CN112645704A - Preparation method of high-performance ferrite - Google Patents
Preparation method of high-performance ferrite Download PDFInfo
- Publication number
- CN112645704A CN112645704A CN202011578997.0A CN202011578997A CN112645704A CN 112645704 A CN112645704 A CN 112645704A CN 202011578997 A CN202011578997 A CN 202011578997A CN 112645704 A CN112645704 A CN 112645704A
- Authority
- CN
- China
- Prior art keywords
- sintering
- raw materials
- ferrite
- steps
- following
- 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.)
- Granted
Links
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 238000005245 sintering Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 26
- 238000000498 ball milling Methods 0.000 claims abstract description 18
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 208000005156 Dehydration Diseases 0.000 claims abstract description 14
- 230000018044 dehydration Effects 0.000 claims abstract description 14
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 14
- 238000001238 wet grinding Methods 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 239000004615 ingredient Substances 0.000 claims abstract description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- 239000000654 additive Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 10
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 5
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 5
- 229910001938 gadolinium oxide Inorganic materials 0.000 claims description 5
- 229940075613 gadolinium oxide Drugs 0.000 claims description 5
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 claims description 5
- KBLRIGLPGMRISA-UHFFFAOYSA-N neodymium(3+) oxygen(2-) praseodymium(3+) Chemical compound [O-2].[Pr+3].[Nd+3].[O-2].[O-2] KBLRIGLPGMRISA-UHFFFAOYSA-N 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229910000018 strontium carbonate Inorganic materials 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- 239000004227 calcium gluconate Substances 0.000 claims description 3
- 229960004494 calcium gluconate Drugs 0.000 claims description 3
- 235000013927 calcium gluconate Nutrition 0.000 claims description 3
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 125000005619 boric acid group Chemical group 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 9
- 239000012071 phase Substances 0.000 description 7
- 230000005389 magnetism Effects 0.000 description 5
- 238000003746 solid phase reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- ROYOLNQPXVHWNE-UHFFFAOYSA-N [Co].[Ca].[La] Chemical compound [Co].[Ca].[La] ROYOLNQPXVHWNE-UHFFFAOYSA-N 0.000 description 2
- WOIHABYNKOEWFG-UHFFFAOYSA-N [Sr].[Ba] Chemical compound [Sr].[Ba] WOIHABYNKOEWFG-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 150000002500 ions Chemical group 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052712 strontium 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
- C04B35/622—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
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
-
- 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
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
-
- 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
- C04B35/63—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 using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
-
- 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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3213—Strontium oxides 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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
-
- 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
- C04B2235/3272—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
- C04B2235/3284—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
- C04B2235/60—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
- C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Magnetic Ceramics (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention relates to the technical field of magnetic materials, and discloses a preparation method of high-performance ferrite, which comprises the following steps: the method comprises the following steps: pretreating the raw materials at high temperature; step two: weighing the ingredients and performing wet grinding and crushing; step three: performing dehydration treatment, namely dehydrating the mixed material obtained in the step two by using a horizontal centrifuge, wherein the solid content of the slurry obtained after dehydration is 67 wt%; step four: pre-burning step by step; step five: grinding and ball milling, namely, grinding the pre-sintered material obtained by pre-sintering step by step in the fourth step by dry ball milling, adding a dispersing agent for secondary ball milling, and continuously ball milling for 18 hours to obtain slurry; step six: molding; step seven: sintering, heat treating the molded body in the sixth step at a temperature of 200 ℃ to remove moisture. The high propertyPreparation method of ferrite with phase molecular formula Sr(1‑a‑2b‑c‑d)CaaPrbNdbLacGddFe(2n‑x‑y)CoxZnyO19The performance of the permanent magnetic ferrite with the remanence larger than or equal to 4550 Gs intrinsic coercive force larger than or equal to 5500 Oe is realized by high-temperature pretreatment, wet grinding and disintegration, stepwise pre-sintering and the like of raw materials for proportioning.
Description
Technical Field
The invention relates to the technical field of magnetic materials, in particular to a preparation method of high-performance ferrite.
