CN109524259A - A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable - Google Patents
A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable Download PDFInfo
- Publication number
- CN109524259A CN109524259A CN201811354123.XA CN201811354123A CN109524259A CN 109524259 A CN109524259 A CN 109524259A CN 201811354123 A CN201811354123 A CN 201811354123A CN 109524259 A CN109524259 A CN 109524259A
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- stable
- thermosensitive magnetic
- electromagnetic property
- core preparation
- 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
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 39
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 33
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000227 grinding Methods 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 15
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000416 bismuth oxide Inorganic materials 0.000 claims abstract description 11
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims abstract description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 9
- 239000011701 zinc Substances 0.000 claims abstract description 9
- 239000008187 granular material Substances 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011787 zinc oxide Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 3
- 235000019441 ethanol Nutrition 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 2
- 230000003647 oxidation Effects 0.000 claims 2
- 238000007254 oxidation reaction Methods 0.000 claims 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 7
- 238000012797 qualification Methods 0.000 abstract description 4
- 229910018605 Ni—Zn Inorganic materials 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 22
- 238000010792 warming Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/58—Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Soft Magnetic Materials (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
The invention discloses a kind of thermosensitive magnetic core preparation methods that electromagnetic property is stable; include the following steps: to mix in iron oxide, zinc oxide, bismuth oxide, aluminium oxide; glycerol, ethanol water grinding is added, polyethylene glycol is added and continues to grind, rolls; it heats up under nitrogen protection; pre-burning, then heat up, it is sintered; cooling, grinding obtains any surface finish, impulse- free robustness, the thermosensitive magnetic core stable without granule foreign, the electromagnetic property without water mark.Zn is effectively reduced in such a way that pre-burning and sintering combine in the stable thermosensitive magnetic core preparation method of electromagnetic property proposed by the present invention2+Volatilization in system, is effectively fixed in lattice, and forms the similar ferritic fine and closely woven crystal structure of Ni-Zn, refines crystal grain, reduces sintering temperature, reduces the Curie temperature fluctuation of magnetic core, while the stabilization of electromagnetic property, product qualification rate are up to 90% or more.
Description
Technical field
The present invention relates to thermosensitive magnetic core technical field more particularly to a kind of thermosensitive magnetic core preparation sides that electromagnetic property is stable
Method.
Background technique
Thermosensitive magnetic core is widely used for the magnetosensitive of temperature-control range wider household electrical appliance such as electric cooker, electric heater etc. at present
Heat portective switch.Thermosensitive magnetic core material generally selects Mg-Cu-Zn ferrite height to lead material, and the magnetic permeability mu i of the material is 1000-
1350, the Curie temperature Tc fluctuation range of the material is 90 DEG C -100 DEG C.
But the magnetic core needs higher sintering temperature in blank sintering process, and sintering temperature is 1200-1240 DEG C, by
The Zn in sintering temperature height, crystal structure2+It is volatile, the unstability of its electromagnetic property is caused, product qualification rate is lower than 75%.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of preparations of thermosensitive magnetic core that electromagnetic property is stable
Zn is effectively reduced in such a way that pre-burning and sintering combine in method2+Volatilization in system, is effectively fixed in lattice, and
And the similar ferritic fine and closely woven crystal structure of Ni-Zn is formed, crystal grain is refined, sintering temperature is reduced, reduces Curie's temperature of magnetic core
Degree fluctuation, while the stabilization of electromagnetic property, product qualification rate are up to 90% or more.
A kind of stable thermosensitive magnetic core preparation method of electromagnetic property proposed by the present invention, include the following steps: by iron oxide,
Zinc oxide, bismuth oxide, aluminium oxide mixing are added glycerol, ethanol water grinding, polyethylene glycol are added and continues to grind, rolls, nitrogen
Heat up under gas shielded, pre-burning, then heat up is sintered and cooled, grinding obtain any surface finish, impulse- free robustness, without granule foreign, without water mark
The stable thermosensitive magnetic core of electromagnetic property.
Preferably, glycerol, ethanol water grinding 4-12min is added, grinding pressure is 0.04-0.08MPa.
