CN105967672A - High-performance calcium strontium zinc barium ferrite and preparation method thereof - Google Patents
High-performance calcium strontium zinc barium ferrite and preparation method thereof Download PDFInfo
- Publication number
- CN105967672A CN105967672A CN201610195871.2A CN201610195871A CN105967672A CN 105967672 A CN105967672 A CN 105967672A CN 201610195871 A CN201610195871 A CN 201610195871A CN 105967672 A CN105967672 A CN 105967672A
- Authority
- CN
- China
- Prior art keywords
- thing phase
- ferrite
- phase ferrite
- equal
- high performance
- 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
- C04B35/2641—Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead
-
- 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
- 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
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
-
- 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
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/62635—Mixing details
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/10—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
-
- 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
- C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
Abstract
The invention discloses high-performance calcium strontium zinc barium ferrite and a preparation method thereof. The high-performance calcium strontium zinc barium ferrite contains two compound phases of ferrite magnetic powder. The general formula of a first phase ferrite is Srl-x-y-z-kCaxLayPrzBakFe2d-nCon, wherein x is less than or equal to 0.4 and greater than or equal to 0.3; y is less than or equal to 0.4 and greater than or equal to 0.3; z is less than or equal to 0.15 and greater than or equal to 0.1; k is less than or equal to 0.15 and greater than or equal to 0.05; n is less than or equal to 0.45 and greater than or equal to 0.35; and 2d-n is less than or equal to 11.2 and greater than or equal to 10. The general formula of a second phase ferrite is Srl-xl-x2Lax1Znx2Fe2f-f1Cof1, wherein x1 is less than or equal to 0.3 and greater than or equal to 0.2; x2 is less than or equal to 0.2 and greater than or equal to 0.1; f1 is less than or equal to 0.26 and greater than or equal to 0.1; and 2f-f1 is less than or equal to 10.4 and greater than or equal to 9.8. The ferrite is prepared by steps of mixing materials, removing water content, pretreating powder, sintering, crushing, mixing and the like.
Description
Technical field
The present invention relates to a kind of high performance sintered ferrite, be specifically related to a kind of high performance calcium strontium zinc Barium hexaferrite and
Its preparation method.
Technical background
Sintered permanent ferrite is widely used in every field, especially motor, and generator magnetic shoe is the most existing
Barium hexaferrite (BaFe12O19), strontium ferrite (SrFe12O19), and exploitation both at home and abroad in recent years based on
The calcium ferrite etc. of ionic replacement technical research is all insufficient for electronic product to permanent-magnet ferrite magnetism characteristic
Requirement. the miniaturization of electronic product needs magnetic shoe to have a high magnetic energy level, high remanent magnetism, coercivity, high orthopedic
The magnetic shoe of ratio can ensure that motor normally works in the case of temperature difference fluctuation is relatively big.
For realizing being substantially improved of the magnetic property of permanent-magnet ferrite, the open a kind of La of patent CN 1335997A,
Co replaces Sr, Fe thinking respectively and achieves Br 4450Gs, Hcj 4460Oe, although magnetic property has carried
Height still cannot meet the requirement to magnetic shoe of all kinds of motor product
For realizing being substantially improved of the magnetic property of permanent-magnet ferrite, the open a kind of La of patent CN 1335997A,
Co replaces Sr, Fe thinking respectively and achieves Br 4450Gs, Hcj 4460Oe, although magnetic property increases
Still cannot meet the requirement to magnetic shoe of all kinds of motor product
For making magnetic shoe obtain patents CN 102945718 such as higher remanent magnetism, HCJ, residual magnetism temperature coefficient
A provides the permanent-magnet ferrite that a kind of calcium adds, it is ensured that magnetic shoe still keeps high magnetic flux in miniaturization process, with
And HCJ, orthopedic ratio etc..Magnetic property Br disclosed in CN 102945718 A patent is the highest at 4500Gs
Near, near corresponding Hcj3200Oe.
At present M type Sr ferrite and close to the limit, and calcium ferrite performance increase rate is limited, still without
Method realizes remanent magnetism more than 4500Gs HCJ more than 5600Oe.
