CN107935580A - A kind of method for preparing MnZn soft magnetic ferrites - Google Patents

A kind of method for preparing MnZn soft magnetic ferrites Download PDF

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Publication number
CN107935580A
CN107935580A CN201711140266.6A CN201711140266A CN107935580A CN 107935580 A CN107935580 A CN 107935580A CN 201711140266 A CN201711140266 A CN 201711140266A CN 107935580 A CN107935580 A CN 107935580A
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China
Prior art keywords
soft magnetic
ball
sample
magnetic ferrites
preparing
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Application number
CN201711140266.6A
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Chinese (zh)
Inventor
王耀斌
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Shaanxi Shengmai Petroleum Co Ltd
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Shaanxi Shengmai Petroleum Co Ltd
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Priority to CN201711140266.6A priority Critical patent/CN107935580A/en
Publication of CN107935580A publication Critical patent/CN107935580A/en
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    • 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
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
    • 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
    • C04B35/64—Burning or sintering processes
    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/34—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 soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—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 soft-magnetic materials non-metallic substances, e.g. ferrites 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
    • 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
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/667—Sintering using wave energy, e.g. microwave sintering

Abstract

The present invention relates to powder metallurgical technology, and in particular to a kind of method for preparing MnZn soft magnetic ferrites.A kind of method for preparing MnZn soft magnetic ferrites, comprises the following steps：It is prepared by raw material；Preheating；Molding；Heating；Shaping.During microwave sintering MnZn ferrite powder pressed compacts, for initial farmland shape structure under microwave field action, progressively orientation tends to external magnetic field, and is covered with whole region with temperature rise, these last zonules develop into crystal grain, and the size of initial farmland shape structure largely determines the size of last crystal grain.Microwave sintering MnZn ferrite powders pressed compact can realize Fast Sintering densification, and temperature on density has a great influence, and fine and close, uniform tissue can be obtained at 1400 DEG C.

Description

A kind of method for preparing MnZn soft magnetic ferrites
Technical field
The present invention relates to powder metallurgical technology, and in particular to a kind of method for preparing MnZn soft magnetic ferrites.
Background technology
Microwave Sintering Techniques are a kind of new, the clean sintering technologies to grow up in recent years.Microwave sintering is to be based on Interior microscopic particle response electromagnetic viscosimeter, warm-up movement add during the electromagnetic field couples of the basic fine structure of material and specific frequency Play, material are thermal energy because dielectric loss absorbs microwave energy.Normal sintering is to pass through convection current, conduction, radiation by heater Heat transfer, material is heated from outside to inside, and when sintering asks relatively long, and crystal grain is easier to grow up.
Sintering is to prepare the extremely important technical process of the material, during traditional heating, material surface, inside and in Heart regional temperature is easy to cause that crystal grain is uneven, and there are more defect for inside there are larger gradient.
The content of the invention
A kind of the present invention is directed to propose method of microwave sintering for MnZn soft magnetic ferrites.
Technical program of the present invention lies in：
A kind of method for preparing MnZn soft magnetic ferrites, comprises the following steps：
Step 1：It is prepared by raw material：With m (Fe203)：m(Zn0)：m(MnC03)=63.32%：13.97%：22.71% as former Material；With balance accurate weighing material powder, and ball milling is carried out to it；Ball feed liquid mass ratio is m (ball)：M (material)：M (liquid)=2：1： 2, i.e. ball 60g；Expect 30g；Liquid 60g；
Material dry 24h at a temperature of 80 DEG C, is ground afterwards after ball milling；
Step 2：Preheating：The material of grinding is put into corundum crucible to be placed in being preheated in Muffle furnace, material is with stove after pre-burning Cooling；
Step 3：Molding：Take out preburning powdered material and grind, the stamping of powder after grinding is configured to 15.1 mm of outside diameter, thickness 3.3 The wafer sample of~3.4mm is spare；
Step 4：Heating：Pressed compact is placed on aluminum oxide burning plate, annulus sample intermediate sleeve puts wafer sample, is put around pressed compact Silicon carbide plate is put as auxiliary hot material；It is placed on heating in microwave oven；
Step 5：Shaping：The maximum temperature that setting is heated to when sample stops heating, sample furnace cooling afterwards to room temperature, Then take out sample.
Preferably, the ball-milling medium is the mixture of absolute ethyl alcohol and deionized water, absolute ethyl alcohol and deionized water Mass ratio be 1：3；Ball-milling Time is 10h.
Preferably, the dry Constant Temp. Oven for selecting 202-6 in the step 1.
Or preferably, the preheating temperature is 900 DEG C, and the time is 2h.
The technical effects of the invention are that：
During microwave sintering MnZn ferrite powder pressed compacts, initial farmland shape structure is under microwave field action, and progressively orientation tends to be outer Magnetic field, and it is covered with whole region with temperature rise, these last zonules develop into crystal grain, and the size of initial farmland shape structure exists It has been largely fixed the size of last crystal grain.Microwave sintering MnZn ferrite powders pressed compact can realize that Fast Sintering causes Close, temperature on density has a great influence, and fine and close, uniform tissue can be obtained at 1400 DEG C.
Embodiment
A kind of method for preparing MnZn soft magnetic ferrites, comprises the following steps：
Step 1：It is prepared by raw material：With m (Fe203)：m(Zn0)：m(MnC03)=63.32%：13.97%：22.71% as former Material；With balance accurate weighing material powder, and ball milling is carried out to it；Ball feed liquid mass ratio is m (ball)：M (material)：M (liquid)=2：1： 2, i.e. ball 60g；Expect 30g；Liquid 60g；
Material dry 24h at a temperature of 80 DEG C, is ground afterwards after ball milling；
Step 2：Preheating：The material of grinding is put into corundum crucible to be placed in being preheated in Muffle furnace, material is with stove after pre-burning Cooling；
Step 3：Molding：Take out preburning powdered material and grind, the stamping of powder after grinding is configured to 15.1 mm of outside diameter, thickness 3.3 The wafer sample of~3.4mm is spare；
Step 4：Heating：Pressed compact is placed on aluminum oxide burning plate, annulus sample intermediate sleeve puts wafer sample, is put around pressed compact Silicon carbide plate is put as auxiliary hot material；It is placed on heating in microwave oven；
Step 5：Shaping：The maximum temperature that setting is heated to when sample stops heating, sample furnace cooling afterwards to room temperature, Then take out sample.
Wherein, the ball-milling medium for absolute ethyl alcohol and deionized water mixture, absolute ethyl alcohol and deionized water Mass ratio is 1：3；Ball-milling Time is 10h.The dry Constant Temp. Oven for selecting 202-6.Preheating temperature is 900 DEG C, the time It is 2h.

Claims (4)

  1. A kind of 1. method for preparing MnZn soft magnetic ferrites, it is characterised in that：Comprise the following steps：
    Step 1：It is prepared by raw material：With m (Fe203)：m(Zn0)：m(MnC03)=63.32%：13.97%：22.71% as former Material；With balance accurate weighing material powder, and ball milling is carried out to it；Ball feed liquid mass ratio is m (ball)：M (material)：M (liquid)=2：1： 2, i.e. ball 60g；Expect 30g；Liquid 60g；
    Material dry 24h at a temperature of 80 DEG C, is ground afterwards after ball milling；
    Step 2：Preheating：The material of grinding is put into corundum crucible to be placed in being preheated in Muffle furnace, material is with stove after pre-burning Cooling；
    Step 3：Molding：Take out preburning powdered material and grind, the stamping of powder after grinding is configured to 15.1 mm of outside diameter, thickness 3.3 The wafer sample of~3.4mm is spare；
    Step 4：Heating：Pressed compact is placed on aluminum oxide burning plate, annulus sample intermediate sleeve puts wafer sample, is put around pressed compact Silicon carbide plate is put as auxiliary hot material；It is placed on heating in microwave oven；
    Step 5：Shaping：The maximum temperature that setting is heated to when sample stops heating, sample furnace cooling afterwards to room temperature, Then take out sample.
  2. 2. such as a kind of method for preparing MnZn soft magnetic ferrites of claim 1, it is characterised in that：The ball-milling medium is The mass ratio of the mixture of absolute ethyl alcohol and deionized water, absolute ethyl alcohol and deionized water is 1：3；Ball-milling Time is 10h.
  3. 3. such as a kind of method for preparing MnZn soft magnetic ferrites of claim 1, it is characterised in that：In the step 1 The dry Constant Temp. Oven for selecting 202-6.
  4. 4. such as a kind of method for preparing MnZn soft magnetic ferrites of claim 1, it is characterised in that：The preheating temperature is 900 DEG C, the time is 2h.
CN201711140266.6A 2017-11-16 2017-11-16 A kind of method for preparing MnZn soft magnetic ferrites Withdrawn CN107935580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711140266.6A CN107935580A (en) 2017-11-16 2017-11-16 A kind of method for preparing MnZn soft magnetic ferrites

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711140266.6A CN107935580A (en) 2017-11-16 2017-11-16 A kind of method for preparing MnZn soft magnetic ferrites

Publications (1)

Publication Number Publication Date
CN107935580A true CN107935580A (en) 2018-04-20

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CN (1) CN107935580A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116730716A (en) * 2023-05-25 2023-09-12 日照亿鑫电子材料有限公司 Microwave sintering manganese zinc ferrite and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116730716A (en) * 2023-05-25 2023-09-12 日照亿鑫电子材料有限公司 Microwave sintering manganese zinc ferrite and preparation method thereof

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Application publication date: 20180420

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