Preferably, in burn-in process, heating rate is 1-2 DEG C/min, and calcined temperature is 320-400 DEG C, and burn-in time is
1-3h。
Preferably, in sintering process, heating rate is 2.3-3 DEG C/min, and sintering temperature is 700-820 DEG C, sintering time
For 1-4h.
Preferably, ethanol water concentration is 12-30wt%.
Preferably, iron oxide, zinc oxide, bismuth oxide, aluminium oxide, glycerol, ethanol water weight ratio be 40-100:
10-18:2-10:1-10:1-2:4-12.
Preferably, the partial size of iron oxide is 10-30 μm.
Present invention mixed grinding in ethanol water by iron oxide, zinc oxide, bismuth oxide, aluminium oxide, in matching for glycerol
Under conjunction, mutual degree of scatter is high, and can reach the combination of intermolecular degree, by rolling under the cooperation of polyethylene glycol,
Then the speed for first passing through 1-2 DEG C/min is warming up to 320-400 DEG C, and pre-burning 1-3h can effectively reduce Zn2+Waving in system
Hair, and can be effectively fixed in lattice, then be warming up to 700-820 DEG C using the speed of 2.3-3 DEG C/min, it is sintered 1-4h, is formed
The similar ferritic fine and closely woven crystal structure of Ni-Zn, refines crystal grain, reduces sintering temperature, reduce the Curie temperature wave of magnetic core
Dynamic, Curie temperature Tc fluctuation range is 92-97 DEG C, and the magnetosensitive heat portective switch temperature controlling range of application is small, magnetosensitive heat
Protective switch temperature controls high sensitivity, meets magnetosensitive heat portective switch to the requirement of magnetic core, electromagnetic property of the present invention
Stabilization, product qualification rate is up to 90% or more.
Specific embodiment
In the following, technical solution of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable includes the following steps: to aoxidize 40kg iron oxide, 18kg
Zinc, 2kg bismuth oxide, the mixing of 10kg aluminium oxide, are added 1kg glycerol, 12kg concentration as 12wt% ethanol water and grind 12min,
Grinding pressure is 0.04MPa, and 2kg polyethylene glycol is added and continues to grind 1min, rolls, from room temperature with 2 DEG C/min under nitrogen protection
Speed be warming up to 320 DEG C, pre-burning 3h, then be warming up to 820 DEG C with the speed of 2.3 DEG C/min, be sintered 1h, cool to room with the furnace
Temperature, grinding obtain any surface finish, impulse- free robustness, the thermosensitive magnetic core stable without granule foreign, the electromagnetic property without water mark.
Embodiment 2
A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable includes the following steps: 100kg iron oxide, 10kg oxygen
Change zinc, 10kg bismuth oxide, the mixing of 1kg aluminium oxide, 2kg glycerol, 4kg concentration be added as 30wt% ethanol water and grinds 4min,
Grinding pressure is 0.08MPa, and 1kg polyethylene glycol is added and continues to grind 2min, rolls, from room temperature with 1 DEG C/min under nitrogen protection
Speed be warming up to 400 DEG C, pre-burning 1h, then be warming up to 700 DEG C with the speed of 3 DEG C/min, be sintered 4h, cool to room temperature with the furnace,
Grinding obtains any surface finish, impulse- free robustness, the thermosensitive magnetic core stable without granule foreign, the electromagnetic property without water mark.
Embodiment 3
A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable includes the following steps: to aoxidize 60kg iron oxide, 16kg
Zinc, 4kg bismuth oxide, the mixing of 8kg aluminium oxide, are added 1.3kg glycerol, 10kg concentration as 18wt% ethanol water and grind 10min,
Grinding pressure is 0.05MPa, and 1.7kg polyethylene glycol is added and continues to grind 1.4min, rolls, from room temperature with 1.7 under nitrogen protection
DEG C/speed of min is warming up to 340 DEG C, pre-burning 2.5h, then is warming up to 800 DEG C with the speed of 2.4 DEG C/min, is sintered 2h, it is cold with furnace
But to room temperature, grinding obtains any surface finish, impulse- free robustness, the thermosensitive magnetic core stable without granule foreign, the electromagnetic property without water mark.
