CN103086705B - Mn-Zn soft magnetic ferrite material having wide-temperature high-DC superposition characteristic - Google Patents
Mn-Zn soft magnetic ferrite material having wide-temperature high-DC superposition characteristic Download PDFInfo
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- CN103086705B CN103086705B CN201110344279.1A CN201110344279A CN103086705B CN 103086705 B CN103086705 B CN 103086705B CN 201110344279 A CN201110344279 A CN 201110344279A CN 103086705 B CN103086705 B CN 103086705B
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Abstract
The invention discloses a Mn-Zn soft magnetic ferrite material having a wide-temperature high-DC superposition characteristic. The Mn-Zn soft magnetic ferrite material comprises main ingredients composed of 51.5 to 52.5mol% of Fe2O3, 17.5 to 19mol% of ZnO and 28.5 to 31mol% of Mn3O4, and additives composed of 0.01 to 0.03wt% of CaCO3, 0.1 to 0.2wt% of Co2O3, 0 to 0.0025wt% of SiO2, 0.03 to 0.05wt% of V2O5, 0.02 to 0.05wt% of Nb2O5, and 0.01 to 0.04wt% of CuO, wherein weight percentages of the additives are calculated based on the total weight of the main ingredients. The Mn-Zn soft magnetic ferrite material has the advantages of wide-temperature high-DC superposition characteristic, low ratio loss coefficient and low hysteresis constant.
Description
Technical field
The present invention relates to a kind of Mn-Zn soft magnetic ferrite, specifically, is a kind of Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature and preparation method thereof.
Background technology
Under the leading of technical development and service application, whole world broadband user is developed rapidly, broadband investment strengthens, higher rate, more reliable, cover more extensively, safer high-quality broadband network becomes the most urgent demand in market, structure is centered by broadband network, and the large net that " full-service+all-IP " be direction of take is the ultimate aim of next generation network evolution.The national strategy of broadband China will be reinforced during whole " 12 ", estimates that broadband in 2011 drops into whole nearly 1,000 hundred million yuan.Key-transmission as protecting network reliability improves constantly with the requirement of pulse transformer, and one of its main performance requirements is that Ferrite Material will have the high DC stacked characteristic of wide temperature.Be applied to the pulse transformer of high-speed lan Modem, generally, in 0.1～100MHz broadband range, must reduce insertion loss as far as possible.In low-frequency range, improve magnetic core inductance characteristic, in medium-high frequency section, by reducing number of stitches, reduce coil resistance, namely will improve the DC superposition characteristic of Ferrite Material.And the industrial ferrite of communication class and automotive-type conventionally need to be under 30-35A/m DC bias-field moves in than wide temperature range.In the general lan environment such as office, SOHO, family, must within the scope of 0～70 ℃, obtain the B-H characteristic of sufficient inductance, so the high DC stacked characteristic of ferritic wide temperature is particularly important, the wide temperature characteristics of its incremental permeability especially.Expansion along with communication network, communication equipment Working environment is also increasingly severe, under the environment usually replacing at low temperature and high temperature, move, this just requires the product that exploitation can (40 ℃～+ 100 ℃) be used under wide environmental temperature range more, and product will have satisfactory stability simultaneously.And in order to reduce harmonic distortion in signals transmission, increase transmission range, and reduce error of transmission, also require network pulse transformer to there is low harmonics distortion feature, its major parts magnetic core has very low hysteresis constant.
In sum, along with the development of broadband network and the expansion of communication network, it is high DC stacked that requirement must have wide temperature as the soft magnetic ferrite of network pulse transformer, coefficient of specific loss, low hysteresis constant, along with the miniaturization of network pulse transformer, the development of slimming, need to by reducing number of stitches, reduce coil resistance at high band, will inevitably reduce the inductance of transformer, and the decline of network pulse transformer inductance can have influence on broadband signal transmission, if improve the magnetic permeability of material, although can improve network pulse transformer at the inductance without under bias-field, but in fact, network pulse transformer is to work under certain bias-field, the magnetic permeability of material is higher, under certain bias-field, its incremental permeability drop range is larger, loss simultaneously also can increase, signal distortion increases.Under high and low temperature environment, its contradiction is more outstanding.
Therefore, how to prepare have that wide temperature is high DC stacked, the Mn-Zn soft magnetic ferrite of coefficient of specific loss, low hysteresis constant, solve above-mentioned contradiction, be to need this area scientific and technical personnel difficult problem to be solved badly.
Summary of the invention
Object of the present invention, is to propose to be subject in a kind of wide temperature range the little and little Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of total harmonic distortion of the impact of signal fluctuation.
