CN104671769A - Method for preparing MnZn ferrite soft magnetic material - Google Patents
Method for preparing MnZn ferrite soft magnetic material Download PDFInfo
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- CN104671769A CN104671769A CN201410689570.6A CN201410689570A CN104671769A CN 104671769 A CN104671769 A CN 104671769A CN 201410689570 A CN201410689570 A CN 201410689570A CN 104671769 A CN104671769 A CN 104671769A
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Abstract
The invention relates to the technical field of powder metallurgy, particularly a method for preparing a MnZn ferrite soft magnetic material. The method comprises the following steps: raw material preparation; preheating; die pressing; heating; and molding. In the microwave sintering MnZn ferrite powder compacting process, the initial domain-state-structure gradually orientates toward the external field under the action of the microwave field, and covers the whole region as the temperature increases; and finally, the small regions develop into crystal grains, and thus, the size of the initial domain-state-structure determines the size of the final crystal grain to great extent. The microwave sintering MnZn ferrite powder compacting process can implement quick sintering compactness, and can obtain the compact uniform structure at 1400 DEG C since the temperature has great influence on density.
Description
Technical field
The present invention relates to powder metallurgical technology, be specifically related to a kind of method preparing MnZn soft magnetic ferrites.
Background technology
Microwave Sintering Techniques is a kind of novel, the clean sintering technology grown up in recent years.When microwave sintering is the electromagnetic field couples based on the basic microtexture of material and CF, interior microscopic particle responds electromagnetic oscillation, thermal motion aggravates, and material is heat energy because dielectric loss absorbs microwave energy.Normal sintering relies on heating element by convection current, conduction, radiative transfer, and material is heated from outside to inside, and ask relatively long during sintering, crystal grain is more easily grown up.
Sintering is the extremely important technological process of this material of preparation, and in traditional heating process, material surface, inside and central zone temperature exist larger gradient, and easily cause crystal grain uneven, inside exists more defect.
Summary of the invention
The present invention is intended to propose a kind of method preparing MnZn soft magnetic ferrites.
Technical program of the present invention lies in:
Prepare a method for MnZn soft magnetic ferrites, comprise the following steps:
Step 1: prepared by starting material: with m (Fe
20
3): m (Zn0): m (MnC0
3)=63.32%:13.97%:22.71% is as raw material; With balance accurate weighing raw 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; Material 30g; Liquid 60g;
After ball milling, material dry 24h at the temperature of 80 DEG C, grinds afterwards;
Step 2: preheating: the material of grinding is put into corundum crucible and is placed in retort furnace and carry out preheating, material furnace cooling after pre-burning;
Step 3: mold pressing: take out preburning powdered material and also grind, the stamping of powder after grinding is configured as external diameter 15.1 mm, thickness 3.3 ~ 3.4mm wafer sample for subsequent use;
Step 4: heating: be placed on by pressed compact on aluminum oxide burning plate, annulus sample intermediate sleeve puts wafer sample, places silicon carbide plate as auxiliary hot material around pressed compact; Be placed on heating in microwave oven;
Step 5: shaping: namely the top temperature being heated to setting when sample stops heating, and sample furnace cooling is to room temperature afterwards, takes out sample subsequently.
Preferably, described ball-milling medium is the mixture of dehydrated alcohol and deionized water, and the mass ratio of dehydrated alcohol and deionized water is 1:3; Ball-milling Time is 10h.
Preferably, the Constant Temp. Oven of 202-6 is selected in the drying in described step 1.
Or preferably, described preheating temperature is 900 DEG C, and the time is 2h.
Technique effect of the present invention is:
During microwave sintering MnZn ferrite powder pressed compact, initial farmland shape structure is under microwave field effect, progressively orientation is tending towards foreign field, and be covered with whole region with temperature rising, these zonules last develop into crystal grain, and the size of initial farmland shape structure determines the size of last crystal grain to a great extent.Microwave sintering MnZn ferrite powder pressed compact can realize Fast Sintering densification, and the impact of temperature on density is comparatively large, can obtain densification at 1400 DEG C, organizes uniformly.
Embodiment
Prepare a method for MnZn soft magnetic ferrites, comprise the following steps:
Step 1: prepared by starting material: with m (Fe
20
3): m (Zn0): m (MnC0
3)=63.32%:13.97%:22.71% is as raw material; With balance accurate weighing raw 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; Material 30g; Liquid 60g;
After ball milling, material dry 24h at the temperature of 80 DEG C, grinds afterwards;
Step 2: preheating: the material of grinding is put into corundum crucible and is placed in retort furnace and carry out preheating, material furnace cooling after pre-burning;
Step 3: mold pressing: take out preburning powdered material and also grind, the stamping of powder after grinding is configured as external diameter 15.1 mm, thickness 3.3 ~ 3.4mm wafer sample for subsequent use;
Step 4: heating: be placed on by pressed compact on aluminum oxide burning plate, annulus sample intermediate sleeve puts wafer sample, places silicon carbide plate as auxiliary hot material around pressed compact; Be placed on heating in microwave oven;
Step 5: shaping: namely the top temperature being heated to setting when sample stops heating, and sample furnace cooling is to room temperature afterwards, takes out sample subsequently.
Wherein, described ball-milling medium is the mixture of dehydrated alcohol and deionized water, and the mass ratio of dehydrated alcohol and deionized water is 1:3; Ball-milling Time is 10h.The Constant Temp. Oven of 202-6 is selected in drying.Preheating temperature is 900 DEG C, and the time is 2h.
Claims (4)
1. prepare a method for MnZn soft magnetic ferrites, it is characterized in that: comprise the following steps:
Step 1: prepared by starting material: with m (Fe
20
3): m (Zn0): m (MnC0
3)=63.32%:13.97%:22.71% is as raw material; With balance accurate weighing raw 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; Material 30g; Liquid 60g;
After ball milling, material dry 24h at the temperature of 80 DEG C, grinds afterwards;
Step 2: preheating: the material of grinding is put into corundum crucible and is placed in retort furnace and carry out preheating, material furnace cooling after pre-burning;
Step 3: mold pressing: take out preburning powdered material and also grind, the stamping of powder after grinding is configured as external diameter 15.1 mm, thickness 3.3 ~ 3.4mm wafer sample for subsequent use;
Step 4: heating: be placed on by pressed compact on aluminum oxide burning plate, annulus sample intermediate sleeve puts wafer sample, places silicon carbide plate as auxiliary hot material around pressed compact; Be placed on heating in microwave oven;
Step 5: shaping: namely the top temperature being heated to setting when sample stops heating, and sample furnace cooling is to room temperature afterwards, takes out sample subsequently.
2. as claim 1 one kind prepares the method for MnZn soft magnetic ferrites, it is characterized in that: described ball-milling medium is the mixture of dehydrated alcohol and deionized water, the mass ratio of dehydrated alcohol and deionized water is 1:3; Ball-milling Time is 10h.
3., as claim 1 one kind prepares the method for MnZn soft magnetic ferrites, it is characterized in that: the Constant Temp. Oven of 202-6 is selected in the drying in described step 1.
4. as claim 1 one kind prepares the method for MnZn soft magnetic ferrites, it is characterized in that: described preheating temperature is 900 DEG C, and the time is 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410689570.6A CN104671769A (en) | 2014-11-26 | 2014-11-26 | Method for preparing MnZn ferrite soft magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410689570.6A CN104671769A (en) | 2014-11-26 | 2014-11-26 | Method for preparing MnZn ferrite soft magnetic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104671769A true CN104671769A (en) | 2015-06-03 |
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ID=53307425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410689570.6A Pending CN104671769A (en) | 2014-11-26 | 2014-11-26 | Method for preparing MnZn ferrite soft magnetic material |
Country Status (1)
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| CN (1) | CN104671769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816734A (en) * | 2021-10-08 | 2021-12-21 | 横店集团东磁股份有限公司 | NiCuZn ferrite material and preparation method and application thereof |
-
2014
- 2014-11-26 CN CN201410689570.6A patent/CN104671769A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816734A (en) * | 2021-10-08 | 2021-12-21 | 横店集团东磁股份有限公司 | NiCuZn ferrite material and preparation method and application thereof |
| CN113816734B (en) * | 2021-10-08 | 2023-02-17 | 横店集团东磁股份有限公司 | NiCuZn ferrite material and preparation method and application thereof |
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Application publication date: 20150603 |