CN112321294A - Ferrite permanent magnetic material and preparation method thereof - Google Patents
Ferrite permanent magnetic material and preparation method thereof Download PDFInfo
- Publication number
- CN112321294A CN112321294A CN202011219074.6A CN202011219074A CN112321294A CN 112321294 A CN112321294 A CN 112321294A CN 202011219074 A CN202011219074 A CN 202011219074A CN 112321294 A CN112321294 A CN 112321294A
- Authority
- CN
- China
- Prior art keywords
- parts
- sintering
- permanent magnetic
- ferrite permanent
- ball milling
- 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
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 32
- 239000000696 magnetic material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000005245 sintering Methods 0.000 claims abstract description 27
- 238000000498 ball milling Methods 0.000 claims abstract description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 229910000018 strontium carbonate Inorganic materials 0.000 claims abstract description 9
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 claims abstract description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 4
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 208000005156 Dehydration Diseases 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052681 coesite Inorganic materials 0.000 abstract description 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 229910052682 stishovite Inorganic materials 0.000 abstract description 3
- 229910052905 tridymite Inorganic materials 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 abstract 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 7
- 239000000654 additive Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229940029329 intrinsic factor Drugs 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- -1 rare earth ion Chemical class 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
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
- C04B35/01—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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
-
- 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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide 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
- C04B2235/327—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
- C04B2235/34—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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/442—Carbonates
-
- 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
- C04B2235/608—Green bodies or pre-forms with well-defined density
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention provides a ferrite permanent magnet material and a preparation method thereof, belonging to the technical field of permanent magnet materials. The permanent magnet material comprises the following components in parts by weight: fe2O3，SrCO3，La2O3，Co2O3，CaCO3，SiO2. The preparation method comprises the following steps: proportioning, wet rolling, precipitating, primary forming, pre-burning, primary crushing, secondary ball milling, secondary forming and sintering. The ferrite permanent magnetic material can fully generate a permanent magnetic ferrite M phase by increasing the replacement amount of the combined ions in the material in the pre-sintering process, pre-sintering in a sufficient oxidizing atmosphere and setting a proper pre-sintering temperature, so that a better permanent magnetic ferrite M phase can be obtainedMagnetic performance; the particle size is controlled in the secondary ball milling step, so that the production efficiency and the qualification rate of molding are improved, the sintered product has the characteristics of high remanence, high coercive force and high intrinsic performance which can meet the performance requirements of TDKFB12, and the method has popularization and application values.
Description
Technical Field
The invention belongs to the technical field of permanent magnet materials, and particularly relates to a ferrite permanent magnet material and a preparation method thereof.
Background
The permanent magnetic material is an indispensable material in the electronic industry, and plays an important role in the research and development of magnetic materials by virtue of wide raw material sources, low price and excellent magnetic performance. Is widely applied to household appliances and steamThe fields of vehicles, computers, communication, medical treatment, aerospace, military and the like. With the increasing performance requirements of permanent magnetic materials due to the wide application of permanent magnetic materials, after FB9 and FB12 series high performance permanent magnetic ferrite products are released by japan TDK corporation, the king brand enterprise meeting the market demand of ferrite industry, various manufacturers explore ways to improve the magnetic performance of permanent magnetic ferrite from the aspects of raw materials, secondary addition, production process, and the like. CaCO is a commonly used additive in permanent magnetic ferrites3、Al2O3、SiO2、H3BO3And a portion of the rare earth oxide. The disadvantage of these additives is CaCO3And partial rare earth oxidation and other additives improve the remanence, and simultaneously, the coercive force and intrinsic coercive force of the material are reduced; al (Al)2O3、SiO2When the coercive force and the intrinsic coercive force of the material are improved by the additives, the remanence is also sharply reduced.
Disclosure of Invention
In view of the above, the present invention provides a ferrite permanent magnetic material and a preparation method thereof.