Summary of the invention
Present invention aim at for the deficiencies in the prior art, it is provided that a kind of high performance calcium strontium zinc Barium hexaferrite and
Preparation method, is ensureing that magnetic internal structure is stablized and in the case of performance raising, it is achieved permanent magnetic ferrite residual magnetization is big
In 4500Gs, Hcj more than 5600Oe.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of high performance calcium strontium zinc Barium hexaferrite, it is characterised in that it contains the ferrite of two kinds of compound group phases
Magnetic powder；
First thing phase ferrite is made up of below general formula: Sr1-x-y-z-kCaxLayPrzBakFe2d-nCon, corresponding atomic ratio
Example relation is as follows:
0.3≤x≤0.4,
0.3≤y≤0.4,
0.1≤z≤0.15,
0.05≤K≤0.15,
0.35≤n≤0.45,
10≤2d-n≤11.2；
Second thing phase ferrite is made up of below general formula: Sr1-x1-x2Lax1Znx2Fe2f-f1Cof1, corresponding atomic ratio closes
It is as follows:
0.2≤x1≤0.3,
0.1≤x2≤0.2,
0.1≤f1≤0.26,
9.8≤2f-f1≤10.4；
Mass percent shared by the first described thing phase ferrite is 60%-80%, matter shared by the second thing phase ferrite
Amount percentage ratio is 20%-40%, and the first thing phase ferrite and the second thing phase ferrite percent of total are at least 90.5%
Above, it is preferred with more than 95%.
In the first described thing phase ferrite, y, z proportion is 2.2≤y/z≤3.8, and optimum range is 2.5
≤y/z≤3.0。
In the second described thing phase ferrite, x1, x2 proportion is 1.6≤x1/x2≤1.9, optimum range 1.7
≤x1/x2≤1.8。
In the first described thing phase ferrite, x optimum range is 0.33≤x≤0.37；N optimum range is 0.35
≤n≤0.38。
In the second described thing phase ferrite, x2 optimum range is 0.12≤x2≤0.19.
The preparation method of a kind of high performance calcium strontium zinc Barium hexaferrite, it is characterised in that its concrete steps include:
(1) mix:
A () is according to the first thing phase ferrite molecular structure Sr1-x-y-z-kCaxLayPrzBakFe2d-nCon, by strontium carbonate, hydrogen
Lanthana, calcium carbonate, praseodymium oxide, brium carbonate, ferrum oxide, cobalt carbonate, carry out wet ball grinding, phase in proportion
Answering Ball-milling Time to be more than 4h, water content control is at 60%-80%；
B () is according to the second thing phase ferrite molecular structure Sr1-x1-x2Lax1Znx2Fe2f-f1Cof1, by strontium carbonate, oxidation
Lanthanum, zinc oxide, ferrum oxide, Cobalto-cobaltic oxide, carry out wet ball grinding in proportion, and the compound abrasive time is maintained at
5-7h；
(2) water content is removed: by the first thing phase ferrite slurry and the second thing phase ferrum of step (1) gained
Ferrite slurry is dried at 100-200 DEG C；
(3) powder pretreatment: the powder body after two parts of drying step (3) obtained is through vibrating mill
Pulverize, cross 100-150 eye mesh screen, it is thus achieved that subglobular shape powder body；
(4) sintering: powder body after pretreatment is sintered in Muffle furnace, wherein, when the first thing is mutually ferrite sintered
Between 2-4h, be incubated 3h, sintering temperature 1300-1350 DEG C；Second mutually ferrite sintered time 1.5-3h, insulation
2h, sintering temperature 1100-1250 DEG C.
(5) broken: the first thing phase ferrite after sintering and the second thing phase ferrite are crushed respectively, broken
Front interpolation is equivalent to the minashi sugar alcohol of powder quality 0.3%-0.4%, and two kinds of ferrite materials crush the time and control
5-7min, broken rear Task-size Controlling is at 0.3-5um；
(6) mixing: the first thing phase ferrite powder 60%-80% by mass percentage after crushing, broken
After the ratio mix homogeneously of the second ferrite mass percent 20%-40%.
Adding the ethanol of proper proportion during described step (1) wet grinding, its ratio is the 10%-30% of water content；
Can also add the calcium gluconate of proper proportion, its ratio is the 0.1%-0.3% of quality of material.
The first thing phase ferrite slurry and the second thing phase ferrite slurry after described step (1) wet grinding have
The primary particle of 0.6-0.7um, and the quality weight/mass percentage composition of slip primary particle 0.6-0.7um scope exists
More than 99.3%.
