CN110776314A - Wide-high-frequency anti-EMI manganese-zinc ferrite material and preparation method thereof - Google Patents
Wide-high-frequency anti-EMI manganese-zinc ferrite material and preparation method thereof Download PDFInfo
- Publication number
- CN110776314A CN110776314A CN201911336097.2A CN201911336097A CN110776314A CN 110776314 A CN110776314 A CN 110776314A CN 201911336097 A CN201911336097 A CN 201911336097A CN 110776314 A CN110776314 A CN 110776314A
- Authority
- CN
- China
- Prior art keywords
- ppm
- ferrite material
- wide
- hours
- manganese
- 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
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
- C04B2235/02—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
-
- 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
- C04B2235/02—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
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
-
- 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
- C04B2235/02—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
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- 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
- C04B2235/02—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
- C04B2235/327—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
-
- 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
- C04B2235/02—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
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
-
- 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
- C04B2235/02—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
- C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
-
- 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
- C04B2235/02—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
- C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
-
- 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
- C04B2235/02—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
- C04B2235/34—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
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- 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
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
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)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a wide-frequency EMI-resistant manganese-zinc ferrite material, which comprises main components and auxiliary components, wherein the main components comprise the following components in percentage by weight: fe
2O
346.0-49.5 mol%, ZnO 20.0-25.0 mol%, and the balance MnO, wherein the auxiliary components comprise the following components in percentage by weight: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm or NiO100 to 400 ppm; the technical problems that the wide high-frequency impedance characteristic of a generated anti-EMI filter (EMIF) is poor and the like caused by the fact that a stop band of a manganese-zinc ferrite material in the prior art is not wide enough are solved.
Description
Technical Field
The invention belongs to the technical field of ferrite materials, and particularly relates to a wide-frequency anti-EMI manganese-zinc ferrite material and a preparation method thereof.
Background
With the high-speed development of information highways, satellite communications, mobile communications, computer applications and the like, the problem of electromagnetic interference (EMI) is increasingly prominent, the electromagnetic environment is increasingly worsened, the influence of the electromagnetic interference (EMI) on the military and civil electronic information fields is increasingly serious, and great harm is caused to the public environment and personal safety as well as military secrecy and safety; filtering techniques are currently the most effective and economical means of suppressing electromagnetic interference. The operation method is very simple, an anti-EMI filter (EMIF) is inserted into an inlet of a power line of the electrical equipment, and the filter sufficiently restrains the electromagnetic interference conducted through the power line, namely, the filter can restrain the electromagnetic interference generated inside the electrical equipment and can restrain the electromagnetic interference introduced by an external power grid. Due to the wide application range of the EMIF, the EMIF has specificity compared with the traditional filter. The EMIF is required to have a stop band as wide as possible, namely, the EMIF can be regarded as harmful interference frequency except the power frequency (50-400 Hz). As an anti-EMI filter, the filter is required to have high attenuation speed and wide frequency band range, and simultaneously, signals in a working frequency range are ensured not to be distorted, so that the filter can adapt to various environments; the manganese-zinc ferrite material used as the main component of the filter has a poor high-frequency impedance characteristic of the generated anti-EMI filter (EMIF) due to the fact that the stopband of the manganese-zinc ferrite material prepared by the prior art is not wide enough.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the manganese-zinc ferrite material for wide high-frequency EMI resistance and the preparation method thereof are provided, and the technical problems that the generated EMI resistance filter (EMIF) is poor in wide high-frequency impedance characteristic and the like due to the fact that the stopband of the manganese-zinc ferrite material in the prior art is not wide enough are solved.
The technical scheme of the invention is as follows:
the wide-frequency EMI-resistant manganese-zinc ferrite material comprises a main component and an auxiliary component, wherein the main component comprises the following components in percentage by weight of oxides: fe
2O
346.0-49.5 mol%, ZnO 20.0-25.0 mol%, and the balance MnO, wherein the auxiliary components comprise the following components in percentage by weight: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm or NiO100 to 400 ppm.
The contents of the auxiliary components are as follows according to the total weight percentage of the main components: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm and NiO100 to 400 ppm.