Through research, the invention adopts the following technical scheme:
1. a ferrite permanent magnetic material comprises the following components in parts by weight: fe2O3: 100 parts of (A); SrCO3: 10-15 parts; la2O3: 1.5-5 parts; co2O3: 0.5-3 parts; CaCO3: 2-5 parts; SiO 22: 0.3-1 part.
Preferably, the composition comprises the following components in parts by weight: fe2O3: 100 parts of (A); SrCO3: 15 parts of (1); la2O3: 4.5 parts; co2O3: 2 parts of (1); CaCO3: 4 parts of a mixture; SiO 22: 0.3 part.
2. The method for preparing the ferrite permanent magnetic material comprises the following steps:
wet mixing: wet mixing the raw materials obtained according to the proportion for 1 to 3 hours;
and (3) precipitation: precipitating the raw materials obtained by wet mixing;
one-step forming: pressing and molding the precipitated raw materials;
pre-burning: pre-sintering the raw materials subjected to compression molding, wherein the pre-sintering temperature is 1200-;
primary crushing: carrying out dry ball milling crushing on the pre-sintering material, and sieving by ultrasonic classification;
secondary ball milling: the method comprises the following steps: ball: a wet abrasive with a water ratio of 1-1.5:8-10: 1.5-2.5;
secondary molding: pressing and molding the slurry obtained by secondary ball milling;
and (3) sintering: sintering the molded green body at 1180-1200 deg.c for 2-4 hr, and cooling to normal temperature.
Preferably, the water content in the raw material after precipitation is 32-35%.
Preferably, the secondary ball milling is carried out, and the granularity of the ground material is 0.80-0.9 μm.
Preferably, after the secondary ball milling, dehydration treatment is further performed, and the water content of the dehydrated slurry is 32-35%.
Preferably, after the secondary forming, the density of the formed green blank is 2.9-3.8 g/cm2。
Preferably, the sintering adopts a double-push-plate tunnel electric kiln to sinter the molded green body, and the feeding speed is 8-10 minutes per plate.
The invention has the beneficial effects that:
the permanent magnet ferrite material is sintered in a 45-meter sintering kiln by jointly replacing the replacement amount of strontium/iron in hexagonal strontium ferrite with La-Co ions in a primary pre-sintered material. The pre-sintering material can be better oxidized in the sintering process and can obtain better magnetic performance by setting a proper pre-sintering temperature and sufficient heat preservation time; by controlling the granularity in the secondary ball milling step, the granularity consistency after ball milling is good, and the product formability is good, so that the production efficiency and the qualification rate of the forming are improved; through sintering treatment, the obtained ferrite permanent magnet material has the advantages of high remanence, high coercive force, high intrinsic property and the like through a test result of a magnetic material test device, can meet the performance requirements of TDKFB12, and has popularization and application values.
Drawings
FIG. 1 is a graph illustrating the performance testing and analysis of the permanent-magnet ferrite material prepared in this example 1;
FIG. 2 is a graph illustrating the performance testing and analysis of the ferrite permanent magnetic material prepared in this example 2;
FIG. 3 is a graph of performance testing and analysis of the ferrite permanent magnetic material prepared in this example 3;
fig. 4 is a performance test analysis chart of the ferrite permanent magnetic material prepared in this example 4.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the ferrite permanent magnet material in the embodiment comprises the following steps:
1) preparing materials: the materials are prepared according to the following weight percentages: fe2O3: 100 parts of (A); SrCO3: 15 parts of (1); la2O3: 3 parts of a mixture; co2O3:1 part; CaCo3: 5 parts of a mixture; SiO 22:1 part;
2) wet mixing: wet mixing the raw materials obtained by burdening for 2 hours by adopting a ball mill, and ensuring the uniformity of the mixed materials;
3) and (3) precipitation: precipitating the wet mixed raw material by using a precipitation tower or a wood box to ensure that the water content in the precipitated raw material is 34 percent;