Another object of the present invention, is to propose to be subject in a kind of wide temperature range the preparation method of the little and Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature that total harmonic distortion is little of the impact of signal fluctuation.
For achieving the above object, technical solution of the present invention is:
A Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature, comprises principal constituent and additive, it is characterized in that:
Described principal constituent mole per distribution ratio is: Fe
2o
351.5～52.5%, ZnO 17.5～19%, Mn
3o
428.5～31%;
Described additive quality per distribution ratio is: CaCO
30.01～0.03wt%, Co
2o
30.1～0.2wt%, SiO
20～0.0025wt%, V
2o
50.03～0.05wt%, Nb
2o
50.02～0.05wt%, CuO 0.01～0.04wt%, the total mass that wherein each mass percent forming of additive is relatively main composition is calculated and is obtained.
The Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present invention can also be further achieved by the following technical measures.
The aforesaid Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature, total add-on of wherein said additive accounts for 0.15～0.3% of main composition total mass.
A kind of preparation method with the Mn-Zn soft magnetic ferrite of the high DC stacked characteristic of wide temperature, concrete operation step comprises batching, mixing, pre-burning, first pulverizing, sand milling, mist projection granulating, adds additive and sintering, the particular content of each step is with identical described in Chinese patent literature CN200510027797.5, and difference is:
(1) in batching step, adopt mixer to be dry mixed 30～60 minutes;
(2) after sand milling step, the particle diameter of slip is controlled at 0.9～1.3 μ m, and centralized particle diameter, and the volume percent of D50 particle diameter is more than or equal to 8%;
(3) in sintering step, temperature rise rate is controlled at 2.5～3.5 ℃/min, at 850～1250 ℃, carries out densification, and oxygen level is lower than 0.5%, and the highest sintering temperature is controlled at 1350～1390 ℃, and rate of temperature fall is controlled at 1.5～3 ℃/min.
Adopt after technique scheme, Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present invention and preparation method thereof has the following advantages:
1, high DC stacked, the coefficient of specific loss of wide temperature, low hysteresis constant characteristic;
2, can be widely used in bridge transformer for FDM, pulse transformer, memory cell input/output pulse transformer, input/output pulse transformer and electron exchange machine pulse transformer for relaying machine for PCM.
Embodiment
By specific embodiment, further illustrate the present invention below.
Reference examples 1
A kind of Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of this reference examples, is comprised of principal constituent and additive, and wherein, the formula of principal constituent is as follows: the Fe of 52.8mol%
2o
3, the ZnO of 17.72mol% is, the Mn of 29.48mol%
3o
4; The formula of additive is as follows: 0.025wt%CaCO
3, 0.1wt%Co
2o
3, 0.002wt%SiO
2, 0.03wt%V
2o
5, 0.02wt%Nb
2o
5, 0.015wt%CuO, each mass percent forming in additive formulations is that the total mass of relatively main composition is calculated and obtains.
The preparation method of the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of this reference examples, concrete operation step has batching, mixing, pre-burning, first pulverizing, sand milling, mist projection granulating, adds additive and sintering, the particular content of each step is with identical described in Chinese patent literature CN200510027797.5, and difference as described in example 1 above.
After testing, the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of this reference examples, in the time of-40 ℃ ,-20 ℃, 30 ℃, 80 ℃, 100 ℃, the incremental permeability under 33A/m DC bias magnetic field condition is 2029,2494,2159,1612,982; 25 ℃, during 10KHz, specific loss coefficient is 3.16 * 10
-6, hysteresis constant η
bbe 0.25 * 10
-6/ mT.
Reference examples 2
A kind of Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of this reference examples, is comprised of principal constituent and additive, and wherein, the formula of principal constituent is as follows: the Fe of 52.5mol%
2o
3, the ZnO of 17.4mol% is, the Mn of 30.1mol%
3o
4; The formula of additive is as follows: 0.025wt%CaCO
3, 0.1wt%Co
2o
3, 0.002wt%SiO
2, 0.03wt%V
2o
5, 0.02wt%Nb
2o
5, 0.015wt%CuO, each mass percent forming in additive formulations is that the total mass of relatively main composition is calculated and obtains.
The preparation method of the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of this reference examples, concrete operation step has batching, mixing, pre-burning, first pulverizing, sand milling, mist projection granulating, adds additive and sintering, the particular content of each step is with identical described in Chinese patent literature CN200510027797.5, and difference as described in example 1 above.
After testing, the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of this reference examples, in the time of-40 ℃ ,-20 ℃, 30 ℃, 80 ℃, 100 ℃, the incremental permeability under 33A/m DC bias magnetic field condition is 2494,2959,2482,1776,1101; 25 ℃, during 10KHz, specific loss coefficient is 2.17 * 10
-6, hysteresis constant η
bbe 0.34 * 10
-6/ mT.