The preparation method of the wide high-frequency EMI-resistant manganese-zinc ferrite material comprises the following steps:
(1) mixing the ingredients: weighing the raw materials according to the main component proportion, and putting the raw materials into a V-shaped mixer for dry type strong mixing for 1-2 hours;
(2) vibration grinding treatment: the mixed material is subjected to vibromilling by a vibromill for 0.5 to 1 hour;
(3) pre-burning: pre-burning the powder subjected to the vibromilling treatment in an air kiln at the temperature of 800-1000 ℃ for 2-5 hours;
(4) sanding: adding auxiliary components weighed in proportion into the pre-sintered powder, and sanding for 3-5 hours by using a circulating type sanding machine to enable the particle size D50 to be 1.1-1.5 mu m;
(5) spray granulation: granulating by using a spray granulator, wherein the inlet temperature is controlled to be 280-320 ℃ and the outlet temperature is controlled to be 100-120 ℃ during granulation;
(6) molding: forming by using a full-automatic dry press, wherein the size of a formed blank is H25 multiplied by 15 multiplied by 8mm, and the forming pressure is 10-15 Mpa;
(7) and (3) sintering: and (3) sintering in a nitrogen kiln or a bell jar furnace at the sintering temperature of 1300-1350 ℃ for 3-7 hours, and then cooling to room temperature in a nitrogen protective atmosphere to obtain the required ferrite material.
The invention has the beneficial effects that:
the initial permeability of the ferrite material provided by the invention at normal temperature is up to 4500, the ferrite material has excellent wide and high frequency impedance characteristics in the frequency band of 1-300MHz, and the characteristic parameters are shown in the following table; the invention can effectively reduce the electromagnetic wave interference of electronic equipment, and overcomes the defects that the common manganese-zinc ferrite has small resistivity and can not be used as an anti-EMI material in a wide high-frequency field; the technical problems that the wide high-frequency impedance characteristic of a generated anti-EMI filter (EMIF) is poor and the like caused by the fact that a stop band of a manganese-zinc ferrite material in the prior art is not wide enough are solved.
Detailed Description
The wide-frequency EMI-resistant manganese-zinc ferrite material comprises a main component and an auxiliary component, wherein the main component comprises the following components in percentage by weight of oxides: fe
2O
346.0-49.5 mol%, ZnO 20.0-25.0 mol%, and the balance MnO, wherein the auxiliary components comprise the following components in percentage by weight: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm or NiO100 to 400 ppm.
The contents of the auxiliary components are as follows according to the total weight percentage of the main components: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm and NiO100 to 400 ppm.
The preparation method of the wide high-frequency EMI-resistant manganese-zinc ferrite material comprises the following steps:
(1) mixing the ingredients: weighing the raw materials according to the main component proportion, and putting the raw materials into a V-shaped mixer for dry type strong mixing for 1-2 hours;
(2) vibration grinding treatment: the mixed material is subjected to vibromilling by a vibromill for 0.5 to 1 hour;
(3) pre-burning: pre-burning the powder subjected to the vibromilling treatment in an air kiln at the temperature of 800-1000 ℃ for 2-5 hours;
(4) sanding: adding auxiliary components weighed in proportion into the pre-sintered powder, and sanding for 3-5 hours by using a circulating type sanding machine to enable the particle size D50 to be 1.1-1.5 mu m;
(5) spray granulation: granulating by using a spray granulator, wherein the inlet temperature is controlled to be 280-320 ℃ and the outlet temperature is controlled to be 100-120 ℃ during granulation;
(6) molding: forming by using a full-automatic dry press, wherein the size of a formed blank is H25 multiplied by 15 multiplied by 8mm, and the forming pressure is 10-15 Mpa;
(7) and (3) sintering: and (3) sintering in a nitrogen kiln or a bell jar furnace at the sintering temperature of 1300-1350 ℃ for 3-7 hours, and then cooling to room temperature in a nitrogen protective atmosphere to obtain the required ferrite material.
The present invention will be described in more detail with reference to examples.