Background
In the modern society, with the rapid development of the electronic industry, the demand of magnetic materials is more and more, although China is a large country for producing magnetic materials, the product size precision and the performance grade of the magnetic materials are different from those of developed countries, and as one kind of magnetic materials, the permanent magnetic ferrite is the most widely applied magnetic material at present, particularly, the high-performance permanent magnetic ferrite material is a basic functional material for the contemporary society and the development thereof, and along with the development trend of miniaturization and lightness and thinness of various electronic and electric products, the requirement on the performance of the ferrite is higher and higher.
At present, the existing strontium barium ferrite and calcium lanthanum cobalt ferrite developed at home and abroad based on an ion substitution technology are not enough to meet the requirement of miniaturization of electronic products on the increasingly high magnetic property of the permanent magnetic ferrite, and the performance that the residual magnetism is larger than or equal to 4500Gs intrinsic coercive force is larger than or equal to 5500 Oe still cannot be realized at the highest, for example, the idea that La and Co are used for replacing Sr and Fe respectively disclosed by patent CN 1335997A realizes Br 4450Gs and Hcj 4460 Oe, and the magnetic properties Br4500Gs and Hcj3200 Oe disclosed by patent CN 102945718A.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of high-performance ferrite, which has Sr in a phase molecular formula(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19The method has the advantages that the performance that the residual magnetism of the permanent magnetic ferrite is larger than or equal to 4550 Gs intrinsic coercive force is larger than or equal to 5500 Oe is realized through high-temperature pretreatment, wet grinding and breaking, stepwise pre-sintering and the like of raw materials, and the problems that the existing strontium barium ferrite and the calcium lanthanum cobalt ferrite developed at home and abroad based on the ion substitution technology are not enough to meet the requirement that the miniaturization of electronic products is higher and higher on the magnetic property of the permanent magnetic ferrite, and the performance that the residual magnetism is larger than or equal to 4500Gs intrinsic coercive force is not larger than or equal to 5500 Oe at most are solved.
(II) technical scheme
To achieve Sr in the molecular formula of phase(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19In order to match, the purpose of realizing the performance of the permanent magnetic ferrite with the remanence larger than or equal to 4550 Gs intrinsic coercive force larger than or equal to 5500 Oe is realized through high-temperature pretreatment of raw materials, wet grinding, disintegration, stepwise pre-sintering and the like, the invention provides the following technical scheme: a high-performance ferrite with Sr as its molecular formula(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19；
Wherein: a is 0.3 to 0.5, b is 0.02 to 0.1, c is 0.2 to 0.4, d is 0.05 to 0.15, x is 0.2 to 0.4, y is 0.05 to 0.2, and 2n-x-y is 9.5 to 11.5.
Preferably, the optimal range of a is 0.34-0.46, the proportion range of b, c and d, namely c/(2b + d), is 1.5-4.2, and the optimal range is 1.9-3.8; the optimal range of x is 0.25-0.38, and the optimal range of y is 0.08-0.17.
A preparation method of high-performance ferrite comprises the following steps:
the method comprises the following steps: high temperature pretreatment of raw materials
Keeping the raw materials of iron oxide, strontium carbonate, calcium carbonate, lanthanum oxide, cobalt oxide, praseodymium neodymium oxide, gadolinium oxide and zinc oxide at the high temperature of 300 ℃ for 1 hour respectively, then sealing and storing, and reducing the temperature of the raw materials to be below 60 ℃;
step two: ingredient weighing and wet grinding disintegrating
The preparation method comprises the following steps of mixing materials according to the molecular formula Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19The mole ratio of the permanent magnetic ferrite main phase raw material after high-temperature pretreatment in the first step is weighed: wherein a is 0.3-0.5, b is 0.02-0.1, c is 0.2-0.4, d is 0.05-0.15, x is 0.2-0.4, y is 0.05-0.2, and 2n-x-y is 9.5-11.5;
carrying out wet ball milling and crushing on the proportioned raw materials, adding a primary additive into the proportioned raw materials, putting the mixed materials into a wet ball mill for carrying out wet milling and crushing, and carrying out material crushing in the ball mill: water: the ball ratio is 1:1.2:3, the rotating speed of the ball mill is reduced to 22r/min after frequency conversion, and fine grinding is carried out for 1.5h to obtain slurry with the passing rate of a 200-mesh screen being 99%;
step three: dehydration treatment
Dehydrating the mixed material obtained in the step two by using a horizontal centrifuge, wherein the solid content of slurry obtained after dehydration is 67 wt%;
step four: step-by-step burn-in
Performing first-step granulation pre-sintering on the mixed material obtained after dehydration treatment in the third step in a first rotary kiln, controlling the pre-sintering temperature at 800-;
step five: crushing ball mill
Pre-sintering materials obtained in the fourth step are subjected to dry ball milling and crushing, then dispersing agents are added for secondary ball milling, and the ball milling is continued for 18 hours to obtain slurry;
step six: shaping of
Dehydrating the slurry obtained in the fifth step by using a centrifugal machine, wherein the solid content of the slurry obtained after dehydration is 73wt%, and then placing the obtained slurry in a 700KA/M magnetic field for compression molding;
step seven: sintering
And (3) carrying out heat treatment on the formed body in the sixth step at the temperature of 200 ℃, removing water, and then sintering in the atmosphere, wherein the sintering temperature is controlled to be 1190-1260 ℃, so as to obtain the sintered permanent magnet.
Preferably, the first additive in the second step is boric acid and silica powder, and the adding proportion of the first additive is 0.2kg of boric acid and 0.4kg of silica per 100kg of raw material.
Preferably, phi 4.8mm bearing steel is used for the balls in the wet ball mill in the second step.
Preferably, the dispersant in the fifth step is added according to the following weight ratio, and the total amount of the dispersant added per 100kg of the pre-sintering material is 0.1 kg.
Preferably, the dispersant in the fifth step is calcium gluconate or sorbitol.
(III) advantageous effects
Compared with the prior art, the invention provides a preparation method of high-performance ferrite, which has the following beneficial effects:
1. according to the preparation method of the high-performance ferrite, the raw materials of iron oxide, strontium carbonate, calcium carbonate, lanthanum oxide, cobalt oxide, praseodymium neodymium oxide, gadolinium oxide and zinc oxide are respectively subjected to heat preservation at the high temperature of 300 ℃ for 1 hour and then are stored in a sealing manner, so that the moisture and volatile substances in the raw materials can be effectively removed, the raw material proportion is more accurate, and the formula volatility is reduced.
2. According to the preparation method of the high-performance ferrite, steel balls with the particle size phi of 4.8mm are used in a ball mill for wet grinding and disintegration by virtue of ingredient weighing, and are subjected to speed reduction grinding, so that the molecular structure of the raw material can be maintained to a large extent, the passing rate of a 200-mesh screen is controlled, uniformly dispersed slurry is obtained, and the raw material is not easy to crystallize in a pre-sintering link.
3. According to the preparation method of the high-performance ferrite, the step-by-step pre-sintering method is adopted, when the first-step granulation pre-sintering is carried out, materials pass through slowly, the raw materials are fully decomposed and then rapidly pass through the second-step high-temperature pre-sintering stage to carry out solid-phase reaction, the influence of decomposed volatile matters of the raw materials on the solid-phase reaction is reduced, the obtained granular materials are more compact, and the performance is improved.
4. According to the preparation method of the high-performance ferrite, the obtained pre-sintering powder only needs to be added with a dispersing agent during secondary grinding, and the dispersing agent can improve the orientation of slurry particles during magnetic field forming, so that the slurry is easier to orient; different from the conventional ball milling process, the other additives such as calcium carbonate and silicon oxide are not added for the second time, but are added for the first time, which is beneficial to improving the performance.
5. The phase molecular formula of the high-performance ferrite prepared by the preparation method is specifically Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19The performance of permanent magnetic ferrite residual magnetism ≧ 4550 Gs intrinsic coercive force ≧ 5500 Oe is realized through the process of the pre-sintering material。
Drawings
FIG. 1 is a table showing the molecular formula of ferrite obtained by the method for preparing a high performance ferrite according to the present invention;
FIG. 2 is a table of magnetic properties of a method for preparing a high performance ferrite according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Referring to FIGS. 1-2, a high performance ferrite having a phase formula of Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19；
Wherein: a is 0.3 to 0.5, b is 0.02 to 0.1, c is 0.2 to 0.4, d is 0.05 to 0.15, x is 0.2 to 0.4, y is 0.05 to 0.2, and 2n-x-y is 9.5 to 11.5.
