CN105110785A - High-frequency low-loss MnZn ferrite, and preparation method thereof - Google Patents

High-frequency low-loss MnZn ferrite, and preparation method thereof Download PDF

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Publication number
CN105110785A
CN105110785A CN201510604990.4A CN201510604990A CN105110785A CN 105110785 A CN105110785 A CN 105110785A CN 201510604990 A CN201510604990 A CN 201510604990A CN 105110785 A CN105110785 A CN 105110785A
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mnzn ferrite
preparation
power consumption
frequency low
loss mnzn
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唐靖岚
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Wuxi Qingyang Machinery Manufacturing Co Ltd
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Wuxi Qingyang Machinery Manufacturing Co Ltd
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Abstract

The invention provides a high-frequency low-loss MnZn ferrite. The high-frequency low-loss MnZn ferrite comprises main materials of 30-40mol% of Fe2O3, 36-42mol% of MnO, 10-15mol% of TiO2, the balance of ZnO, as well as auxiliary materials of 0.25-0.35mol% of CaCO3, 0.04-0.6mol% of V2O5 and 0.02-0.03mol% of Nb2O5. Meanwhile, the invention provides a preparation method for the high-frequency and low-loss MnZn ferrite. The preparation method comprises the steps of preparation of a pre-sintering material, preparation of a particle material, and low-temperature sintering. The high-frequency low-loss MnZn ferrite provided by the invention can be used at a high frequency condition safely and steady, and has a very low power; the preparation method for the MnZn ferrite has the advantages of energy conservation and environmental protection.

Description

A kind of high-frequency low-loss MnZn ferrite and preparation method thereof
Technical field
The present invention relates to a kind of magneticsubstance, particularly, relate to a kind of high-frequency low-loss MnZn ferrite, comprise its preparation method.
Background technology
MnZn FERRITE CORE is widely used in the basic industry of the national economy such as science and techniques of defence, communication, computer, radar, broadcast television, medical treatment and surveying instrument, abstract the recreational consumption electronic product, industry and office automation, automotive electronics, illumination.Most MnZn power ferrite material of current China only can work in below 1MHz, and several ferrites that can work in this frequency few in number, but have very large power consumption, if the MnZn power ferrite power consumption of prior art production is all at 300mW/cm 3above (1MHz30mT100 DEG C), greatly constrain the development of China's switch power supply to high frequency direction, along with lifting and the new product development of switch power technology, in the urgent need to can 1 ~ 3MHz be worked in and the very low MnZn Ferrite Material of power loss.
In addition, in prior art, the ferritic sintering temperature of MnZn is generally at 1300-1400 DEG C, consume energy high, pollute large, live incompatible with current low-carbon (LC).
Patent CN102503396A discloses a kind of high-frequency low-loss MnZn ferrite, comprises major ingredient: Fe 2o 3: 50.2 ~ 54mol%, MnO:36 ~ 42mol%, ZnO: surplus; Auxiliary material: CaCO 3: 0.25 ~ 0.35wt%, V 2o 5: 0.04 ~ 0.6wt%, Nb 2o 5: 0.02 ~ 0.03wt%.Meanwhile, which also discloses the preparation method of high-frequency low-loss MnZn ferrite, comprise the preparation of Preburning material, the preparation of particulate material and low-temperature sintering.Although high-frequency low-loss MnZn ferrite disclosed in this patent is at 100 DEG C, power consumption≤200mW/cm3 under 1MHz, 30mT; 100 DEG C, power consumption is≤320mW/cm3 under 3MHz, 10mT, but its power consumption also has the possibility reduced further.
Summary of the invention
In order to reduce the power consumption of high-frequency low-loss MnZn ferrite under 100 DEG C of 1MHz30mT conditions and under 100 DEG C of 3MHz10mT conditions further; the invention provides and a kind ofly can work in 1 ~ 3MHz and there is the MnZn ferrite of suitable low-power consumption; in addition; the present invention proposes a kind of low temperature sintering technology, for saving the energy and environment protection significant.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
First aspect, the invention provides a kind of high-frequency low-loss MnZn ferrite, comprises major ingredient and the auxiliary material of following composition:
Major ingredient: Fe 2o 3: 30 ~ 40mol%;
MnO：36～42mol％；
TiO 2：10～15mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.25 ~ 0.35mol%;
V 2O 5：0.04～0.6mol％；
Nb 2O 5：0.02～0.03mol％。
Wherein, Fe 2o 3content can be 30mol%, 32mol%, 34mol%, 36mol%, 38mol% or 40mol%; The content of MnO can be 36mol%, 38mol%, 40mol% or 42mol% etc.; TiO 2content can be 10mol%, 11mol%, 12mol%, 13mol%, 14mol% or 15mol% etc.; CaCO 3content can be 0.25mol%, 0.27mol%, 0.30mol%, 0.33mol% or 0.35mol% etc.; V 2o 5content can be 0.04mol%, 0.1mol%, 0.2mol%, 0.3mol%, 0.4mol%, 0.5mol% or 0.6mol% etc.; Nb 2o 5content can be 0.02mol%, 0.022mol%, 0.024mol%, 0.026mol%, 0.028mol% or 0.03mol% etc.
In major ingredient, TiO is with the addition of in the present invention 2, itself and MnO and Fe 2o 3synergy, promotes grain growing, thus reduces the power consumption of MnZn ferrite under 100 DEG C of 1MHz30mT conditions and under 100 DEG C of 3MHz10mT conditions; If TiO 2less than 10mol%, then there is the tendency that crystal particle diameter misgrowth and unfavorable condition that magnetic loss is increased occur; If TiO 2more than 15mol%, then there is the tendency that the unfavorable condition that initial permeability μ i reduces occurs.
Preferably, its auxiliary material also comprises the composition of following weight percent: CuO:0 ~ 0.03mol%, and such as 0,0.01mol%, 0.02mol% or 0.03mol% etc.
Preferably, major ingredient and the auxiliary material of following composition is comprised:
Major ingredient: Fe 2o 3: 33 ~ 37mol%;
MnO：39～40mol％；
TiO 2：13～14mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.25 ~ 0.35mol%;
V 2O 5：0.2～0.4mol％；
Nb 2O 5：0.02～0.03mol％；
CuO：0～0.01mol％。
Second aspect, the present invention proposes the preparation method of above-mentioned high-frequency low-loss MnZn ferrite, comprises the following steps:
(1) preparation of Preburning material;
(2) preparation of particulate material;
(3) with press, particulate material is compressed to green compact, 450 DEG C are risen to 0.5 ~ 1 DEG C/min, 900 DEG C are risen to again with 1 ~ 3 DEG C/min, 1100 DEG C are risen to again with 0.5 ~ 1 DEG C/min, finally rise to 1180 ~ 1250 DEG C with 1 ~ 3 DEG C/min, under the oxygen partial pressure of 3 ~ 6%, heat preservation sintering 3 ~ 5 hours, obtains required magnetic core.
Wherein, step (1) Preburning material be prepared as prior art, specific as follows:
Take Fe 2o 3, MnO, ZnO and TiO 2four kinds of major ingredients add in sand mill, add the deionized water of 50wt% simultaneously, sand milling 20 ~ 30 minutes; After sand milling in suction stirrer, the concentration adding ingredients by weight 10wt% is polyvinyl alcohol (PVA) solution of 8 ~ 9%, stirs 2 hours, carries out spraying dry; By the pre-burning 1 ~ 2 hour at the temperature of 700-900 DEG C of dried red powder, obtain Preburning material.
The preparation of step (2) particulate material is also prior art, specific as follows:
Taking Preburning material adds in sand mill, adds the deionized water of auxiliary material and 50wt% according to weight ratio, sand milling 1 ~ 1.5 hour; Be evacuated to stirrer after sand milling, and the concentration adding ingredients by weight 10wt% is 8 ~ 9%PVA solution, stirs 2 hours, carry out secondary mist projection granulating, obtain particulate material.