Example 1
(1) And (3) preparing materials: preparing the materials according to the main component percentage of the soft magnetic ferrite material, wherein: fe
2O
348.8 mol%, ZnO 22.3 mol%, MnO 28.9 mol%;
the auxiliary components based on the total weight of the main components are as follows: CaO 250ppm, Co
2O
38000ppm、SiO
230ppm、CuO600ppm。
(2) Mixing: weighing the raw materials according to the main component proportion, and putting the raw materials into a V-shaped mixer for dry type strong mixing for 1 hour;
(3) vibration grinding treatment: the material after the mixing treatment is subjected to vibromilling by a vibromill, wherein the vibromilling time is 0.6 hour;
(4) pre-burning: pre-burning the powder subjected to the vibromilling treatment in an air kiln at the temperature of 950 ℃ for 2.2 hours;
(5) sanding: adding auxiliary components weighed in proportion into the pre-sintered powder, and sanding for 3.5 hours by using a circulating sand mill, wherein the particle size D50 is 1.05 mu m;
(6) spray granulation: granulating by a spray granulator, wherein the inlet temperature is controlled to be 310 ℃ and the outlet temperature is 105 ℃ during granulation;
(6) molding: and (3) forming by adopting a full-automatic dry press, wherein the size of a formed blank is H25 multiplied by 15 multiplied by 8mm, and the forming pressure is 12 MPa.
(7) And (3) sintering: sintering in a nitrogen kiln or a bell jar furnace at the sintering temperature of 1320 ℃ for 4.5 hours, and then cooling to room temperature in a nitrogen protective atmosphere to obtain the required soft magnetic ferrite material;
the magnetic permeability mu i of an inductor TH2829A and the impedance of an impedance meter HP4191A are used for the prepared sample ring; the test results are shown in table 1.
TABLE 1
Example 2
(1) And (3) preparing materials: preparing the materials according to the main component percentage of the soft magnetic ferrite material, wherein: fe
2O
349.2 mol%, ZnO 22.1 mol%, MnO 28.7 mol%;
the auxiliary components based on the total weight of the main components are as follows: co
2O
39000ppm、NiO 200ppm。
(2) Mixing: weighing the raw materials according to the main component proportion, and putting the raw materials into a V-shaped mixer for dry type strong mixing for 1.2 hours;
(3) vibration grinding treatment: the material after the mixing treatment is subjected to vibromilling by a vibromill, wherein the vibromilling time is 0.6 hour;
(4) pre-burning: pre-burning the powder subjected to the vibromilling treatment in an air kiln at 930 ℃ for 2.5 hours;
(5) sanding: adding auxiliary components weighed in proportion into the pre-sintered powder, and sanding for 3 hours by using a circulating sand mill, wherein the particle size D50 is 1.18 mu m;
(6) spray granulation: granulating by a spray granulator, wherein the inlet temperature is controlled to be 320 ℃ and the outlet temperature is 110 ℃ during granulation;
(6) molding: and (3) forming by adopting a full-automatic dry press, wherein the size of a formed blank is H25 multiplied by 15 multiplied by 8mm, and the forming pressure is 12 MPa.
(7) And (3) sintering: sintering in a nitrogen kiln or a bell jar furnace at a sintering temperature of 1330 ℃ for 4.2 hours, and then cooling to room temperature in a nitrogen protective atmosphere to obtain the required soft magnetic ferrite material;
the magnetic permeability mu i of an inductor TH2829A and the impedance of an impedance meter HP4191A are used for the prepared sample ring; the test results are shown in table 2.
TABLE 2
Claims (3)
1. The wide-frequency EMI-resistant manganese-zinc ferrite material comprises a main component and an auxiliary component, and is characterized in that: the main components comprise the following components in percentage by weight: fe
2O
346.0-49.5 mol%, ZnO 20.0-25.0 mol%, and the balance MnO, wherein the auxiliary components comprise the following components in percentage by weight: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm or NiO100 to 400 ppm.
2. The wide high frequency EMI resistant Mn-Zn ferrite material according to claim 1, wherein: the contents of the auxiliary components are as follows according to the total weight percentage of the main components: CaO 200-600 ppm, CuO 300-800 ppm, Co
2O
33000～10000ppm、SiO
220 to 100ppm and NiO100 to 400 ppm.