The method have the benefit that patent of the present invention uses once sintered multiple thing phase, secondary hybrid technique.With biography
The once sintered of system is compared, and mixed ferrite sintered body crystal phase structure is uniformly complete, not only in terms of magnetic property
More much higher than single ferrite remanent magnetism and HCJ, the magnetic shoe after satisfied production is to smaller volume, higher
Flow direction develops, and mixed Preburning material not only reduces development cost, and keeps the advantage of performance.Should
Patented technology compound, in molding procedure, can effectively reduce injection time and material feeding pressure, reduces briquetting pressure,
Reduce the dwell time, not only product intensity shortage probability reduce and also ratio defective product be substantially improved.Close after sintering
Degree improves, and not only makes magnetic shoe blank intermediate density and both sides Density Distribution gap reduce, in follow-up sintering technique
It is easier to control Preburning material shrinkage ratio, decreases the overlapping development of mould.Even density is distributed, and reduces product
The appearance of crackle in process of production, improve yield rate, improve industrial economic benefit.
Detailed description of the invention
Below by embodiment, technical scheme is further described in detail: but the present invention is not
It is limited to these embodiments.
Embodiment
(1) first thing is mutually ferrite sintered:
According to molecular formula Sr1-x-y-z-kCaxLayPrzBakFe2d-nConAdd by strontium carbonate, lanthanum hydroxide, calcium carbonate,
Praseodymium oxide, brium carbonate, ferrum oxide, cobalt carbonate, through batch mixing, dry, sinter, broken prepare ferrite powder,
Secondary takes common ball-milling technology to take powder 1Kg, adds small powder CaCO32.0%, Si 0.9%B2O30.3%,
Ball milling 30 hours, sinters, test performance after polishing at 1300 DEG C.This tests the first thing phase ferrite altogether
Count 5 groups, such as table 1 and the corresponding magnetic characteristic of table 2.
Table 1
Table 2
(2) second things are mutually ferrite sintered:
According to molecular formula: Sr1-x1-x2Lax1Znx2Fe2f-f1Cof1Add strontium carbonate, lanthana, zinc oxide, ferrum oxide,
Cobalto-cobaltic oxide, through batch mixing, dries, sinters, broken prepares ferrite powder, and secondary takes common ball milling
Technique takes powder 1Kg, adds small powder CaCO32.0%, Si 0.9%B2O30.3%, ball milling 30 hours, at 1100 DEG C
Lower sintering, test performance after polishing.This is tested the first thing phase ferrite and amounts to 5 groups, such as table 3 and table 4.
Table 3
Table 4
(3) first thing phase ferrites and the mixing of the second thing phase ferrite
To expect powder the first thing phase A1 60%-80% by mass percentage, the second thing phase B1 is by mass percentage
The ratio mixing of 20%-40%, then test performance.This is tested the first thing phase ferrite and amounts to 5 groups. experiment knot
Really table 5.
Table 5
Claims (9)
1. a high performance calcium strontium zinc Barium hexaferrite, it is characterised in that it contains the ferromagnetic oxide powder of two kinds of compound group phases；
First thing phase ferrite is made up of below general formula: Sr1-x-y-z-kCaxLayPrzBakFe2d-nCon, corresponding atomic ratio relation is as follows:
0.3≤x≤0.4,
0.3≤y≤0.4,
0.1≤z≤0.15,
0.05≤K≤0.15,
0.35≤n≤0.45,
10≤2d-n≤11.2；
Second thing phase ferrite is made up of below general formula: Sr1-x1-x2Lax1Znx2Fe2f-f1Cof1, corresponding atomic ratio relation is as follows:
0.2≤x1≤0.3,
0.1≤x2≤0.2,
0.1≤f1≤0.26,
9.8≤2f-f1≤10.4。
A kind of high performance calcium strontium zinc Barium hexaferrite the most according to claim 1, it is characterized in that, mass percent shared by the first described thing phase ferrite is 60%-80%, mass percent shared by second thing phase ferrite is 20%-40%, first thing phase ferrite and the second thing phase ferrite percent of total, at least more than 90.5%, are preferred with more than 95%.
A kind of high performance calcium strontium zinc Barium hexaferrite the most according to claim 1, it is characterised in that in the first described thing phase ferrite, y, z proportion is 2.2≤y/z≤3.8, and optimum range is 2.5≤y/z≤3.0.
A kind of high performance calcium strontium zinc Barium hexaferrite the most according to claim 1, it is characterised in that in the second described thing phase ferrite, x1, x2 proportion is 1.6≤x1/x2≤1.9, optimum range 1.7≤x1/x2≤1.8.
A kind of high performance calcium strontium zinc Barium hexaferrite the most according to claim 1, it is characterised in that in the first described thing phase ferrite, x optimum range is 0.33≤x≤0.37；N optimum range is 0.35≤n≤0.38.
A kind of high performance calcium strontium zinc Barium hexaferrite the most according to claim 1, it is characterised in that in the second described thing phase ferrite, x2 optimum range is 0.12≤x2≤0.19.
7. the preparation method of a high performance calcium strontium zinc Barium hexaferrite, it is characterised in that its concrete steps include:
(1) mix:
A () is according to the first thing phase ferrite molecular structure Sr1-x-y-z-kCaxLayPrzBakFe2d-nCon, by strontium carbonate, lanthanum hydroxide, calcium carbonate, praseodymium oxide, brium carbonate, ferrum oxide, cobalt carbonate, carrying out wet ball grinding in proportion, corresponding Ball-milling Time is more than 4h, and water content control is at 60%-80%；
B () is according to the second thing phase ferrite molecular structure Sr1-x1-x2Lax1Znx2Fe2f-f1Cof1, by strontium carbonate, lanthana, zinc oxide, ferrum oxide, Cobalto-cobaltic oxide, carrying out wet ball grinding in proportion, the compound abrasive time is maintained at 5-7h；
(2) water content is removed: the first thing phase ferrite slurry and the second thing phase ferrite slurry of step (1) gained are dried at 100-200 DEG C；
(3) powder pretreatment: the powder body after two parts of drying step (3) obtained is pulverized through vibrating mill, crosses 100-150 eye mesh screen, it is thus achieved that subglobular shape powder body；
(4) sintering: powder body after pretreatment is sintered in Muffle furnace, wherein, the first thing mutually ferrite sintered time 2-4h, it is incubated 3h, sintering temperature 1300-1350 DEG C；Second mutually ferrite sintered time 1.5-3h, is incubated 2h, sintering temperature 1100-1250 DEG C；
(5) broken: the first thing phase ferrite after sintering and the second thing phase ferrite are crushed respectively, the minashi sugar alcohol being equivalent to powder quality 0.3%-0.4% is added before broken, two kinds of ferrite materials crush the time and control at 5-7min, broken after Task-size Controlling at 0.3-5um；
(6) mixing: the first thing phase ferrite powder 60%-80% by mass percentage after crushing, the ratio mix homogeneously of the second ferrite mass percent 20%-40% after crushing.
The preparation method of high performance calcium strontium zinc Barium hexaferrite the most according to claim 7, it is characterised in that adding the ethanol of proper proportion during described step (1) wet grinding, its ratio is the 10%-30% of water content；Can also add the calcium gluconate of proper proportion, its ratio is the 0.1%-0.3% of quality of material.