4) one-time compression molding: automatic molding press adopting 150 tons and 150 kg per cm2The pressure of the pressure is used for pressing and molding the precipitated raw materials, so that the consistency of the density is ensured, and the solid-phase reaction in the presintering process is facilitated;
5) pre-burning: pre-sintering the raw materials subjected to compression molding by adopting a 45-meter kiln, wherein the pre-sintering temperature is 1210 ℃, preserving heat for 2 hours, and then naturally cooling to obtain a pre-sintered material, wherein the pre-sintering temperature can ensure that a high-performance M phase is produced in the pre-sintered material, and the rare earth ion replacement rate is higher;
6) primary crushing: the presintering material is subjected to dry ball milling and crushing, the crushed presintering material is sieved and classified by adopting an ultrasonic vibration sieve, and the consistency of feeding particles of secondary grinding materials is ensured by adopting ultrasonic classification screening, so that the consistency of slurry particles is achieved;
7) secondary ball milling: the method comprises the following steps: ball: wet grinding with water ratio of 1:10:1.8, the grain size after grinding is 0.80-0.90 μm, and then dehydrating to make the water content of the dehydrated slurry 33%;
8) secondary molding: the slurry obtained by secondary ball milling is pressed and molded by adopting a 150-ton automatic hydraulic press and a hard alloy runner type die, and the density of the molded green body is 2.9-3.8 g/cm2；
9) And (3) sintering: sintering the molded green body by adopting a 36-meter double-push-plate tunnel electric kiln, wherein the feeding speed is 8 minutes per plate, the sintering temperature is 1190 ℃, and after heat preservation is carried out for 2.5 hours, the green body is cooled to the normal temperature along with the kiln discharging speed.
Example 2
In this embodiment, the ferrite permanent magnet material is prepared from the following raw materials in percentage by weight: fe2O3: 100 parts of (A); SrCO3: 15 parts of (1); la2O3: 4 parts of a mixture; co2O3:1.5 parts; CaCO3: 2 parts of (1); SiO 22: 0.5 part. The remaining preparation steps and conditions were the same as in example 1.
Example 3
In this embodiment, the ferrite permanent magnet material is prepared from the following raw materials in percentage by weight: fe2O3: 100 parts of (A); SrCO3: 15 parts of (1); la2O3: 4.5 parts; co2O3: 2 parts of (1); CaCo3: 4 parts of a mixture; SiO 22: 0.3 part. The remaining preparation steps and conditions were the same as in example 1.
Example 4
In this embodiment, the ferrite permanent magnet material is prepared from the following raw materials in percentage by weight: fe2O3: 100 parts of (A); SrCO3: 15 parts of (1); la2O3: 4.5 parts; co2O3:1.5 parts; CaCo3: 4.5 parts; SiO 22: 0.8 part. The remaining preparation steps and conditions were the same as in example 1.
The magnetic materials obtained in examples 1 to 4 were tested by a magnetic material testing apparatus, and the test results are shown in fig. 1 to 4:
as can be seen from the analysis in FIG. 3, the properties of the permanent magnetic material obtained by the additive ratio in example 3 can reach a remanent magnetic flux density Br of ≥ 445mT, a coercive force Hcb of ≥ 330KA/m, an intrinsic coercive force Hcj of ≥ 400KA/m, and a maximum magnetic energy product (BH) max of ≥ 38KJ/m3. The performance of the material produced by the proportion is close to the performance requirement of Japanese TDKFB 12.
From the comprehensive analysis of the test data in fig. 1 to fig. 4, the prepared permanent magnetic ferrite material has high remanence: the motor can be ensured to have higher rotating speed, large output torque and large power; high coercive force: the electromotive force required by the output of the motor is ensured, the working point of the motor is close to the maximum magnetic energy product, and the capability of the magnet is fully utilized; high intrinsic factor: the motor is ensured to have strong overload demagnetization resistance, ageing resistance and high and low temperature resistance; high magnetic energy product: the actual operation work coefficient in the motor is better, and the like. Can meet different customer requirements and enhance the market competitiveness.