3. The method for preparing a wide-frequency EMI resistant Mn-Zn ferrite material according to claim 1, which comprises:
(1) mixing the ingredients: weighing the raw materials according to the main component proportion, and putting the raw materials into a V-shaped mixer for dry type strong mixing for 1-2 hours;
(2) vibration grinding treatment: the mixed material is subjected to vibromilling by a vibromill for 0.5 to 1 hour;
(3) pre-burning: pre-burning the powder subjected to the vibromilling treatment in an air kiln at the temperature of 800-1000 ℃ for 2-5 hours;
(4) sanding: adding auxiliary components weighed in proportion into the pre-sintered powder, and sanding for 3-5 hours by using a circulating type sanding machine to enable the particle size D50 to be 1.1-1.5 mu m;
(5) spray granulation: granulating by using a spray granulator, wherein the inlet temperature is controlled to be 280-320 ℃ and the outlet temperature is controlled to be 100-120 ℃ during granulation;
(6) molding: forming by using a full-automatic dry press, wherein the size of a formed blank is H25 multiplied by 15 multiplied by 8mm, and the forming pressure is 10-15 Mpa;
(7) and (3) sintering: and (3) sintering in a nitrogen kiln or a bell jar furnace at the sintering temperature of 1300-1350 ℃ for 3-7 hours, and then cooling to room temperature in a nitrogen protective atmosphere to obtain the required ferrite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911336097.2A CN110776314A (en) | 2019-12-23 | 2019-12-23 | Wide-high-frequency anti-EMI manganese-zinc ferrite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911336097.2A CN110776314A (en) | 2019-12-23 | 2019-12-23 | Wide-high-frequency anti-EMI manganese-zinc ferrite material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110776314A true CN110776314A (en) | 2020-02-11 |
Family
ID=69394761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911336097.2A Pending CN110776314A (en) | 2019-12-23 | 2019-12-23 | Wide-high-frequency anti-EMI manganese-zinc ferrite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110776314A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113024239A (en) * | 2021-04-26 | 2021-06-25 | 贵州正业龙腾新材料开发有限公司 | Wide-temperature ultralow-loss manganese-zinc ferrite material and preparation method thereof |
| CN115650715A (en) * | 2022-10-25 | 2023-01-31 | 山东春光磁电科技有限公司 | Broadband high-impedance high-resistivity manganese-zinc ferrite material and preparation method thereof |
| CN116854459A (en) * | 2023-05-19 | 2023-10-10 | 江苏阜宁海天金宁三环电子有限公司 | High-frequency high-impedance lean iron-manganese-zinc ferrite and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63296319A (en) * | 1987-05-28 | 1988-12-02 | Nippon Denso Co Ltd | Manufacture of soft magnetic oxide material |
| CN101921103A (en) * | 2010-08-19 | 2010-12-22 | 上海电力学院 | Manganese zinc ferrite with high magnetic conductivity and preparation method thereof |
| CN102219486A (en) * | 2011-04-16 | 2011-10-19 | 江门安磁电子有限公司 | High temperature and low loss MnZn ferrite core and preparation method thereof |
| CN104261812A (en) * | 2014-09-11 | 2015-01-07 | 麦格磁电科技（珠海）有限公司 | Anti-EMI (electromagnetic interference) ferrite material and preparation method thereof |
-
2019
- 2019-12-23 CN CN201911336097.2A patent/CN110776314A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63296319A (en) * | 1987-05-28 | 1988-12-02 | Nippon Denso Co Ltd | Manufacture of soft magnetic oxide material |
| CN101921103A (en) * | 2010-08-19 | 2010-12-22 | 上海电力学院 | Manganese zinc ferrite with high magnetic conductivity and preparation method thereof |
| CN102219486A (en) * | 2011-04-16 | 2011-10-19 | 江门安磁电子有限公司 | High temperature and low loss MnZn ferrite core and preparation method thereof |
| CN104261812A (en) * | 2014-09-11 | 2015-01-07 | 麦格磁电科技（珠海）有限公司 | Anti-EMI (electromagnetic interference) ferrite material and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 余忠等: "掺Ni锰锌铁氧体力学与磁学性能", 《硅酸盐学报》 * |