The preparation method of high performance calcium strontium zinc Barium hexaferrite the most according to claim 7, it is characterized in that, the first thing phase ferrite slurry after described step (1) wet grinding and the second thing phase ferrite slurry have the primary particle of 0.6-0.7um, and the quality weight/mass percentage composition of slip primary particle 0.6-0.7um scope is more than 99.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195871.2A CN105967672A (en) | 2016-03-30 | 2016-03-30 | High-performance calcium strontium zinc barium ferrite and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195871.2A CN105967672A (en) | 2016-03-30 | 2016-03-30 | High-performance calcium strontium zinc barium ferrite and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105967672A true CN105967672A (en) | 2016-09-28 |
Family
ID=56988865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610195871.2A Pending CN105967672A (en) | 2016-03-30 | 2016-03-30 | High-performance calcium strontium zinc barium ferrite and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105967672A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324791A (en) * | 2017-05-17 | 2017-11-07 | 马鞍山起劲磁塑科技有限公司 | A kind of processing method for improving magnetic shoe mechanical strength |
| CN111747737A (en) * | 2019-03-27 | 2020-10-09 | Tdk株式会社 | Ferrite sintered magnet and rotary electric device provided with same |
| CN114656262A (en) * | 2022-04-26 | 2022-06-24 | 太原理工大学 | High-entropy ceramic aerogel powder with low thermal conductivity and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106599A1 (en) * | 2003-05-14 | 2004-12-09 | Rutgers, The State University | Single-crystal-like materials |
| CN102701721A (en) * | 2012-05-23 | 2012-10-03 | 安徽龙磁科技股份有限公司 | Low-cost sintered calcium permanent magnetic ferrite and preparation method thereof |
-
2016
- 2016-03-30 CN CN201610195871.2A patent/CN105967672A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106599A1 (en) * | 2003-05-14 | 2004-12-09 | Rutgers, The State University | Single-crystal-like materials |
| CN102701721A (en) * | 2012-05-23 | 2012-10-03 | 安徽龙磁科技股份有限公司 | Low-cost sintered calcium permanent magnetic ferrite and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324791A (en) * | 2017-05-17 | 2017-11-07 | 马鞍山起劲磁塑科技有限公司 | A kind of processing method for improving magnetic shoe mechanical strength |
| CN107324791B (en) * | 2017-05-17 | 2020-12-22 | 马鞍山起劲磁塑科技有限公司 | Processing method for improving mechanical strength of magnetic shoe |
| CN111747737A (en) * | 2019-03-27 | 2020-10-09 | Tdk株式会社 | Ferrite sintered magnet and rotary electric device provided with same |
| CN114656262A (en) * | 2022-04-26 | 2022-06-24 | 太原理工大学 | High-entropy ceramic aerogel powder with low thermal conductivity and preparation method thereof |
| CN114656262B (en) * | 2022-04-26 | 2023-02-24 | 太原理工大学 | High-entropy ceramic aerogel powder with low thermal conductivity and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101483360B (en) | Production method of permanent ferrite magnetic shoe for DC electric motor | |
| CN104230323B (en) | M type calcium lanthanum cobalt permanent-magnet ferrite and preparation method thereof | |
| CN102050619B (en) | Method for preparing permanent magnet oxysome material | |
| CN101552069A (en) | Magnetoplumbite permanent magnetic ferrite and method of producing the same | |
| CN102690108B (en) | Permanent magnetic ferrite production method and magnetic body thereof | |
| CN112679207B (en) | Permanent magnetic ferrite material and preparation method thereof | |
| CN103548101B (en) | Magneto-plumbite type ferrite magnetic material and segment permanent magnet body therefrom | |
| CN104230326B (en) | The preparation method of M type calcium permanent ferrite | |
| CN104817319B (en) | Magnetic material powder | |
| CN109851349B (en) | High-performance environment-friendly hexagonal permanent magnetic ferrite material and preparation method thereof | |
| CN102964120A (en) | Sintered permanent magnetic ferrite and its preparation method | |
| EP3473606B1 (en) | Ferrite sintered magnet | |
| CN102701721A (en) | Low-cost sintered calcium permanent magnetic ferrite and preparation method thereof | |
| CN107382303A (en) | A kind of preparation method and magnet of high-performance permanent-magnet ferrite magnet | |
| CN111362687A (en) | Permanent magnetic ferrite and preparation method thereof | |
| CN105601265A (en) | M-type strontium ferrite magnetic material and method for preparing same | |
| CN103172360A (en) | Plumbite type yttrium permanent magnetic ferrite material and preparation method thereof | |
| CN101209920B (en) | Economic sintering permanent-magnet ferrite and preparing method thereof | |
| CN109354488A (en) | A kind of low cost permanent-magnet ferrite material and preparation method thereof | |
| CN105967672A (en) | High-performance calcium strontium zinc barium ferrite and preparation method thereof | |
| CN104230322A (en) | M-type calcium permanent magnetic ferrite and preparation method thereof | |
| CN109836147A (en) | A kind of permanent-magnet ferrite and preparation method thereof | |
| CN103626485B (en) | Production method of permanent magnetic ferrite pre-sintering material | |
| CN112645704B (en) | Preparation method of high-performance ferrite | |
| CN105481358A (en) | High-coercivity permanent magnetic ferrite and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160928 |