High-frequency low-loss MnZn ferrite proposed by the invention has following beneficial effect:
High-frequency low-loss MnZn ferrite proposed by the invention is used for the working conditions of 1-3MHz, safety and stability, fills up the domestic MnZn ferrite be not almost applicable to completely under this operating frequency blank.The present invention by adding TiO in major ingredient 2, itself and MnO and Fe 2o 3synergy, promotes grain growing, thus reduces the power consumption of MnZn ferrite under 100 DEG C of 1MHz30mT conditions and under 100 DEG C of 3MHz10mT conditions; It is at 100 DEG C, power consumption≤100mW/cm under 1MHz, 30mT 3; At 100 DEG C, power consumption≤200mW/cm under 3MHz, 10mT 3, well below common ferrite.
Embodiment
Technical scheme of the present invention is further illustrated below by embodiment.
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1
High-frequency low-loss MnZn ferrite, comprises major ingredient and the auxiliary material of following composition:
Major ingredient: Fe 2o 3: 35mol%;
MnO：40mol％；
TiO 2：13mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.3wt%;
V 2O 5：0.4wt％；
Nb 2O 5：0.025wt％。
The preparation method of high-frequency low-loss MnZn ferrite, comprises the following steps:
(1) preparation of Preburning material;
(2) preparation of particulate material;
(3) low-temperature sintering: particulate material is compressed to green compact with press, rises to 450 DEG C with 0.5 DEG C/min, then rises to 900 DEG C with 3 DEG C/min, 1100 DEG C are risen to again with 0.5 DEG C/min, finally rise to 1180 DEG C with 1 DEG C/min, under the oxygen partial pressure of 6%, heat preservation sintering 5 hours, obtains required magnetic core.
The high-frequency low-loss MnZn ferrite power consumption obtained by above composition of raw materials and preparation method is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 85mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 165mW/cm 3.
Embodiment 2
High-frequency low-loss MnZn ferrite, comprises major ingredient and the auxiliary material of following composition:
Major ingredient: Fe 2o 3: 33mol%;
MnO：39mol％；
TiO 2：13.5mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.35wt%;
V 2O 5：0.04wt％；
Nb 2O 5：0.02wt％。
CuO：0.01wt％。
The preparation method of high-frequency low-loss MnZn ferrite, comprises the following steps:
(1) preparation of Preburning material;
(2) preparation of particulate material;
(3) low-temperature sintering: particulate material is compressed to green compact with press, rises to 450 DEG C with 1 DEG C/min, then rises to 900 DEG C with 1 DEG C/min, 1100 DEG C are risen to again with 1 DEG C/min, finally rise to 1250 DEG C with 3 DEG C/min, under the oxygen partial pressure of 3%, heat preservation sintering 3 hours, obtains required magnetic core.
The high-frequency low-loss MnZn ferrite power consumption performance obtained by above composition of raw materials and preparation method is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 90mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 180mW/cm 3.
Embodiment 3
High-frequency low-loss MnZn ferrite, comprises major ingredient and the auxiliary material of following composition:
Major ingredient: Fe 2o 3: 37mol%;
MnO：39.5mol％；
TiO 2：14mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.25wt%;
V 2O 5：0.6wt％；
Nb 2O 5：0.03wt％；
TiO 2：0.3wt％；
CuO：0.03wt％。
The preparation method of high-frequency low-loss MnZn ferrite, comprises the following steps:
(1) preparation of Preburning material;
(2) preparation of particulate material;
(3) low-temperature sintering: particulate material is compressed to green compact with press, rises to 450 DEG C with 1 DEG C/min, then rises to 900 DEG C with 2 DEG C/min, 1100 DEG C are risen to again with 1 DEG C/min, finally rise to 1225 DEG C with 2 DEG C/min, under the oxygen partial pressure of 5%, heat preservation sintering 4 hours, obtains required magnetic core.The high-frequency low-loss MnZn ferrite power consumption performance obtained by above composition of raw materials and preparation method is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 70mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 150mW/cm 3.