| 夏德贵: "《软磁铁氧体制造原理与技术》", 31 December 2010, 陕西科学技术出版社 * |
| 林其壬: "《铁氧体工艺原理》", 30 April 1987, 上海科学技术出版社 * |
| 马永健: "《EMC设计工程实务》", 31 October 2008, 国防工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113024239A (en) * | 2021-04-26 | 2021-06-25 | 贵州正业龙腾新材料开发有限公司 | Wide-temperature ultralow-loss manganese-zinc ferrite material and preparation method thereof |
| CN115650715A (en) * | 2022-10-25 | 2023-01-31 | 山东春光磁电科技有限公司 | Broadband high-impedance high-resistivity manganese-zinc ferrite material and preparation method thereof |
| CN116854459A (en) * | 2023-05-19 | 2023-10-10 | 江苏阜宁海天金宁三环电子有限公司 | High-frequency high-impedance lean iron-manganese-zinc ferrite and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107555984B (en) | A kind of ferritic sintering process control climate methods of high frequency wide-temperature and low-consumption MnZn | |
| CN107311637B (en) | A kind of method that low-power consumption manganese-zinc ferrite is prepared based on nucleocapsid crystal grain | |
| CN110776314A (en) | Wide-high-frequency anti-EMI manganese-zinc ferrite material and preparation method thereof | |
| CN111233452B (en) | High-frequency high-impedance lean iron manganese zinc ferrite and preparation method thereof | |
| CN110526702B (en) | Preparation method of carbon composite manganese-zinc ferrite broadband wave-absorbing material | |
| KR100222757B1 (en) | A soft magnetic material for inductor and a method for manufacturing therewith | |
| CN106747395B (en) | High-cutoff-frequency high-conductivity manganese-zinc ferrite material and preparation method thereof | |
| CN106747396B (en) | High-permeability manganese-zinc ferrite material for automobile electronics and preparation method thereof | |
| CN111892395B (en) | High-frequency high-impedance manganese-zinc ferrite material and preparation method thereof | |
| CN102344283A (en) | Magnesium-zinc soft magnetic ferrite and preparation method thereof | |
| CN109485403A (en) | A kind of high BsLow loss soft magnetic ferrite material and preparation method thereof | |
| CN107352993A (en) | A kind of high frequency Mn-Zn soft magnetic ferrite and preparation method thereof | |
| CN104529423A (en) | Low-temperature-factor anti-stress nickel zinc ferrite and preparation method thereof | |
| CN1686928A (en) | High magnetic permeability ferrite in manganese zinc series of having excellent frequency characteristic and preparation method | |
| CN103693951A (en) | Anti-electromagnetic interference manganese zinc ferrite material and preparation method thereof | |
| CN109704749B (en) | Ultrahigh frequency low-loss soft magnetic ferrite material and preparation method and application of magnetic core | |
| CN111039669A (en) | High-strength anti-deformation manganese-zinc ferrite and preparation method thereof | |
| CN101183586A (en) | High magnetic conductivity, low THD soft magnetic ferrite magnetic material and method for preparing the same | |
| CN107129292B (en) | One kind prepares the ferritic ionic association alternatives of high-performance MnZn | |
| CN107673753B (en) | High-performance Mn-Zn ferrite with wireless radiation interference resistance and preparation method thereof | |
| CN112374879A (en) | Preparation method of anti-electromagnetic interference manganese-zinc ferrite material | |
| CN104291804A (en) | Method for preparing wide-temperature magnesium-copper-zinc soft magnetic ferrite core | |
| CN103641464B (en) | An anti-electromagnetic interference magnesium-zinc ferrite material and a preparation method thereof | |
| JPH09295862A (en) | Low loss ferrite material and signal chip inductor using the same | |
| CN110563454A (en) | Preparation method of excessive zinc-doped ferrite solid waste-based electromagnetic wave absorption material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200211 |
|
| RJ01 | Rejection of invention patent application after publication |