It should be understood that the above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents may be made in the technical solutions described in the foregoing embodiments, or some technical features may be substituted. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A ferrite permanent magnetic material is characterized in that,the composition comprises the following components in parts by weight: fe2O3: 100 parts of (A); SrCO3: 10-15 parts; la2O3: 1.5-5 parts; co2O3: 0.5-3 parts; CaCO3: 2-5 parts; SiO 22: 0.3-1 part.
2. The ferrite permanent magnetic material as claimed in claim 1, which is characterized by comprising the following components in parts by weight: fe2O3: 100 parts of (A); SrCO3: 15 parts of (1); la2O3: 4.5 parts; co2O3: 2 parts of (1); CaCO3: 4 parts of a mixture; SiO 22: 0.3 part.
3. A method of forming a ferrite permanent magnet material as claimed in claim 1 or 2, comprising the steps of:
wet mixing: wet mixing the raw materials obtained according to the proportion for 1 to 3 hours;
and (3) precipitation: precipitating the raw materials obtained by wet mixing;
one-step forming: pressing and molding the precipitated raw materials;
pre-burning: pre-sintering the raw materials subjected to compression molding, wherein the pre-sintering temperature is 1200-;
primary crushing: carrying out dry ball milling crushing on the pre-sintering material, and sieving by ultrasonic classification;
secondary ball milling: the method comprises the following steps: ball: a wet abrasive with a water ratio of 1-1.5:8-10: 1.5-2.5;
secondary molding: pressing and molding the slurry obtained by secondary ball milling;
and (3) sintering: sintering the molded green body at 1180-1200 deg.c for 2-4 hr, and cooling to normal temperature.
4. The method of claim 3, wherein the water content of the precipitated raw material is 32-35%.
5. The method for preparing a ferrite permanent magnetic material according to claim 3, wherein the secondary ball milling is carried out, and the particle size after grinding is 0.8-0.9 μm.
6. The method for preparing the ferrite permanent magnetic material according to claim 3, wherein the secondary ball milling is followed by dehydration treatment, and the water content of the dehydrated slurry is 32-35%.
7. The method for preparing a ferrite permanent magnet material according to claim 3, wherein after the secondary molding, the green compact obtained by molding has a density of 2.9-3.8 g/cm2。
8. The method for preparing ferrite permanent magnetic material according to claim 3, wherein the sintering is carried out by adopting a double push plate tunnel electric kiln to sinter the formed green body, and the vehicle speed is 8-10 minutes per plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011219074.6A CN112321294A (en) | 2020-11-04 | 2020-11-04 | Ferrite permanent magnetic material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011219074.6A CN112321294A (en) | 2020-11-04 | 2020-11-04 | Ferrite permanent magnetic material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112321294A true CN112321294A (en) | 2021-02-05 |
Family
ID=74315379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011219074.6A Pending CN112321294A (en) | 2020-11-04 | 2020-11-04 | Ferrite permanent magnetic material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112321294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072368A (en) * | 2021-03-15 | 2021-07-06 | 杭州电子科技大学 | Atmosphere sintering method of high-performance M-type ferrite |
| CN113248246A (en) * | 2021-06-19 | 2021-08-13 | 上海龙磁电子科技有限公司 | High-magnetic strontium ferrite, and preparation method and application thereof |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217812A (en) * | 1997-02-25 | 1999-05-26 | Tdk株式会社 | Oxide magnetic material, ferrite particles, sintered magnet, bonded magnet, magnetic recording medium and motor |