The optimal range of a is 0.34-0.46, the ratio range of b, c and d, namely c/(2b + d), is 1.5-4.2, and the optimal range is 1.9-3.8; the optimal range of x is 0.25-0.38, and the optimal range of y is 0.08-0.17.
A preparation method of high-performance ferrite comprises the following steps:
the method comprises the following steps: high temperature pretreatment of raw materials
Keeping the raw materials of iron oxide, strontium carbonate, calcium carbonate, lanthanum oxide, cobalt oxide, praseodymium neodymium oxide, gadolinium oxide and zinc oxide at the high temperature of 300 ℃ for 1 hour respectively, then sealing and storing, and reducing the temperature of the raw materials to be below 60 ℃;
step two: ingredient weighing and wet grinding disintegrating
The preparation method comprises the following steps of mixing materials according to the molecular formula Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19The mole ratio of the permanent magnetic ferrite main phase raw material after high-temperature pretreatment in the first step is weighed: wherein a is 0.3-0.5, b is 0.02-0.1, c is 0.2-0.4, d is 0.05-0.15, x is 0.2-0.4, y is 0.05-0.2, and 2n-x-y is 9.5-11.5;
carrying out wet ball milling and crushing on the proportioned raw materials, adding a primary additive into the proportioned raw materials, putting the mixed materials into a wet ball mill for carrying out wet milling and crushing, and carrying out material crushing in the ball mill: water: the ball ratio is 1:1.2:3, the rotating speed of the ball mill is reduced to 22r/min after frequency conversion, and fine grinding is carried out for 1.5h to obtain slurry with the passing rate of a 200-mesh screen being 99%;
step three: dehydration treatment
Dehydrating the mixed material obtained in the step two by using a horizontal centrifuge, wherein the solid content of slurry obtained after dehydration is 67 wt%;
step four: step-by-step burn-in
Performing first-step granulation pre-sintering on the mixed material obtained after dehydration treatment in the third step in a first rotary kiln, controlling the pre-sintering temperature at 800-;
step five: crushing ball mill
Pre-sintering materials obtained in the fourth step are subjected to dry ball milling and crushing, then dispersing agents are added for secondary ball milling, and the ball milling is continued for 18 hours to obtain slurry;
step six: shaping of
Dehydrating the slurry obtained in the fifth step by using a centrifugal machine, wherein the solid content of the slurry obtained after dehydration is 73wt%, and then placing the obtained slurry in a 700KA/M magnetic field for compression molding;
step seven: sintering
And (3) carrying out heat treatment on the formed body in the sixth step at the temperature of 200 ℃, removing water, and then sintering in the atmosphere, wherein the sintering temperature is controlled to be 1190-1260 ℃, so as to obtain the sintered permanent magnet.
In the second step, the primary additive is boric acid and silicon micropowder, and the addition proportion of the primary additive is that 0.2kg of boric acid and 0.4kg of silicon oxide are added into every 100kg of raw materials.
And D, using phi 4.8mm bearing steel for the balls in the wet ball mill in the step II.
In the fifth step, the dispersant is added according to the following weight ratio, and the total amount of the dispersant added in each 100kg of the pre-sintering material is 0.1 kg.
And the dispersant in the fifth step is calcium gluconate or sorbitol.
In conclusion, the preparation method of the high-performance ferrite can effectively remove water and volatile substances in raw materials by respectively preserving heat of the raw materials of iron oxide, strontium carbonate, calcium carbonate, lanthanum oxide, cobalt oxide, praseodymium neodymium oxide, gadolinium oxide and zinc oxide at the high temperature of 300 ℃ for 1 hour and then sealing and storing the raw materials, so that the proportion of the raw materials is more accurate, the formula fluctuation is reduced, bearing steel small-particle-size steel balls with the diameter of 4.8mm are used by a ball mill in the process of batching, weighing and wet grinding and crushing, the speed is reduced for grinding, the molecular structure of the raw materials can be greatly maintained, the passing rate of a 200-mesh screen is controlled to obtain uniformly dispersed slurry, the raw materials are not easy to crystallize in a pre-sintering link, the materials pass slowly in the process of first-step pre-sintering granulation, the raw materials are fully decomposed and then rapidly pass through a second-step high-temperature pre-sintering stage for solid phase reaction, the influence of the volatile matters decomposed by the raw materials on the solid phase reaction is reduced, the obtained granular material is more compact, the performance is improved, the dispersing agent is only needed to be added when the obtained pre-sintering powder is subjected to secondary grinding, the orientation of slurry particles during magnetic field forming can be improved by the dispersing agent, and the slurry is easier to orient; different from the conventional ball milling process, the calcium carbonate, the silicon oxide and the like which are other additives are not added for the second time but added for the first time, which is beneficial to improving the performance, and the phase molecular formula of the prepared high-performance ferrite is specifically Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19The permanent magnetic ferrite residual magnetism is not less than 4550 Gs intrinsic coercive force not less than 5500 Oe by the process of the pre-sintering material.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high performance ferrite characterized by: the phase molecular formula of the high-performance ferrite is specifically Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19；
Wherein: a is 0.3 to 0.5, b is 0.02 to 0.1, c is 0.2 to 0.4, d is 0.05 to 0.15, x is 0.2 to 0.4, y is 0.05 to 0.2, and 2n-x-y is 9.5 to 11.5.
2. A high performance ferrite as claimed in claim 1, wherein: the optimal range of a is 0.34-0.46, the proportion range of b, c and d, namely c/(2b + d), is 1.5-4.2, and the optimal range is 1.9-3.8; the optimal range of x is 0.25-0.38, and the optimal range of y is 0.08-0.17.
3. A preparation method of high-performance ferrite is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: high temperature pretreatment of raw materials
Keeping the raw materials of iron oxide, strontium carbonate, calcium carbonate, lanthanum oxide, cobalt oxide, praseodymium neodymium oxide, gadolinium oxide and zinc oxide at the high temperature of 300 ℃ for 1 hour respectively, then sealing and storing, and reducing the temperature of the raw materials to be below 60 ℃;
step two: ingredient weighing and wet grinding disintegrating
The preparation method comprises the following steps of mixing materials according to the molecular formula Sr(1-a-2b-c-d)CaaPrbNdbLacGddFe(2n-x-y)CoxZnyO19The mole ratio of the permanent magnetic ferrite main phase raw material after high-temperature pretreatment in the first step is weighed: wherein a is 0.3-0.5, b is 0.02-0.1, c is 0.2-0.4, d is 0.05-0.15, x is 0.2-0.4, y is 0.05-0.2, and 2n-x-y is 9.5-11.5;
carrying out wet ball milling and crushing on the proportioned raw materials, adding a primary additive into the proportioned raw materials, putting the mixed materials into a wet ball mill for carrying out wet milling and crushing, and carrying out material crushing in the ball mill: water: the ball ratio is 1:1.2:3, the rotating speed of the ball mill is reduced to 22r/min after frequency conversion, and fine grinding is carried out for 1.5h to obtain slurry with the passing rate of a 200-mesh screen being 99%;
step three: dehydration treatment
Dehydrating the mixed material obtained in the step two by using a horizontal centrifuge, wherein the solid content of slurry obtained after dehydration is 67 wt%;
step four: step-by-step burn-in
Performing first-step granulation pre-sintering on the mixed material obtained after dehydration treatment in the third step in a first rotary kiln, controlling the pre-sintering temperature at 800-;
step five: crushing ball mill
Pre-sintering materials obtained in the fourth step are subjected to dry ball milling and crushing, then dispersing agents are added for secondary ball milling, and the ball milling is continued for 18 hours to obtain slurry;
step six: shaping of
Dehydrating the slurry obtained in the fifth step by using a centrifugal machine, wherein the solid content of the slurry obtained after dehydration is 73wt%, and then placing the obtained slurry in a 700KA/M magnetic field for compression molding;
step seven: sintering
And (3) carrying out heat treatment on the formed body in the sixth step at the temperature of 200 ℃, removing water, and then sintering in the atmosphere, wherein the sintering temperature is controlled to be 1190-1260 ℃, so as to obtain the sintered permanent magnet.
4. The method for preparing high-performance ferrite according to claim 3, wherein the method comprises the following steps: in the second step, the primary additive is boric acid and silicon micropowder, and the addition proportion of the primary additive is that 0.2kg of boric acid and 0.4kg of silicon oxide are added into every 100kg of raw materials.
5. The method for preparing high-performance ferrite according to claim 3, wherein the method comprises the following steps: and D, using phi 4.8mm bearing steel for the balls in the wet ball mill in the step II.
6. The method for preparing high-performance ferrite according to claim 3, wherein the method comprises the following steps: and in the fifth step, the dispersing agent is added according to the following weight ratio, and the total amount of the dispersing agent added to each 100kg of the pre-sintering material is 0.1 kg.
7. The method for preparing high-performance ferrite according to claim 3, wherein the method comprises the following steps: and the dispersant in the fifth step is calcium gluconate or sorbitol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011578997.0A CN112645704B (en) | 2020-12-28 | 2020-12-28 | Preparation method of high-performance ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011578997.0A CN112645704B (en) | 2020-12-28 | 2020-12-28 | Preparation method of high-performance ferrite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112645704A true CN112645704A (en) | 2021-04-13 |
| CN112645704B CN112645704B (en) | 2023-02-03 |
Family
ID=75363469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011578997.0A Active CN112645704B (en) | 2020-12-28 | 2020-12-28 | Preparation method of high-performance ferrite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112645704B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180938A (en) * | 2022-08-01 | 2022-10-14 | 横店集团东磁股份有限公司 | Permanent magnetic ferrite pre-sintering material and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139766A (en) * | 1997-02-25 | 2000-10-31 | Tdk Corporation | Oxide magnetic material, ferrite particle, sintered magnet, bonded magnet, magnetic recording medium and motor |
| US6402980B1 (en) * | 1997-09-19 | 2002-06-11 | Tdk Corporation | Oxide magnetic material, ferrite particles, bonded magnet, sintered magnet, process for producing the same, and magnetic recording medium |
| US20070099033A1 (en) * | 2003-12-09 | 2007-05-03 | Yoshihiko Minachi | Ferrite magnetic material and ferrite sintered magnet |
| CN101013622A (en) * | 2005-12-19 | 2007-08-08 | Tdk株式会社 | Ferrite magnetic material |
| CN101106001A (en) * | 2006-06-19 | 2008-01-16 | 李凌峰 | Low-temperature coefficient permanent magnet ferrite material and its production method |
| CN102408229A (en) * | 2011-08-26 | 2012-04-11 | 中钢集团安徽天源科技股份有限公司 | Method for improving coercivity of permanent ferrite |
| CN102942357A (en) * | 2012-11-13 | 2013-02-27 | 安徽龙磁科技股份有限公司 | Preparation method of high-performance sintering permanent magnetic ferrite magnet |
| JP2017069259A (en) * | 2015-09-28 | 2017-04-06 | 日立金属株式会社 | Method for manufacturing calcium-lanthanum-cobalt based ferrite sintered magnet, and calcium-lanthanum-cobalt based ferrite sintered magnet |
| CN107673755A (en) * | 2017-10-31 | 2018-02-09 | 安徽龙磁科技股份有限公司 | A kind of preparation method of permanent-magnet ferrite |
| CN110937888A (en) * | 2019-12-17 | 2020-03-31 | 横店集团东磁股份有限公司 | High-performance permanent magnetic ferrite material with secondary pre-sintering of powder and preparation method thereof |
-
2020
- 2020-12-28 CN CN202011578997.0A patent/CN112645704B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139766A (en) * | 1997-02-25 | 2000-10-31 | Tdk Corporation | Oxide magnetic material, ferrite particle, sintered magnet, bonded magnet, magnetic recording medium and motor |
| US6402980B1 (en) * | 1997-09-19 | 2002-06-11 | Tdk Corporation | Oxide magnetic material, ferrite particles, bonded magnet, sintered magnet, process for producing the same, and magnetic recording medium |
| US20070099033A1 (en) * | 2003-12-09 | 2007-05-03 | Yoshihiko Minachi | Ferrite magnetic material and ferrite sintered magnet |
| CN101013622A (en) * | 2005-12-19 | 2007-08-08 | Tdk株式会社 | Ferrite magnetic material |
| CN101106001A (en) * | 2006-06-19 | 2008-01-16 | 李凌峰 | Low-temperature coefficient permanent magnet ferrite material and its production method |
| CN102408229A (en) * | 2011-08-26 | 2012-04-11 | 中钢集团安徽天源科技股份有限公司 | Method for improving coercivity of permanent ferrite |
| CN102942357A (en) * | 2012-11-13 | 2013-02-27 | 安徽龙磁科技股份有限公司 | Preparation method of high-performance sintering permanent magnetic ferrite magnet |
| JP2017069259A (en) * | 2015-09-28 | 2017-04-06 | 日立金属株式会社 | Method for manufacturing calcium-lanthanum-cobalt based ferrite sintered magnet, and calcium-lanthanum-cobalt based ferrite sintered magnet |
| CN107673755A (en) * | 2017-10-31 | 2018-02-09 | 安徽龙磁科技股份有限公司 | A kind of preparation method of permanent-magnet ferrite |
| CN110937888A (en) * | 2019-12-17 | 2020-03-31 | 横店集团东磁股份有限公司 | High-performance permanent magnetic ferrite material with secondary pre-sintering of powder and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李富瑞等: "熔盐法制备的锶铁氧体磁粉的形貌、结构及磁性", 《磁性材料及器件》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180938A (en) * | 2022-08-01 | 2022-10-14 | 横店集团东磁股份有限公司 | Permanent magnetic ferrite pre-sintering material and preparation method thereof |
| CN115180938B (en) * | 2022-08-01 | 2023-09-05 | 横店集团东磁股份有限公司 | Permanent ferrite pre-sintering material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112645704B (en) | 2023-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101552069A (en) | Magnetoplumbite permanent magnetic ferrite and method of producing the same | |
| EP3473606B1 (en) | Ferrite sintered magnet | |
| CN108101529A (en) | A kind of production method for shrinking smaller permanent magnetic ferrite magnet | |
| CN111960816B (en) | Preparation process of permanent magnetic ferrite | |
| CN107382303A (en) | A kind of preparation method and magnet of high-performance permanent-magnet ferrite magnet | |
| EP2715747A1 (en) | Magnetoplumbite-type ferrite magnetic material and segment-type permanent magnet derived therefrom | |
| CN104692786A (en) | Low-radial shrinkage ratio permanent magnetic ferrite magnet and preparation method thereof | |
| CN112209707A (en) | Preparation method of high-performance permanent magnetic ferrite | |
| CN110204326B (en) | Ferrite permanent magnet material with core-shell structure and preparation method thereof | |
| CN112645704B (en) | Preparation method of high-performance ferrite | |
| CN111533550A (en) | Ferrite sintered magnet | |
| CN112430081B (en) | High-saturation-flux-density soft magnetic ferrite material and preparation method thereof | |
| CN114014644A (en) | Calcium permanent magnetic ferrite material and preparation method thereof | |
| CN105967672A (en) | High-performance calcium strontium zinc barium ferrite and preparation method thereof | |
| CN110937888A (en) | High-performance permanent magnetic ferrite material with secondary pre-sintering of powder and preparation method thereof | |
| CN1022909C (en) | Method for producing permanent-magnet ferrite materials from magnetitie ore | |
| CN106083023B (en) | A kind of preparation method and product of high mechanical properties strontium ferrite magnet | |
| KR100909702B1 (en) | Oxide Magnetic Materials | |
| KR102430475B1 (en) | Method for preparing ferrite sintered magnet and ferrite sintered magnet | |
| CN101477869B (en) | Novel nickel zincium soft magnetic ferrite and manufacturing process thereof | |
| CN107010937A (en) | One kind contains Cu2+W-type ferrite material and its preparation | |
| US5053156A (en) | Process for producing ferrite powder for ferrite magnets | |
| CN111196720A (en) | Improved high-performance strontium ferrite for magnetic ring and preparation method thereof | |
| JP2000323317A (en) | Ferrite magnet and manufacture of powder thereof | |
| KR102406630B1 (en) | Method for preparing ferrite sintered magnet and ferrite sintered magnet |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240307 Address after: 231500 Factory Building 2, Industrial Zone, Guohe Town, Lujiang County, Hefei City, Anhui Province Patentee after: Anhui Longci New Material Technology Co.,Ltd. Country or region after: China Address before: 231521 Industrial Park, Guohe Town, Lujiang County, Hefei City, Anhui Province Patentee before: SINOMAG TECHNOLOGY Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |