CN104310982A - Preparation method of manganese zinc ferrite with high mechanical strength - Google Patents

Preparation method of manganese zinc ferrite with high mechanical strength Download PDF

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Publication number
CN104310982A
CN104310982A CN201410536101.0A CN201410536101A CN104310982A CN 104310982 A CN104310982 A CN 104310982A CN 201410536101 A CN201410536101 A CN 201410536101A CN 104310982 A CN104310982 A CN 104310982A
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China
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preparation
mechanical strength
high mechanical
ferrite
zinc ferrite
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CN201410536101.0A
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赵新江
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Jingshi Magnetic Materials & Element Engineering Tech Research Co Ltd
Wuxi Spinel Magnetics Co Ltd
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Jingshi Magnetic Materials & Element Engineering Tech Research Co Ltd
Wuxi Spinel Magnetics Co Ltd
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Priority to CN201410536101.0A priority Critical patent/CN104310982A/en
Publication of CN104310982A publication Critical patent/CN104310982A/en
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
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    • 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
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    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3246—Stabilised zirconias, e.g. YSZ or cerium stabilised zirconia
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    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
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    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3256—Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
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    • 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
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    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Magnetic Ceramics (AREA)

Abstract

The invention discloses a preparation method of a manganese zinc ferrite with high mechanical strength. A main material is sequentially primarily ground, pre-fired, secondarily ground, granulated, moulded and sintered to obtain the manganese zinc ferrite. The main material is prepared from 50-55mol% Fe2O3, 35-43mol% of MnO and the balance of ZnO. The preparation method is characterized by comprising the following steps: during secondary grinding, mixing 0.02-0.40wt% of MoO3 based on total mass of the main material; and sintering a moulded semi-product on a magnet sheet made from a same material. Compared with the prior art, during secondary grinding, 0.02-0.40wt% of MoO3 is doped and the moulded semi-product is not directly paved on a setter plate but paved on the magnet sheet made from the same material so as to be sintered, so that the mechanical strength of the manganese zinc ferrite is remarkably improved.

Description

A kind of preparation method of high mechanical strength Mn-Zn ferrite
Technical field
The invention belongs to field of magnetic material, be specifically related to a kind of preparation method of high mechanical strength Mn-Zn ferrite.
Background technology
MnZn ferrite magnetic material is widely used in the basic industry of the national economy such as computer, communication, automatization and smart instrumentation, automotive electronics, illumination.Its output and usage quantity have become the major criterion of measurement national economy and Information Technology Development degree, and when recruitment is in short supply, automatic production has become inevitable trend, and this just has higher requirement to the physical strength of product.
Summary of the invention
The preparation that the object of the invention is existing Mn-Zn ferrite improves, and provides a kind of method preparing high mechanical strength Mn-Zn ferrite.
It is as follows that the present invention realizes the technical scheme that above-mentioned purpose adopts:
A preparation method for high mechanical strength Mn-Zn ferrite, major ingredient obtains Mn-Zn ferrite, consisting of of described major ingredient: 50 ~ 55mol%Fe through sand milling, pre-burning, secondary sand milling, granulation, shaping and sintering successively 2o 3, 35 ~ 43mol%MnO, remainder is ZnO, and its feature is, when secondary sand milling, by the total mass of major ingredient, mixes the MoO of 0.02 ~ 0.40wt% 3, and shaping after work in-process be layered on equivalent material magnetic sheet on sinter.
Further, during secondary sand milling, by the total mass of major ingredient, also mix CaCO 3: 0.02 ~ 0.1wt%; Nb 2o 5: 0.02 ~ 0.05 wt%; CoO 3: 0 ~ 0.03 wt%; ZrO 2: 0.02 ~ 0.40 wt%.
Compared with prior art, the present invention mixes the MoO of 0.02 ~ 0.40wt% when secondary sand milling 3, and shaping after work in-process be not directly layered on load bearing board, but the magnetic sheet being layered on equivalent material to sinter, the physical strength of Mn-Zn ferrite can be significantly improved.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further details.
" magnetic sheet of equivalent material " of the present invention refers to the magnetic sheet that its moiety is identical with the moiety of described high mechanical strength Mn-Zn ferrite.
The preparation process of existing Mn-Zn ferrite is generally as follows:
(1) 50-55mol% Fe pressed by major ingredient 2o 3, 35-43mol% MnO, remainder is ZnO, takes, and major ingredient sand mill is carried out a sand milling, about 30 minutes time;
(2) then add by the 10wt% of major ingredient the PVA solution that concentration is 8 ~ 9wt%, stir, spraying dry makes particle;
(3) step (2) gained particle sends into rotary kiln again, at 850-980 DEG C, carry out pre-burning;
(4) the particle sand mill after pre-burning carries out secondary sand milling, and median size controls at 0.7 ~ 1 micron, when secondary sand milling, by the total mass of major ingredient, generally mixes CaCO as required 3: 0.02 ~ 0.1wt%; Nb 2o 5: 0.02 ~ 0.05 wt%; CoO 3: 0 ~ 0.03 wt%; ZrO 2: 0.02 ~ 0.40 wt%;
(5), after the particle diameter of secondary sand milling reaches requirement, mist projection granulating, makes 40-160 object finished particle powder;
(6) powder of step (5) is shaping, and gained work in-process repave on load bearing board, sends in atmosphere furnace and sinters at 1340-1380 DEG C.
When the preparation of the present invention to existing Mn-Zn ferrite improves, find when other processing condition are different, mix the MoO of 0.02 ~ 0.40wt% when secondary sand milling by the total mass of major ingredient 3, and shaping after work in-process be not directly layered on load bearing board, but the magnetic sheet being layered on equivalent material to sinter, the physical strength of Mn-Zn ferrite can be significantly improved.
Embodiment 1
As above, wherein, 50mol% Fe pressed by major ingredient to preparation process 2o 3, 40mol% MnO, remaining takes for ZnO; During secondary sand milling, mix MoO 3: 0.2%, CaCO 3: 0.1wt%, Nb 2o 5: 0.03wt%, ZrO 2: 0.02wt%; And work in-process be layered on equivalent material magnetic sheet on sinter.
The situation identical in other processing condition carries out following contrast experiment:
Comparative example 1
As above, wherein, 50mol% Fe pressed by major ingredient to preparation process 2o 3, 40mol% MnO, remaining takes for ZnO; During secondary sand milling, mix CaCO 3: 0.1wt%, Nb 2o 5: 0.03wt%, ZrO 2: 0.02wt%; And the magnetic sheet that work in-process are layered on equivalent material sinters.
Comparative example 2
As above, wherein, 50mol% Fe pressed by major ingredient to preparation process 2o 3, 40mol% MnO, remaining takes for ZnO; During secondary sand milling, mix MoO 3: 0.2%, CaCO 3: 0.1wt%, Nb 2o 5: 0.03wt%, ZrO 2: 0.02wt%, work in-process are layered on traditional load bearing board to sinter.
Experimental result:
。
As can be seen from above-mentioned experimental result, and only mix MoO 3, or only compare with the magnetic sheet support sintering of equivalent material, Mn-Zn ferrite is mixing MoO 3after, the magnetic sheet support sintering of work in-process equivalent material simultaneously, the physical strength of obtained magnetic core improves more than 40%.

Claims (3)

1. a preparation method for high mechanical strength Mn-Zn ferrite, major ingredient obtains Mn-Zn ferrite, consisting of of described major ingredient: 50 ~ 55mol%Fe through sand milling, pre-burning, secondary sand milling, granulation, shaping and sintering successively 2o 3, 35 ~ 43mol%MnO, remainder is ZnO, it is characterized in that, when secondary sand milling, by the total mass of major ingredient, mixes the MoO of 0.02 ~ 0.40wt% 3, and shaping after work in-process be layered on equivalent material magnetic sheet on sinter.
2. the preparation method of high mechanical strength Mn-Zn ferrite according to claim 1, is characterized in that, during secondary sand milling, by the total mass of major ingredient, also mix CaCO 3: 0.02 ~ 0.1wt%; Nb 2o 5: 0.02 ~ 0.05 wt%; CoO 3: 0 ~ 0.03 wt%; ZrO 2: 0.02 ~ 0.40 wt%.
3. the preparation method of high mechanical strength Mn-Zn ferrite according to claim 1, is characterized in that, the temperature 850-980 DEG C of described pre-burning.
CN201410536101.0A 2014-10-13 2014-10-13 Preparation method of manganese zinc ferrite with high mechanical strength Pending CN104310982A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113999001A (en) * 2021-11-16 2022-02-01 广东羚光新材料股份有限公司 Burning bearing plate and preparation method and application thereof

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
任平等: "微量成分添加对锰锌铁氧体性能影响研究进展", 《材料导报：综述篇》 *
姬海宁等: "宽温低损耗MnZn功率铁氧体的发展与研究", 《材料导报》 *
彭长宏等: "掺杂对高导锰锌铁氧体磁性能的影响", 《中南大学学报（自然科学版）》 *
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113999001A (en) * 2021-11-16 2022-02-01 广东羚光新材料股份有限公司 Burning bearing plate and preparation method and application thereof

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Application publication date: 20150128