Embodiment 4
Major ingredient except high-frequency low-loss MnZn ferrite comprises except following component, and other steps are identical with the even embodiment of material therefor 1.
Major ingredient: Fe 2o 3: 30mol%;
MnO：36mol％；
TiO 2：10mol％；
ZnO: surplus;
The high-frequency low-loss MnZn ferrite power consumption performance obtained by above composition of raw materials and preparation method is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 100mW/cm 3; Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 200mW/cm 3.
Embodiment 5:
Major ingredient except high-frequency low-loss MnZn ferrite comprises except following component, and other steps are identical with the even embodiment of material therefor 1.
Major ingredient: Fe 2o 3: 40mol%;
MnO：42mol％；
TiO 2：15mol％；
ZnO: surplus;
The high-frequency low-loss MnZn ferrite power consumption performance obtained by above composition of raw materials and preparation method is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 95mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 190mW/cm 3.
Comparative example 1:
Embodiment 1 in patent CN102503396A, the MnZn ferrite power consumption performance prepared is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 200mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 329mW/cm 3.
Comparative example 2:
Except not adding Fe 2o 3outward, other steps are all in the same manner as in Example 1, and the MnZn ferrite power consumption performance prepared is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 210mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 310mW/cm 3.
Comparative example 3:
Except TiO 2addition be 20mol%, other steps are all in the same manner as in Example 1, and the MnZn ferrite power consumption performance prepared is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 192mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 283mW/cm 3.
Comparative example 4:
Except TiO 2addition be 1mol%, other steps are all in the same manner as in Example 1, and the MnZn ferrite power consumption performance prepared is as follows:
Working conditions is 100 DEG C, 1MHz, 30mT time:
Power consumption of the present invention: 189mW/cm 3;
Working conditions is 100 DEG C, 3MHz, 10mT time:
Power consumption of the present invention: 273mW/cm 3.
The result of integrated embodiment 1-5 and comparative example 1-4 can be found out, the present invention by adding TiO in major ingredient 2, itself and MnO and Fe 2o 3synergy, promotes grain growing, thus reduces the power consumption of MnZn ferrite under 100 DEG C of 1MHz30mT conditions and under 100 DEG C of 3MHz10mT conditions; It is at 100 DEG C, power consumption≤100mW/cm under 1MHz, 30mT 3; At 100 DEG C, power consumption≤200mW/cm under 3MHz, 10mT 3, well below common ferrite.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. a high-frequency low-loss MnZn ferrite, comprises major ingredient and the auxiliary material of following composition:
Major ingredient: Fe 2o 3: 30 ~ 40mol%;
MnO：36～42mol％；
TiO 2：10～15mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.25 ~ 0.35mol%;
V 2O 5：0.04～0.6mol％；
Nb 2O 5：0.02～0.03mol％。
2. high-frequency low-loss MnZn ferrite according to claim 1, its auxiliary material also comprises the composition of following weight percent:
CuO：0～0.03mol％。
3. high-frequency low-loss MnZn ferrite according to claim 1 and 2, comprises major ingredient and the auxiliary material of following composition:
Major ingredient: Fe 2o 3: 33 ~ 37mol%;
MnO：39～40mol％；
TiO 2：13～14mol％；
ZnO: surplus;
Auxiliary material: CaCO 3: 0.25 ~ 0.35mol%;
V 2O 5：0.2～0.4mol％；
Nb 2O 5：0.02～0.03mol％；
CuO：0～0.01mol％。
4. the high-frequency low-loss MnZn ferrite according to any one of claim 1-3, its 100 DEG C, power consumption≤100mW/cm under 1MHz, 30mT 3; Its 100 DEG C, power consumption≤200mW/cm under 3MHz, 10mT 3.
5. the high-frequency low-loss MnZn ferrite according to any one of claim 1-4, its 100 DEG C, power consumption is 70 ~ 90mW/cm under 1MHz, 30mT 3; Its 100 DEG C, power consumption is 150 ~ 180mW/cm under 3MHz, 10mT 3.
