CN111383811A - Manganese-zinc ferrite magnetic material and production process thereof - Google Patents

Manganese-zinc ferrite magnetic material and production process thereof Download PDF

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CN111383811A
CN111383811A CN202010151093.3A CN202010151093A CN111383811A CN 111383811 A CN111383811 A CN 111383811A CN 202010151093 A CN202010151093 A CN 202010151093A CN 111383811 A CN111383811 A CN 111383811A
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face
manganese
magnetic material
ferrite magnetic
zinc
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黄国祥
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Huzhouke Electro Magnetic Industry Co ltd
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Huzhouke Electro Magnetic Industry Co ltd
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    • H—ELECTRICITY
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    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
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    • 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
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    • H01F41/02—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 for manufacturing cores, coils, or magnets
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Abstract

The invention discloses a manganese-zinc ferrite magnetic material which comprises an upper end surface, a lower end surface and a central connecting rod, wherein the upper end surface is provided with a first magnetic core; the upper end face is provided with a plurality of connecting holes, the connecting holes are uniformly arranged on the upper end face, the lower end face is provided with connecting holes with positions and sizes matched with those of the upper end face, the upper end face and the lower end face are both of a disc-shaped structure, a plurality of guide grooves are arranged on the disc-shaped circumferences of the upper end face and the lower end face, and the number of the guide grooves is matched with that of the connecting holes; the manganese-zinc ferrite magnetic material and the production process provided by the application can enable the manganese-zinc ferrite magnetic material to have high saturation magnetic flux density, good wide temperature and direct current superposition characteristics under the condition of high magnetic permeability.

Description

Manganese-zinc ferrite magnetic material and production process thereof
Technical Field
The invention relates to the technical field of manganese-zinc ferrite magnetic materials, in particular to a manganese-zinc ferrite magnetic material and a production process thereof.
Background
The manganese zinc ferrite magnetic material is a soft magnetic material widely used in the communication field and the sensor field, electronic devices manufactured by the manganese zinc ferrite magnetic material are often applied as anti-interference elements, and the electronic devices manufactured by the manganese zinc ferrite magnetic material have good inhibition effect on high-frequency signals. The trend toward miniaturization of modern electronic devices and the like is advancing, and higher requirements are put on the magnetic properties of manganese-zinc ferrite magnetic materials.
The manganese-zinc ferrite has excellent temperature sensing performance, and can be made into a high-performance temperature sensor by utilizing the characteristic that the manganese-zinc ferrite can have violent magnetic change when the temperature is slightly changed; and the manganese-zinc ferrite has certain magnetic conductivity, and the temperature difference of the manganese-zinc ferrite is larger between different application environments, so that a relatively stable manganese-zinc ferrite magnetic material needs to be prepared, the magnetic wide-temperature characteristic of the manganese-zinc ferrite is improved, and the application range of the manganese-zinc ferrite magnetic material is widened.
The properties of manganese zinc ferrite magnetic materials depend to a large extent on their chemical composition, microstructure and morphology and their homogeneity. Therefore, the preparation of high quality manganese-zinc-ferrite becomes very important in the fabrication of high performance temperature sensors.
Disclosure of Invention
The invention provides a manganese-zinc ferrite magnetic material and a production process thereof, aiming at the problems.
The scheme is realized as follows: a manganese-zinc ferrite magnetic material comprises an upper end face, a lower end face and a central connecting rod; the utility model discloses a fixing device for the connection of a plurality of terminal surfaces, including up end, connecting hole, terminal surface, upper end face, connecting hole, the up end face is provided with a plurality of connecting holes, the connecting hole evenly sets up on the up end face, the terminal surface is provided with down and meets up end position, size assorted connecting hole, the up and down terminal surface is disc structure, be provided with a plurality of guide ways on the disc circumference of up end and terminal surface down, the number of guide way and the number.
Preferably, the guide grooves on the upper end surface and the lower end surface are arranged to penetrate through the end surfaces, and each guide groove on the upper end surface and each guide groove on the lower end surface are arranged in a matching manner.