Embodiment 4
A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable includes the following steps: to aoxidize 80kg iron oxide, 12kg
Zinc, 8kg bismuth oxide, the mixing of 2kg aluminium oxide, are added 1.7kg glycerol, 6kg concentration as 24wt% ethanol water and grind 6min, grind
Mill pressure is 0.07MPa, and 1.3kg polyethylene glycol is added and continues to grind 1.6min, rolling, under nitrogen protection from room temperature with 1.3 DEG C/
The speed of min is warming up to 380 DEG C, pre-burning 1.5h, then is warming up to 720 DEG C with the speed of 2.8 DEG C/min, is sintered 3h, furnace cooling
To room temperature, grinding obtains any surface finish, impulse- free robustness, the thermosensitive magnetic core stable without granule foreign, the electromagnetic property without water mark.
Embodiment 5
A kind of thermosensitive magnetic core preparation method that electromagnetic property is stable includes the following steps: to aoxidize 70kg iron oxide, 14kg
Zinc, 6kg bismuth oxide, the mixing of 5kg aluminium oxide, are added 1.5kg glycerol, 8kg concentration as 21wt% ethanol water and grind 8min, grind
Mill pressure is 0.06MPa, and 1.5kg polyethylene glycol is added and continues to grind 1.5min, rolling, under nitrogen protection from room temperature with 1.5 DEG C/
The speed of min is warming up to 360 DEG C, pre-burning 2h, then is warming up to 760 DEG C with the speed of 2.6 DEG C/min, is sintered 2.5h, furnace cooling
To room temperature, grinding obtains any surface finish, impulse- free robustness, the thermosensitive magnetic core stable without granule foreign, the electromagnetic property without water mark.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of thermosensitive magnetic core preparation method that electromagnetic property is stable, which comprises the steps of: by iron oxide, oxygen
Change zinc, bismuth oxide, aluminium oxide mixing, glycerol, ethanol water grinding is added, polyethylene glycol is added and continues to grind, rolls, nitrogen
The lower heating of protection, pre-burning, then heat up are sintered and cooled, grinding obtain any surface finish, impulse- free robustness, without granule foreign, without water mark
The stable thermosensitive magnetic core of electromagnetic property.
2. the stable thermosensitive magnetic core preparation method of electromagnetic property according to claim 1, which is characterized in that glycerol, second is added
Alcohol solution grinds 4-12min, and grinding pressure is 0.04-0.08MPa.
3. the stable thermosensitive magnetic core preparation method of electromagnetic property according to claim 1 or claim 2, which is characterized in that burn-in process
In, heating rate is 1-2 DEG C/min, and calcined temperature is 320-400 DEG C, burn-in time 1-3h.
4. the stable thermosensitive magnetic core preparation method of any one of -3 electromagnetic properties according to claim 1, which is characterized in that sintering
In the process, heating rate is 2.3-3 DEG C/min, and sintering temperature is 700-820 DEG C, sintering time 1-4h.
5. the stable thermosensitive magnetic core preparation method of any one of -4 electromagnetic properties according to claim 1, which is characterized in that ethyl alcohol
Concentration of aqueous solution is 12-30wt%.
6. the stable thermosensitive magnetic core preparation method of any one of -5 electromagnetic properties according to claim 1, which is characterized in that oxidation
Iron, zinc oxide, bismuth oxide, aluminium oxide, glycerol, ethanol water weight ratio be 40-100:10-18:2-10:1-10:1-2:
4-12。
7. the stable thermosensitive magnetic core preparation method of any one of -6 electromagnetic properties according to claim 1, which is characterized in that oxidation
The partial size of iron is 10-30 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354123.XA CN109524259B (en) | 2018-11-14 | 2018-11-14 | Preparation method of thermosensitive magnetic core with stable electromagnetic property |
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| CN201811354123.XA CN109524259B (en) | 2018-11-14 | 2018-11-14 | Preparation method of thermosensitive magnetic core with stable electromagnetic property |
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| CN109524259A true CN109524259A (en) | 2019-03-26 |
| CN109524259B CN109524259B (en) | 2021-08-03 |
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| CN108251057A (en) * | 2018-01-30 | 2018-07-06 | 湖北海力天恒纳米科技有限公司 | Magnetic grinding liquid and preparation method thereof |
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