6. the preparation method of the high-frequency low-loss MnZn ferrite described in any one of claim 1-5, comprises the following steps:
(1) preparation of Preburning material;
(2) preparation of particulate material;
(3) low-temperature sintering: particulate material is compressed to green compact with press, 450 DEG C are risen to 0.5 ~ 1 DEG C/min, 900 DEG C are risen to again with 1 ~ 3 DEG C/min, 1100 DEG C are risen to again with 0.5 ~ 1 DEG C/min, finally rise to 1180 ~ 1250 DEG C with 1 ~ 3 DEG C/min, under the oxygen partial pressure of 3 ~ 6%, heat preservation sintering 3 ~ 5 hours, obtains required magnetic core.
CN201510604990.4A 2015-09-21 2015-09-21 High-frequency low-loss MnZn ferrite, and preparation method thereof Pending CN105110785A (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN109354489A (en) * 2018-11-12 2019-02-19 横店集团东磁股份有限公司 A kind of high-frequency low-consumption Ferrite Material and preparation method thereof
CN109384463A (en) * 2018-12-30 2019-02-26 常熟浩博电子科技有限公司 High frequency high energy efficiency converts MnZn ferrite and preparation method thereof
CN110304913A (en) * 2019-07-04 2019-10-08 湖北文理学院 A kind of high frequency ultra-low loss Mn-Zn soft magnetic ferrite and preparation method thereof
CN112979301A (en) * 2021-02-25 2021-06-18 电子科技大学 High-frequency high-temperature low-loss MnZn power ferrite material and preparation method thereof

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CN102161585A (en) * 2011-01-20 2011-08-24 绵阳开磁科技有限公司 High-frequency wide-temperature low-power-consumption soft magnetic Mn-Zn ferrite and preparation method thereof
CN102503396A (en) * 2011-11-28 2012-06-20 无锡斯贝尔磁性材料有限公司 High-frequency low-loss MnZn ferrite and preparation method thereof
CN104628371A (en) * 2014-12-31 2015-05-20 横店集团东磁股份有限公司 Manganese zinc soft magnetic ferrite material and preparation method thereof

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CN102161585A (en) * 2011-01-20 2011-08-24 绵阳开磁科技有限公司 High-frequency wide-temperature low-power-consumption soft magnetic Mn-Zn ferrite and preparation method thereof
CN102503396A (en) * 2011-11-28 2012-06-20 无锡斯贝尔磁性材料有限公司 High-frequency low-loss MnZn ferrite and preparation method thereof
CN104628371A (en) * 2014-12-31 2015-05-20 横店集团东磁股份有限公司 Manganese zinc soft magnetic ferrite material and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109354489A (en) * 2018-11-12 2019-02-19 横店集团东磁股份有限公司 A kind of high-frequency low-consumption Ferrite Material and preparation method thereof
CN109354489B (en) * 2018-11-12 2021-02-26 横店集团东磁股份有限公司 High-frequency low-loss ferrite material and preparation method thereof
CN109384463A (en) * 2018-12-30 2019-02-26 常熟浩博电子科技有限公司 High frequency high energy efficiency converts MnZn ferrite and preparation method thereof
CN110304913A (en) * 2019-07-04 2019-10-08 湖北文理学院 A kind of high frequency ultra-low loss Mn-Zn soft magnetic ferrite and preparation method thereof
CN110304913B (en) * 2019-07-04 2021-11-26 湖北文理学院 High-frequency ultralow-loss manganese-zinc soft magnetic ferrite material and preparation method thereof
CN112979301A (en) * 2021-02-25 2021-06-18 电子科技大学 High-frequency high-temperature low-loss MnZn power ferrite material and preparation method thereof
CN112979301B (en) * 2021-02-25 2022-06-28 电子科技大学 High-frequency high-temperature low-loss MnZn power ferrite material and preparation method thereof

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Application publication date: 20151202