| JP2001189209A (en) * | 1999-12-28 | 2001-07-10 | Tdk Corp | Sintered magnet and method for manufacturing the same |
| US20070009767A1 (en) * | 2003-07-31 | 2007-01-11 | Yoshihiko Minachi | Ferrite magnetic material and method for producing hexagonal w type ferrite magnetic material |
| CN101615470A (en) * | 2009-05-18 | 2009-12-30 | 浙江凯文磁钢有限公司 | High-performance permanent magnet ferrite arch magnet and sintering method |
| US20120105185A1 (en) * | 2009-06-30 | 2012-05-03 | Hitachi Metals, Ltd. | Method for producing sintered ferrit magnet, and sintered ferrite magnet |
| CN102690108A (en) * | 2012-02-21 | 2012-09-26 | 横店集团东磁股份有限公司 | Permanent magnetic ferrite production method and magnetic body thereof |
| CN103265277A (en) * | 2013-06-14 | 2013-08-28 | 南通飞来福磁铁有限公司 | Preparation method of permanent magnetic ferrite |
| CN103274678A (en) * | 2013-06-14 | 2013-09-04 | 南通飞来福磁铁有限公司 | Preparation method of hexagonal permanent magnetic ferrite |
| CN103724004A (en) * | 2013-11-13 | 2014-04-16 | 横店集团东磁股份有限公司 | High-coercivity permanent magnetic ferrite material and preparation method thereof |
| CN103771882A (en) * | 2013-12-31 | 2014-05-07 | 重庆凌达磁材科技有限公司 | Permanent magnetic ferrite and preparation method and ultrathin permanent magnetic ferrite magnetic shoe thereof |
| CN108101529A (en) * | 2017-12-20 | 2018-06-01 | 横店集团东磁股份有限公司 | A kind of production method for shrinking smaller permanent magnetic ferrite magnet |
| CN109111219A (en) * | 2017-06-26 | 2019-01-01 | 上海梅山钢铁股份有限公司 | A kind of preparation method of permanent-magnet ferrite material |
| CN110342923A (en) * | 2019-06-17 | 2019-10-18 | 横店集团东磁股份有限公司 | A kind of dry-pressing opposite sex ferrite fines preparation method and dry-pressing opposite sex permanent-magnet ferrite improving the degree of orientation and performance |
| CN110372365A (en) * | 2019-07-16 | 2019-10-25 | 横店集团东磁股份有限公司 | A kind of preparation method of permanent-magnet ferrite material |
-
2020
- 2020-11-04 CN CN202011219074.6A patent/CN112321294A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217812A (en) * | 1997-02-25 | 1999-05-26 | Tdk株式会社 | Oxide magnetic material, ferrite particles, sintered magnet, bonded magnet, magnetic recording medium and motor |
| JP2001189209A (en) * | 1999-12-28 | 2001-07-10 | Tdk Corp | Sintered magnet and method for manufacturing the same |
| US20070009767A1 (en) * | 2003-07-31 | 2007-01-11 | Yoshihiko Minachi | Ferrite magnetic material and method for producing hexagonal w type ferrite magnetic material |
| CN101615470A (en) * | 2009-05-18 | 2009-12-30 | 浙江凯文磁钢有限公司 | High-performance permanent magnet ferrite arch magnet and sintering method |
| US20120105185A1 (en) * | 2009-06-30 | 2012-05-03 | Hitachi Metals, Ltd. | Method for producing sintered ferrit magnet, and sintered ferrite magnet |
| CN102690108A (en) * | 2012-02-21 | 2012-09-26 | 横店集团东磁股份有限公司 | Permanent magnetic ferrite production method and magnetic body thereof |
| CN103265277A (en) * | 2013-06-14 | 2013-08-28 | 南通飞来福磁铁有限公司 | Preparation method of permanent magnetic ferrite |
| CN103274678A (en) * | 2013-06-14 | 2013-09-04 | 南通飞来福磁铁有限公司 | Preparation method of hexagonal permanent magnetic ferrite |
| CN103724004A (en) * | 2013-11-13 | 2014-04-16 | 横店集团东磁股份有限公司 | High-coercivity permanent magnetic ferrite material and preparation method thereof |
| CN103771882A (en) * | 2013-12-31 | 2014-05-07 | 重庆凌达磁材科技有限公司 | Permanent magnetic ferrite and preparation method and ultrathin permanent magnetic ferrite magnetic shoe thereof |
| CN109111219A (en) * | 2017-06-26 | 2019-01-01 | 上海梅山钢铁股份有限公司 | A kind of preparation method of permanent-magnet ferrite material |
| CN108101529A (en) * | 2017-12-20 | 2018-06-01 | 横店集团东磁股份有限公司 | A kind of production method for shrinking smaller permanent magnetic ferrite magnet |
| CN110342923A (en) * | 2019-06-17 | 2019-10-18 | 横店集团东磁股份有限公司 | A kind of dry-pressing opposite sex ferrite fines preparation method and dry-pressing opposite sex permanent-magnet ferrite improving the degree of orientation and performance |
| CN110372365A (en) * | 2019-07-16 | 2019-10-25 | 横店集团东磁股份有限公司 | A kind of preparation method of permanent-magnet ferrite material |
Non-Patent Citations (3)
| Title |
|---|
| WEI WANG 等: "influence of iron content on microstructure and magnetic properties of Sr0.3La0.4Ca0.3n(Fe2O3)Co0.4", 《JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM》 * |
| 惠亚娟: "高性能永磁锶铁氧体的离子取代和小料添加改性研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 肖复勋: "CaCO3-SiO2复合添加剂对锶铁氧体磁性能的影响", 《电子元件与材料》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072368A (en) * | 2021-03-15 | 2021-07-06 | 杭州电子科技大学 | Atmosphere sintering method of high-performance M-type ferrite |
| CN113072368B (en) * | 2021-03-15 | 2022-05-13 | 杭州电子科技大学 | Atmosphere sintering method of high-performance M-type ferrite |
| CN113248246A (en) * | 2021-06-19 | 2021-08-13 | 上海龙磁电子科技有限公司 | High-magnetic strontium ferrite, and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112679207B (en) | Permanent magnetic ferrite material and preparation method thereof | |
| CN102050619B (en) | Method for preparing permanent magnet oxysome material | |
| CN109400139B (en) | Preparation process of low-cost permanent magnetic ferrite material | |
| EP3364426A1 (en) | Ferrite magnetic material and ferrite sintered magnet | |
| CN106365626B (en) | A kind of anisotropic ferritic manufacturing method of dry-pressing | |
| EP3473606B1 (en) | Ferrite sintered magnet | |
| CN111362687A (en) | Permanent magnetic ferrite and preparation method thereof | |
| CN112321294A (en) | Ferrite permanent magnetic material and preparation method thereof | |
| JPS60221549A (en) | Rare earth permanent magnet | |
| CN112908676A (en) | Permanent magnetic ferrite magnetic powder for dry pressing molding and preparation method thereof | |
| CN111056832A (en) | Ferrite permanent magnetic material and preparation method thereof | |
| CN111423226B (en) | Permanent magnetic ferrite and preparation method and application thereof | |
| CN109836147A (en) | A kind of permanent-magnet ferrite and preparation method thereof | |
| CN109102977B (en) | High-density dry-pressed anisotropic ferrite magnet and manufacturing method thereof | |
| CN108516816B (en) | Y30H-2 permanent magnetic ferrite magnetic shoe for direct current motor and preparation method thereof | |
| JPH07106172A (en) | Manufacture of ferrite magnet | |
| CN111943660B (en) | Strontium permanent magnetic ferrite, preparation method and dispersing agent used by preparation method | |
| CN107473724A (en) | A kind of preparation method and product of high-performance M types calcium strontium ferrite | |
| CN105967672A (en) | High-performance calcium strontium zinc barium ferrite and preparation method thereof | |
| JP3506174B2 (en) | Method for producing ferrite magnet and powder thereof | |
| JPH05258928A (en) | Permanent magnet and powder thereof and manufacturing method thereof | |
| CN111018510A (en) | Manufacturing method of multi-pole magnetic ring | |
| CN116120049B (en) | Preparation method of calcium lanthanum cobalt ferrite magnet, calcium lanthanum cobalt ferrite magnet and application | |
| CN115010478B (en) | Different-polarity dry-pressed ferrite and preparation method thereof | |
| CN113896522B (en) | Permanent magnetic ferrite and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |