CN107540362A - A kind of MnZn ferrite material for ups power and preparation method thereof - Google Patents
A kind of MnZn ferrite material for ups power and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to technical field of magnetic materials.The invention discloses a kind of MnZn ferrite material for ups power, it is by Fe2O3, the raw material such as MnO and ZnO is made, while also added CaCO3、ZrO、Nb2O5And Co2O3Deng additive；The invention also discloses a kind of preparation method of the MnZn ferrite material for ups power, and it includes the steps such as pre-burning, addition additive, granulating and forming and sintering.The MnZn ferrite material for ups power in the present invention has the characteristic of the low remanent magnetization of high saturation magnetic flux amount, has the magnetic flux change amount △ B in the larger unit interval, has larger transimission power；At 100 DEG C, Bs ＞ 465mT, Br ＜ 45mT, △ B (Bs Br) >=420mT, test condition 50Hz, 1200A/m；The MnZn ferrite material iron loss of ups power in the present invention is less, can ensure that it has larger efficiency of transmission；At 100 DEG C, Pcv≤600kw/m3, test condition 100kHz, 200mT.
Description
Technical field
The present invention relates to technical field of magnetic materials, more particularly, to a kind of MnZn ferrite material for ups power
And preparation method thereof.
Background technology
Produced according to prediction《The prediction investment strategy planning point of 2014-2018 China uninterrupted power source (UPS) industry market
Analysis report》Display：2012, China's UPS gross sales amounts were about 77.6 hundred million yuan, and ICT industries are influenceed by big data, and 4G is built
Demand and broadband China project stimulation, the demand of China's information equipment ups power is by rapid growth.
Inverter as ups power chief component, it is necessary to tackle lasting load condition, prevent it from satisfying
With ensure the power transmission efficiency of superelevation, it is desirable to which material has big △ B (Bs-Br).The sector considers production cost at present
When with the corresponding relation of efficiency, also resting on PC40 materials mostly, and using the making of PC40 materials, it is necessary to which volume is done
It is very big, just can guarantee that resistance to high current, the DMR91 of eastern magnetic due to of a relatively high △ B, showing up prominently in the sector,
It is limited for UPS volume-diminished but it is still limited in △ B lifting.In order to realize the miniaturization of ups power, it is badly in need of
Develop a material with higher △ B.
With developing rapidly and MEMS (Micro for the high frequency of electronic device, high speed and integrated circuit technique
Electronical Mechanical System) technology progress, the overall power density of electronic component increase substantially and
Physical size is less and less, it is ensured that identical power transmission density, when reducing magnetic device size, then must increase transmission
Frequency or transmission quantity, and ups power is mainly electrically connected with city, frequency is certain, when the size of its transimission power depends on unit
Interior magnetic flux change amount △ B, so developing high △ B material just turns into current necessary work.
Material of the country with high △ B not yet reports that domestic enterprise is primarily upon high Bs characteristics at present, and to remanent magnetism Br
Attention rate it is relatively low.Therefore, the most important thing that the low Br materials of high Bs are works at present is developed.
The content of the invention
To solve the above problems, the invention provides one kind to have the low remanent magnetization of high saturation magnetic flux amount, can improve
The MnZn ferrite material for ups power of device overall power transmission density；
Present invention also offers a kind of preparation method of the MnZn ferrite material for ups power.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of MnZn ferrite material for ups power, include the raw material of following molar percentage：
Fe2O33.8~4.5mol% of 53.1~56.4mol%, MnO 39.1~43.1mol%, ZnO.
Preferably, the MnZn ferrite material for ups power also contains following additive：
CaCO3600~1000ppm, ZrO 100~250ppm, Nb2O5100~250ppm, Co2O3800~1100ppm.
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；
B) additive is added：Add additives in preburning powdered material, mix 100~150 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1000~1100 DEG C；
d2：Then 1300~1330 DEG C are warming up to, and is incubated 4~8 hours；
d3：Then 1000~1100 DEG C are cooled to；
d4：Continue to be cooled to 850~950 DEG C；
d5：Finally it is cooled to room temperature.
Preferably, in step a, calcined temperature is 700~850 DEG C, and burn-in time is 2~4 hours, excessively 20 after crushing~
40 mesh sieves.
The concentration that 7wt%~10wt% is added preferably, in step c, during granulation is 10wt% PVA solution, and adopts
With spray drying.
Preferably, in the d1 stages, heating rate is more than 0 DEG C/min and is less than or equal to 3.5 DEG C/min, and atmosphere is air
Atmosphere.
Preferably, in the d2 stages, heating rate is 4~8 DEG C/min, and oxygen concentration control is in 5~7.5vol% during insulation.
Preferably, in the d3 stages, rate of temperature fall is more than 0 DEG C/min and is less than 1.2 DEG C/min, and oxygen concentration passes through public affairs
Formula lg (P (O2))=a-14540/T is controlled, a is 10.0~14.0.
In the d3 stages, it is that lg (P (O2))=a-14540/T gradually reduces partial pressure of oxygen according to partial pressure of oxygen equation of equilibrium, wherein T is
Absolute temperature during sintering, a is the constant determined according to ferrite fraction formula, wherein be related to the determination of a values, " opening has
Just, Huang Yongjie, Luo Di people magnetic material [M] Chengdu：Publishing house of Chendu Telecommunication Engineering College, 1988. ", " the refined .MnZn of Deng Shang
Ferrite sintering process studies [J] magnetic materials and device, 1996 (cx):50-53. " and " Huang Aiping, Tan Fuqing, beans Xiao Ming
Influence [J] magnetic material and device of the sintering atmosphere to manganese-zinc power ferrite material property, 2014 (4):41-44. " etc. book
The discussion of a values is directed in nationality and document, those of ordinary skill in the art can obtain a values by the study to above-mentioned bibliography
Determination method and a values determination value, the present invention in a values scope be 10.0~14.0.
Preferably, in the d4 stages, rate of temperature fall is more than 0 DEG C/min and is less than or equal to 2.5 DEG C/min, aoxidizes concentration control
System is in 0.015~0.025vol%.
Preferably, in the d5 stages, rate of temperature fall is more than 0 DEG C/min and is less than 5 DEG C/min, and oxygen concentration control exists
0vol%.
Therefore, the invention has the advantages that：
(1) MnZn ferrite material for ups power in the present invention has the low remanent magnetization of high saturation magnetic flux amount
Characteristic, there is the magnetic flux change amount △ B in the larger unit interval, there is larger transimission power；At 100 DEG C, Bs ＞
465mT, Br ＜ 45mT, △ B (Bs-Br) >=420mT, test condition 50Hz, 1200A/m；
(2) the MnZn ferrite material iron loss of the ups power in the present invention is less, can ensure that it has larger transmission effect
Rate；At 100 DEG C, Pcv≤600kw/m3, test condition 100kHz, 200mT.
Embodiment
Technical scheme is further described with reference to embodiment.
Obviously, described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, all other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of protection of the invention.
In the present invention, if not refering in particular to, all equipment and raw material are commercially available or the industry is conventional,
Method in following embodiments, it is this area conventional method unless otherwise instructed.
Embodiment
The content of raw material and additive is as shown in table 1 in embodiment 1~9：
Table 1：The raw material of embodiment 1~9, additive level table
MnZn ferrite material preparation method in each embodiment for ups power is as follows：
Embodiment 1
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；The concentration that 8wt% is added during granulation is 10wt% PVA solution, and
Using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1310 DEG C are warming up to, and is incubated 6 hours；Heating rate is 5 DEG C/min, during insulation oxygen concentration control exist
7.0vol%；
d3：Then 1100 DEG C are cooled to；Rate of temperature fall is 1.0 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Embodiment 2~3
It is used for the preparation method of the MnZn ferrite material of ups power in embodiment 2~3 with embodiment 1.
Embodiment 4
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；The concentration that 8wt% is added during granulation is 10wt% PVA solution, and
Using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1300 DEG C are warming up to, and is incubated 6 hours；Heating rate is 6 DEG C/min, during insulation oxygen concentration control exist
7.0vol%；
d3：Then 1100 DEG C are cooled to；Rate of temperature fall is 1.0 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Embodiment 5
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；The concentration that 8wt% is added during granulation is 10wt% PVA solution, and
Using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1310 DEG C are warming up to, and is incubated 6 hours；Heating rate is 5 DEG C/min, during insulation oxygen concentration control exist
6.0vol%；
d3：Then 1100 DEG C are cooled to；Rate of temperature fall is 0.8 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Embodiment 6
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 700 DEG C,
Burn-in time is 2 hours, and 20 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 100 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；The concentration that 7wt% is added during granulation is 10wt% PVA solution, and
Using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1000 DEG C；Heating rate is 1.0 DEG C/min, and atmosphere is air gas
Atmosphere；
d2：Then 1300 DEG C are warming up to, and is incubated 4 hours；Heating rate is 4 DEG C/min, during insulation oxygen concentration control exist
5.0vol%；
d3：Then 1000 DEG C are cooled to；Rate of temperature fall is 1.0 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 10.0；
d4：Continue to be cooled to 850 DEG C；Rate of temperature fall is 1.0 DEG C/min, and oxidation concentration control is in 0.015vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is to be controlled more than 1.0 DEG C/min, oxygen concentration in 0vol%.
Embodiment 7
It is used for the preparation method of the MnZn ferrite material of ups power in embodiment 7 with embodiment 6.
Embodiment 8
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 850 DEG C,
Burn-in time is 4 hours, and 40 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 150 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；The concentration that 10wt% is added during granulation is 10wt% PVA solution,
And using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1100 DEG C；Heating rate is 3.5 DEG C/min, and atmosphere is air gas
Atmosphere；
d2：Then 1330 DEG C are warming up to, and is incubated 8 hours；Heating rate is 8 DEG C/min, during insulation oxygen concentration control exist
7.5vol%；
d3：Then 1100 DEG C are cooled to；Rate of temperature fall is 1.19 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 14.0；
d4：Continue to be cooled to 950 DEG C；Rate of temperature fall is 2.5 DEG C/min, and oxidation concentration control is in 0.025vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 4.95 DEG C/min, and oxygen concentration is controlled in 0vol%.
Embodiment 9
It is used for the preparation method of the MnZn ferrite material of ups power in embodiment 9 with embodiment 8.
Comparative example
By following technical parameter, 9 groups of comparative examples are set.
The content of raw material and additive is as shown in table 2 in comparative example 1~9：
Table 2：The raw material of comparative example 1~9, additive level table
Preparation method is as follows in each comparative example：
Comparative example 1
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；2wt% PVA solution is added during granulation, and using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1310 DEG C are warming up to, and is incubated 6 hours；Heating rate is 5 DEG C/min, during insulation oxygen concentration control exist
7.0vol%；
d3：Then 1100 DEG C are cooled to；Rate of temperature fall is 1.0 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Comparative example 2~6
It is used for the preparation method of the MnZn ferrite material of ups power in comparative example 2~6 with comparative example 1.
Comparative example 7
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；2wt% PVA solution is added during granulation, and using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1300 DEG C are warming up to, and is incubated 6 hours；Heating rate is 3.33 DEG C/min, during insulation oxygen concentration control exist
7.0vol%；
d3：Then 1000 DEG C are cooled to；Rate of temperature fall is 1.0 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Comparative example 8
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；2wt% PVA solution is added during granulation, and using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1300 DEG C are warming up to, and is incubated 6 hours；Heating rate is 8.5 DEG C/min, during insulation oxygen concentration control exist
7.0vol%；
d3：Then 1000 DEG C are cooled to；Rate of temperature fall is 1.0 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Comparative example 9
A kind of preparation method of MnZn ferrite material for ups power, comprises the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；Calcined temperature is 800 DEG C,
Burn-in time is 3 hours, and 30 mesh sieves are crossed after crushing；
B) additive is added：Add additives in preburning powdered material, mix 140 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；2wt% PVA solution is added during granulation, and using spray drying；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1050 DEG C；Heating rate is 2 DEG C/min, and atmosphere is air atmosphere；
d2：Then 1300 DEG C are warming up to, and is incubated 6 hours；Heating rate is 6 DEG C/min, during insulation oxygen concentration control exist
7.0vol%；
d3：Then 1000 DEG C are cooled to；Rate of temperature fall is 1.25 DEG C/min, and oxygen concentration passes through formula lg (P (O2))=a-
14540/T is controlled, a 12.0；
d4：Continue to be cooled to 900 DEG C；Rate of temperature fall is 2.0 DEG C/min, and oxidation concentration control is in 0.02vol%；
d5：Finally it is cooled to room temperature；Rate of temperature fall is 3.0 DEG C/min, and oxygen concentration is controlled in 0vol%.
Performance test：
It will be tested by the MnZn ferrite material that above-described embodiment 1~9 and comparative example 1~9 are prepared with SY-8258 types B-H
Instrument is in 50Hz, 1194A/m, the Bs and Br of 100 DEG C of test, the power consumption of 100 DEG C of test under 100kHz, 200mT.
Test result：Test result is shown in Table 3；
3 each embodiment of table and comparative example MnZn ferrite material the performance test results
It should be appreciated that to those skilled in the art, can according to the above description be improved or converted, and
All these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of MnZn ferrite material for ups power, it is characterised in that include the raw material of following molar percentage：
Fe2O33.8~4.5mol% of 53.1~56.4mol%, MnO 39.1~43.1mol%, ZnO.
2. a kind of MnZn ferrite material for ups power according to claim 1, it is characterised in that also containing following
The additive of content：
CaCO3600~1000ppm, ZrO 100~250ppm, Nb2O5100~250ppm, Co2O3800~1100ppm.
A kind of 3. preparation method of the MnZn ferrite material according to claim 2 for ups power, it is characterised in that
Comprise the following steps：
A) pre-burning：Pre-burning and grinding and sieving are carried out after above-mentioned raw materials are mixed, preburning powdered material is made；
B) additive is added：Add additives in preburning powdered material, mix 100~150 minutes, obtain powder；
C) granulating and forming：It is granulated and is molded obtained formed body；
D) sinter：Sintering is divided into 5 stages, is designated as d1~d5 successively；
d1：Formed body is put into stove, from room temperature to 1000~1100 DEG C；
d2：Then 1300~1330 DEG C are warming up to, and is incubated 4~8 hours；
d3：Then 1000~1100 DEG C are cooled to；
d4：Continue to be cooled to 850~950 DEG C；
d5：Finally it is cooled to room temperature.
4. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the step a, calcined temperature is 700~850 DEG C, and burn-in time is 2~4 hours, and 20~40 mesh sieves are crossed after crushing.
5. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the step c, the concentration that 7wt%~10wt% is added during granulation is 10wt% PVA solution, and using spray drying.
6. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the d1 stages, heating rate is more than 0 DEG C/min and is less than or equal to 3.5 DEG C/min, and atmosphere is air atmosphere.
7. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the d2 stages, heating rate is 4~8 DEG C/min, and oxygen concentration control is in 5~7.5vol% during insulation.
8. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the d3 stages, rate of temperature fall is more than 0 DEG C/min and is less than 1.2 DEG C/min, and oxygen concentration passes through formula lg (P
(O2))=a-14540/T is controlled, a is 10.0~14.0.
9. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the d4 stages, rate of temperature fall is more than 0 DEG C/min and is less than or equal to 2.5 DEG C/min, and oxidation concentration control is 0.015
~0.025vol%.
10. a kind of preparation method of MnZn ferrite material for ups power according to claim 3, its feature exist
In：In the d5 stages, rate of temperature fall is more than 0 DEG C/min and is less than 5 DEG C/min, and oxygen concentration is controlled in 0vol%.
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Cited By (2)
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|---|---|---|---|---|
| CN108911733A (en) * | 2018-07-10 | 2018-11-30 | 横店集团东磁股份有限公司 | A kind of high Bs high frequency MnZn Ferrite Material of low-power consumption and preparation method thereof |
| CN115536380A (en) * | 2022-10-24 | 2022-12-30 | 安徽龙磁金属科技有限公司 | Manganese zinc ferrite material with high saturation magnetic flux density and low loss for forward transformer |
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| CN115536380A (en) * | 2022-10-24 | 2022-12-30 | 安徽龙磁金属科技有限公司 | Manganese zinc ferrite material with high saturation magnetic flux density and low loss for forward transformer |
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