Preferably, the upper end face comprises an upper surface, a lower surface and a wall surface, the connecting hole is formed in the upper surface, the connecting hole extends for a distance from the upper surface to the lower surface, the guide grooves are evenly formed in the annular wall surface and are of arc-shaped structures, the lower surface is connected with the central connecting rod, and the lower surface is in arc transition with the central connecting rod.
Preferably, the number of the connecting holes is 3, the 3 connecting holes are distributed on the upper end face in a triangular mode, the number of the guide grooves is 3, and each guide groove is arranged on the circumference of the upper end face between the adjacent connecting holes.
Preferably, the central connecting rod is arranged at the central position of the upper end surface and the lower end surface, and the diameter of the central connecting rod is not less than 1/4 of the diameter of the upper end surface and the lower end surface.
The invention also provides a production process of the manganese-zinc ferrite magnetic material, which comprises the following specific steps:
the method comprises the following steps: raw material Fe2O3Mixing MnO, ZnO and CaCO3 to obtain a mixture;
step two: pressing the mixture into a spherical or cylindrical shape by compression to enable the mixture to have certain strength, and then fully pre-burning the pressed forming block in a track kiln to prepare a primary pre-burning material; the time of the pre-sintering process is 5 hours, and the highest temperature of the pre-sintering process is 800 ℃;
step three: adding a certain amount of one or the combination of two of SiO and WO impurities into the pre-sintering material;
step four: adding deionized water into the mixed materials such as the impurity mixed materials, sanding the mixed materials in a ball mill for 60 minutes, pumping the mixed materials into a stirrer, adding PVA solution with the weight of 8wt% of the main component, stirring the mixture for 2 hours, drying the mixture, and pre-sintering the dried powder for 3 hours at the temperature of 700 ℃;
step five: pressing and forming granular powder by using a die and a press, gradually pushing the pressed and formed part into a double-push air kiln, performing a glue discharging process, removing moisture and polyvinyl alcohol glue of the magnetic ring green body, pushing a push plate in the double-push air kiln once every 1200 seconds, and controlling the highest temperature in the double-push air kiln at 750 ℃ so that the moisture and the PVA glue are completely removed from the magnetic ring green body and a primary reaction occurs, wherein the product has certain hardness and can enhance the stability of the product;
step six: performing surface smoothing treatment on the magnetic ring green compact after rubber discharge in a chamfering rotary machine, wherein the chamfering frequency is 30Hz, so that the surface of the magnetic ring green compact has no edges and corners, and the magnetic conductivity can be improved;
step seven: the green body was sintered at 1300 ℃ for 3 hours at 3% oxygen partial pressure.
In step one, the Fe2O3MnO and ZnO are as follows by mass percent: fe2O355 wt% -70 wt%, MnO: 30-10 wt%, CaCO 3: 0.12-0.18 wt%, and the balance of ZnO.
0.02 wt% -0.03 wt% of SiO or 0.05 wt% -0.20 wt% of WO in the third step.
The concentration of the PVA solution is 8-9%
Compared with the prior art, the invention has the beneficial effects that:
1. the manganese-zinc ferrite magnetic material and the production process provided by the application can enable the manganese-zinc ferrite magnetic material to have high saturation magnetic flux density, good wide temperature and direct current superposition characteristics under the condition of high magnetic permeability.
Drawings
FIG. 1 is a schematic side view of a manganese-zinc-ferrite magnetic material according to the present invention;
FIG. 2 is a schematic top view of a manganese-zinc-ferrite magnetic material of the present invention;
in the figure: 1. an upper end surface; 2. a lower end face; 3. a central connecting rod; 4. connecting holes; 5. a guide groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1
The invention provides a technical scheme that:
a manganese zinc ferrite magnetic material comprises an upper end face 1, a lower end face 2 and a central connecting rod 3; the utility model discloses a novel connecting structure, including up end 1, connecting hole 4, terminal surface 2, upper end face 1, connecting hole 4 evenly sets up on up end 1, terminal surface 2 is provided with and meets 1 position of up end, size assorted connecting hole 4 down, up-down terminal surface 2 is disc structure, be provided with a plurality of guide ways 5 on the disc circumference of up end 1 and lower terminal surface 2, the number looks adaptation of guide way 5 and connecting hole 4.
The up end 1 and the last guide way 5 of lower terminal surface 2 run through the place terminal surface setting, and each guide way 5 on the up end 1 and each direction on lower terminal surface 2 are the matching setting, and first guide way 5 on the up end 1 and first guide way 5 of lower terminal surface 2 are on same vertical face promptly, and second guide way 5 on the up end 1 and second guide way 5 of lower terminal surface 2 are on same vertical face promptly, analogizes in proper order.
Up end 1 includes upper surface, lower surface and wall, connecting hole 4 sets up on the upper surface, and connecting hole 4 extends one end distance to the lower surface from the upper surface, guide way 5 sets up evenly to set up on annular wall, guide way 5 is the arc structure, the lower surface is connected with central connecting rod 3, and the lower surface passes through with central connecting rod 3 circular arc, and lower terminal surface 2 is similar with 1 structure of up end, just has not been repeated once more.
In another embodiment, the number of the connecting holes 4 is 3, 3 connecting holes 4 are arranged on the upper end surface 1 in a triangular shape, the number of the guide grooves 5 is 3, and each guide groove 5 is arranged on the circumference of the upper end surface 1 between adjacent connecting holes 4.
The central connecting rod 3 is arranged at the central positions of the upper end surface 1 and the lower end surface 2, and the diameter of the central connecting rod 3 is not less than 1/4 of the diameter of the upper end surface 2 and the diameter of the lower end surface 2, so that the manganese-zinc ferrite magnetic material formed by connection is more stable.
The invention also provides a production process of the manganese-zinc ferrite magnetic material, which comprises the following specific steps:
the method comprises the following steps: raw material Fe2O3MnO, ZnO and CaCO3 to obtain a mixture, and Fe2O3MnO and ZnO are as follows by mass percent: fe2O355 wt% -70 wt%, MnO: 30-10 wt%, CaCO 3: 0.12-0.18 wt% of ZnO, and the balance of ZnO;
by increasing Fe in raw material2O3The content of ZnO in the raw materials is reduced, and Fe is reasonably set2O3And ZnO, the Curie temperature and the saturation magnetic flux density can be improved. The CaCO3 is added to ensure that Ca (OH)2 is generated in the subsequent pre-sintering reaction after the raw materials are uniformly mixed, thereby being beneficial to ferrite transformation of the product.
Step two: pressing the mixture into a spherical or cylindrical shape by compression to enable the mixture to have certain strength, and then fully pre-burning the pressed forming block in a track kiln to prepare a primary pre-burning material; the time of the pre-sintering process is 5 hours, and the maximum temperature of the pre-sintering process is 800 ℃.
Step three: adding impurities into the pre-sintering material: 0.02 wt% -0.03 wt% of SiO or 0.05 wt% -0.20 wt% of WO or a combination of the two, and the addition of the impurities for pre-sintering can increase the wide temperature stability of the finally formed manganese zinc ferrite magnetic material.
Step four: adding deionized water into the mixed materials such as the impurity mixed materials, sanding the mixed materials in a ball mill for 60 minutes, pumping the mixed materials into a stirrer, adding 8-9% PVA solution with the concentration of 8wt% of the main component, stirring the mixture for 2 hours, drying the mixture, and pre-sintering the dried powder for 3 hours at the temperature of 700 ℃.
Step five: the particle powder is pressed and formed by a die and a press, the pressed and formed part is gradually pushed into a double-push air kiln to carry out a glue discharging process, the moisture and the polyvinyl alcohol glue of the magnetic ring green body are removed, a push plate in the double-push air kiln is pushed once every 1200 seconds, the highest temperature in the double-push air kiln is controlled at 750 ℃, so that the moisture and the PVA glue of the magnetic ring green body are completely removed, a primary reaction occurs, the product has certain hardness, and the stability of the product can be enhanced.
Step six: and performing surface smoothing treatment on the magnetic ring green compact after rubber discharge in a chamfering rotary machine, wherein the chamfering frequency is 30Hz, so that the surface of the magnetic ring green compact has no edges and corners, and the magnetic conductivity can be improved.
Step seven: the green body was sintered at 1300 ℃ for 3 hours at 3% oxygen partial pressure.
Example 2
The method provides another specific embodiment, and a production process of the manganese-zinc ferrite magnetic material comprises the following specific steps:
the method comprises the following steps: raw material Fe2O3MnO, ZnO and CaCO3 to obtain a mixture, and Fe2O3MnO and ZnO are as follows by mass percent: fe2O355 wt%, MnO: 30 wt%, CaCO 3: 0.12 percent, and the balance of ZnO;
by increasing Fe in raw material2O3The content of ZnO in the raw materials is reduced, and Fe is reasonably set2O3And ZnO, the Curie temperature and the saturation magnetic flux density can be improved. The CaCO3 is added to ensure that Ca (OH)2 is generated in the subsequent pre-sintering reaction after the raw materials are uniformly mixed, thereby being beneficial to ferrite transformation of the product.
Step two: pressing the mixture into a spherical or cylindrical shape by compression to enable the mixture to have certain strength, and then fully pre-burning the pressed forming block in a track kiln to prepare a primary pre-burning material; the time of the pre-sintering process is 5 hours, and the maximum temperature of the pre-sintering process is 800 ℃.
Step three: adding impurities into the pre-sintering material: SiO 0.02 wt% and WO 0.05 wt%, and the addition of impurities for pre-sintering can increase the wide temperature stability of the finally formed manganese-zinc ferrite magnetic material.
Step four: adding deionized water into the mixed materials such as the impurity mixed materials, sanding the mixed materials in a ball mill for 60 minutes, pumping the mixed materials into a stirrer, adding PVA solution with the concentration of 8 percent and the weight of the main component of 8 percent by weight, stirring the mixture for 2 hours, drying the mixture, and pre-sintering the dried powder for 3 hours at the temperature of 700 ℃.
Step five: the particle powder is pressed and formed by a die and a press, the pressed and formed part is gradually pushed into a double-push air kiln to carry out a glue discharging process, the moisture and the polyvinyl alcohol glue of the magnetic ring green body are removed, a push plate in the double-push air kiln is pushed once every 1200 seconds, the highest temperature in the double-push air kiln is controlled at 750 ℃, so that the moisture and the PVA glue of the magnetic ring green body are completely removed, a primary reaction occurs, the product has certain hardness, and the stability of the product can be enhanced.
Step six: and performing surface smoothing treatment on the magnetic ring green compact after rubber discharge in a chamfering rotary machine, wherein the chamfering frequency is 30Hz, so that the surface of the magnetic ring green compact has no edges and corners, and the magnetic conductivity can be improved.
Step seven: and (3) placing the green body at the temperature of 1300 ℃ and sintering for 3 hours under the partial pressure of 3 percent of oxygen to obtain the manganese-zinc ferrite magnetic material in the scheme.
Example 3
The method provides another specific embodiment, and a production process of the manganese-zinc ferrite magnetic material comprises the following specific steps:
the method comprises the following steps: raw material Fe2O3MnO, ZnO and CaCO3 to obtain a mixture, and Fe2O3MnO and ZnO are as follows by mass percent: fe2O370 wt%, MnO: 10 wt%, CaCO 3: 0.18 wt% and the balance ZnO;
by increasing Fe in raw material2O3The content of ZnO in the raw materials is reduced, and Fe is reasonably set2O3And ZnO, the Curie temperature and the saturation magnetic flux density can be improved. The CaCO3 is added to ensure that Ca (OH)2 is generated in the subsequent pre-sintering reaction after the raw materials are uniformly mixed, thereby being beneficial to ferrite transformation of the product.
Step two: pressing the mixture into a spherical or cylindrical shape by compression to enable the mixture to have certain strength, and then fully pre-burning the pressed forming block in a track kiln to prepare a primary pre-burning material; the time of the pre-sintering process is 5 hours, and the maximum temperature of the pre-sintering process is 800 ℃.
Step three: adding impurities into the pre-sintering material: SiO 0.03wt% and WO 0.20 wt%, and the addition of impurities for pre-sintering can increase the wide temperature stability of the finally formed manganese-zinc ferrite magnetic material.
Step four: adding deionized water into the mixed materials such as the impurity mixed materials, sanding the mixed materials in a ball mill for 60 minutes, pumping the mixed materials into a stirrer, adding PVA solution with the concentration of 9 percent and the weight of 8 weight percent of the main component, stirring the mixture for 2 hours, drying the mixture, and pre-sintering the dried powder for 3 hours at the temperature of 700 ℃.
Step five: the particle powder is pressed and formed by a die and a press, the pressed and formed part is gradually pushed into a double-push air kiln to carry out a glue discharging process, the moisture and the polyvinyl alcohol glue of the magnetic ring green body are removed, a push plate in the double-push air kiln is pushed once every 1200 seconds, the highest temperature in the double-push air kiln is controlled at 750 ℃, so that the moisture and the PVA glue of the magnetic ring green body are completely removed, a primary reaction occurs, the product has certain hardness, and the stability of the product can be enhanced.
Step six: and performing surface smoothing treatment on the magnetic ring green compact after rubber discharge in a chamfering rotary machine, wherein the chamfering frequency is 30Hz, so that the surface of the magnetic ring green compact has no edges and corners, and the magnetic conductivity can be improved.
Step seven: the green body was sintered at 1300 ℃ for 3 hours at 3% oxygen partial pressure.
The manganese-zinc-ferrite magnetic material having excellent wide temperature range characteristics can be obtained by all of the 3 examples.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The manganese-zinc ferrite magnetic material is characterized by comprising an upper end face, a lower end face and a central connecting rod; the utility model discloses a fixing device for the connection of a plurality of terminal surfaces, including up end, connecting hole, terminal surface, upper end face, connecting hole, the up end face is provided with a plurality of connecting holes, the connecting hole evenly sets up on the up end face, the terminal surface is provided with down and meets up end position, size assorted connecting hole, the up and down terminal surface is disc structure, be provided with a plurality of guide ways on the disc circumference of up end and terminal surface down, the number of guide way and the number.
2. A manganese zinc ferrite magnetic material as claimed in claim 1, wherein: the guide groove on the upper end face and the guide groove on the lower end face penetrate through the end faces, and each guide groove on the upper end face and each guide groove on the lower end face are arranged in a matched mode.
3. The manganese-zinc-ferrite magnetic material according to claim 1, wherein said upper surface comprises an upper surface, a lower surface and a wall surface, said connecting hole is provided on said upper surface, said connecting hole extends from said upper surface to a distance toward said lower surface, said guiding grooves are provided on said annular wall surface uniformly, said guiding grooves are arc-shaped, said lower surface is connected to said central connecting rod, and said lower surface is arc-transitional to said central connecting rod.
4. A manganese-zinc-ferrite magnetic material in accordance with claim 1, wherein said connection holes are set to 3, 3 connection holes are triangularly arranged on the upper end face, and 3 guide grooves are set, each guide groove being provided on the circumference of the upper end face between adjacent connection holes.
5. A manganese-zinc-ferrite magnetic material in accordance with claim 1, wherein said central connecting rod is provided at the center of the upper and lower end faces, and the diameter of the central connecting rod is not less than 1/4 of the diameters of the upper and lower end faces.
6. A production process of a manganese zinc ferrite magnetic material based on any one of claims 1 to 5, characterized by comprising the following specific steps:
the method comprises the following steps: raw material Fe2O3Mixing MnO, ZnO and CaCO3 to obtain a mixture;
step two: pressing the mixture into a spherical or cylindrical shape by compression to enable the mixture to have certain strength, and then fully pre-burning the pressed forming block in a track kiln to prepare a primary pre-burning material; the time of the pre-sintering process is 5 hours, and the highest temperature of the pre-sintering process is 800 ℃;
step three: adding a certain amount of one or the combination of two of SiO and WO impurities into the pre-sintering material;
step four: adding deionized water into the mixed materials such as the impurity mixed materials, sanding the mixed materials in a ball mill for 60 minutes, pumping the mixed materials into a stirrer, adding PVA solution with the weight of 8wt% of the main component, stirring the mixture for 2 hours, drying the mixture, and pre-sintering the dried powder for 3 hours at the temperature of 700 ℃;
step five: pressing and forming granular powder by using a die and a press, gradually pushing the pressed and formed part into a double-push air kiln, performing a glue discharging process, removing moisture and polyvinyl alcohol glue of the magnetic ring green body, pushing a push plate in the double-push air kiln once every 1200 seconds, and controlling the highest temperature in the double-push air kiln at 750 ℃ so that the moisture and the PVA glue are completely removed from the magnetic ring green body and a primary reaction occurs, wherein the product has certain hardness and can enhance the stability of the product;
step six: performing surface smoothing treatment on the magnetic ring green compact after rubber discharge in a chamfering rotary machine, wherein the chamfering frequency is 30Hz, so that the surface of the magnetic ring green compact has no edges and corners, and the magnetic conductivity can be improved;
step seven: the green body was sintered at 1300 ℃ for 3 hours at 3% oxygen partial pressure.
7. The process for producing a manganese-zinc-ferrite magnetic material according to claim 6, wherein in step one, the Fe2O3MnO and ZnO are as follows by mass percent: fe2O355 wt% -70 wt%, MnO: 30-10 wt%, CaCO 3: 0.12-0.18 wt%, and the balance of ZnO.
8. A process for producing a manganese-zinc-ferrite magnetic material as claimed in claim 6, wherein SiO is 0.02 wt% to 0.03wt% or WO 0.05 wt% to 0.20 wt% in the third step.
9. The production process of the manganese-zinc-ferrite magnetic material based on claim 6, wherein the concentration of the PVA solution is 8-9%.
CN202010151093.3A 2020-03-06 2020-03-06 Manganese-zinc ferrite magnetic material and production process thereof Pending CN111383811A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101913851A (en) * 2010-07-12 2010-12-15 广东风华高新科技股份有限公司 Wide-temperature high-permeability Mn-Zn soft magnetic ferrite material and magnetic core prepared therefrom as well as preparation method thereof
CN204991376U (en) * 2015-06-30 2016-01-20 中山市东晨磁性电子制品有限公司 Novel magnetic core
JP2016131290A (en) * 2015-01-13 2016-07-21 株式会社オートネットワーク技術研究所 Noise filter and holder for noise filter
CN106630994A (en) * 2017-01-10 2017-05-10 湖南艾迪奥电子科技有限公司 Manganese-zinc ferrite magnetic material and preparation method for manganese-zinc ferrite magnetic ring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101913851A (en) * 2010-07-12 2010-12-15 广东风华高新科技股份有限公司 Wide-temperature high-permeability Mn-Zn soft magnetic ferrite material and magnetic core prepared therefrom as well as preparation method thereof
JP2016131290A (en) * 2015-01-13 2016-07-21 株式会社オートネットワーク技術研究所 Noise filter and holder for noise filter
CN204991376U (en) * 2015-06-30 2016-01-20 中山市东晨磁性电子制品有限公司 Novel magnetic core
CN106630994A (en) * 2017-01-10 2017-05-10 湖南艾迪奥电子科技有限公司 Manganese-zinc ferrite magnetic material and preparation method for manganese-zinc ferrite magnetic ring

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