公司 | High-frequency manganese-zinc ferrite material, and preparation method and application thereof |
| CN113024235A (en) * | 2021-02-02 | 2021-06-25 | 浙江国石磁业有限公司 | Variable-frequency wide-temperature low-loss high-magnetic-flux-density MnZn power ferrite and preparation method thereof |
| US20230042168A1 (en) * | 2020-02-19 | 2023-02-09 | Hengdian Group Dmegc Magnetics Co., Ltd. | Manganese-zinc Ferrite with High Magnetic Permeability at Negative Temperature and Low Loss at High Temperature and Method for Preparing Same |
| US20230373864A1 (en) * | 2020-10-20 | 2023-11-23 | Tokin Corporation | MnZn-BASED FERRITE |
-
2023
- 2023-06-08 CN CN202310674906.0A patent/CN116813320A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08148322A (en) * | 1994-11-17 | 1996-06-07 | Matsushita Electric Ind Co Ltd | Oxide magnetic material and switching power supply employing the same |
| CN1503280A (en) * | 2002-11-27 | 2004-06-09 | 横店集团东磁股份有限公司 | High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof |
| JP2006298728A (en) * | 2005-04-25 | 2006-11-02 | Tdk Corp | Mn-Zn-BASED FERRITE MATERIAL |
| JP2010180101A (en) * | 2009-02-06 | 2010-08-19 | Jfe Chemical Corp | HIGH RESISTANCE AND HIGHLY SATURATED MAGNETIC FLUX DENSITY MnZnCo FERRITE, AND METHOD FOR PRODUCING THE SAME |
| CN103771845A (en) * | 2012-10-18 | 2014-05-07 | Tdk株式会社 | Ferrite sintered body |
| CN105174932A (en) * | 2015-08-29 | 2015-12-23 | 电子科技大学 | MnZn ferrite material with high direct-current superposition characteristic and preparation method for MnZn ferrite material |
| CN107021746A (en) * | 2017-04-01 | 2017-08-08 | 浙江工业大学 | A kind of MnZn ferrite material and preparation method thereof |
| CN110444361A (en) * | 2019-09-09 | 2019-11-12 | 天通瑞宏科技有限公司 | High frequency high saturation magnetic flux density ferrite and preparation method and inductor and transformer |
| CN111138181A (en) * | 2019-12-25 | 2020-05-12 | 江门安磁电子有限公司 | Broadband high-impedance manganese-zinc ferrite material and preparation method thereof |
| CN111138179A (en) * | 2019-12-25 | 2020-05-12 | 江门安磁电子有限公司 | Broadband high-impedance manganese-zinc ferrite material and preparation method thereof |
| CN111039666A (en) * | 2019-12-26 | 2020-04-21 | 天通控股股份有限公司 | Manganese zinc ferrite material with ultrahigh saturation magnetic flux density and preparation method thereof |
| US20230042168A1 (en) * | 2020-02-19 | 2023-02-09 | Hengdian Group Dmegc Magnetics Co., Ltd. | Manganese-zinc Ferrite with High Magnetic Permeability at Negative Temperature and Low Loss at High Temperature and Method for Preparing Same |
| US20230373864A1 (en) * | 2020-10-20 | 2023-11-23 | Tokin Corporation | MnZn-BASED FERRITE |
| CN112341179A (en) * | 2020-10-29 | 2021-02-09 | 南京新康达磁业股份有限公司 | High-frequency manganese-zinc ferrite material, and preparation method and application thereof |
| CN113024235A (en) * | 2021-02-02 | 2021-06-25 | 浙江国石磁业有限公司 | Variable-frequency wide-temperature low-loss high-magnetic-flux-density MnZn power ferrite and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| NENGCHAO WANG ET AL.: "Development of Mn-Zn power ferrite with low losses over a broad temperature range for applications in the high frequency region of 0.5-3 MHz", CERAMICS INTERNATIONAL, vol. 47, 18 April 2021 (2021-04-18) * |
| YAO YING ET AL.: "Low temperature sintered MnZn ferrites for power applications at the frequency of 1 MHz", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol. 41, 12 May 2021 (2021-05-12), pages 5924, XP086621587, DOI: 10.1016/j.jeurceramsoc.2021.05.013 * |
| 李兆程 等: "面向5G应用第3代半导体功率器件的高频低功耗MnZn铁氧体研究进展", 硅酸盐学报, vol. 51, no. 4, 30 April 2023 (2023-04-30) * |
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