Embodiment 1
A kind of Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, is comprised of principal constituent and additive, and wherein, the formula of principal constituent is as follows: the Fe of 52.2mol%
2o
3, the ZnO of 18.5mol% is, the Mn of 29.3mol%
3o
4; The formula of additive is as follows: 0.025wt%CaCO
3, 0.1wt%Co
2o
3, 0.002wt%SiO
2, 0.03wt%V
2o
5, 0.02wt%Nb
2o
5, 0.015wt%CuO, each mass percent forming in additive formulations is that the total mass of relatively main composition is calculated and obtains.
The preparation method of the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, concrete operation step has batching, mixing, pre-burning, first pulverizing, sand milling, mist projection granulating, adds additive and sintering, the particular content of each step is with identical described in Chinese patent literature CN200510027797.5, and difference is:
(1) batching: adopt mixer to be dry mixed 50 minutes;
(2) after sand milling, the particle diameter of slip is controlled at 1.0 μ m, and centralized particle diameter, and the volume percent of D50 particle diameter is more than or equal to 8%.
(3) sintering: temperature rise rate is controlled at 3.0 ℃/min, carries out densification sintering at 1100 ℃, and oxygen level is lower than 0.5%, and sintering temperature is controlled at 1360 ℃, and rate of temperature fall is controlled at 3 ℃/min.
After testing, the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, in the time of-40 ℃ ,-20 ℃, 30 ℃, 80 ℃, 100 ℃, the incremental permeability under 33A/m DC bias magnetic field condition is 2432,3112,4018,2876,2103; 25 ℃, during 10KHz, specific loss coefficient is 1.41 * 10
-6, hysteresis constant η
bbe 0.11 * 10
-6/ mT.
Embodiment 2
A kind of Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, is comprised of principal constituent and additive, and wherein, the formula of principal constituent is as follows: the Fe of 51.6mol%
2o
3, the ZnO of 18.6mol% is, the Mn of 29.8mol%
3o
4; The formula of additive is as follows: 0.025wt%CaCO
3, 0.1wt%Co
2o
3, 0.03wt%V
2o
5, 0.02wt%Nb
2o
5, 0.015wt%CuO, each mass percent forming in additive formulations is that the total mass of relatively main composition is calculated and obtains.
The preparation method of the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, concrete operation step has batching, mixing, pre-burning, first pulverizing, sand milling, mist projection granulating, adds additive and sintering, the particular content of each step is with identical described in Chinese patent literature CN200510027797.5, and difference as described in example 1 above.
After testing, the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, in the time of-40 ℃ ,-20 ℃, 30 ℃, 80 ℃, 100 ℃, the incremental permeability under 33A/m DC bias magnetic field condition is 2214,3012,3419,2523,2049; 25 ℃, during 10KHz, specific loss coefficient is 1.48 * 10
-6, hysteresis constant η
bbe 0.18 * 10
-6/ mT.
Embodiment 3
A kind of Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, is comprised of principal constituent and additive, and wherein, the formula of principal constituent is as follows: the Fe of 52.4mol%
2o
3, the ZnO of 18.4mol% is, the Mn of 29.2mol%
3o
4; The formula of additive is as follows: 0.025wt%CaCO
3, 0.1wt%Co
2o
3, 0.002wt%SiO
2, 0.03wt%V
2o
5, 0.02wt%Nb
2o
5, 0.015wt%CuO, each mass percent forming in additive formulations is that the total mass of relatively main composition is calculated and obtains.
The preparation method of the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, concrete operation step has batching, mixing, pre-burning, first pulverizing, sand milling, mist projection granulating, adds additive and sintering, the particular content of each step is with identical described in Chinese patent literature CN200510027797.5, and difference as described in example 1 above.
After testing, the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature of the present embodiment, in the time of-40 ℃ ,-20 ℃, 30 ℃, 80 ℃, 100 ℃, the incremental permeability under 33A/m DC bias magnetic field condition is 2375,3241,3976,3012,2219; 25 ℃, during 10KHz, specific loss coefficient is 1.47 * 10
-6, hysteresis constant η
bbe 0.13 * 10
-6/ mT.
By the comparison of above-mentioned comparative example and embodiment, its result clearly illustrates, Mn-Zn soft magnetic ferrite of the present invention, have that wide temperature is high DC stacked, coefficient of specific loss, low hysteresis constant characteristic, that is: the incremental permeability μ under-40～100 ℃ of scopes, 33A/m DC bias magnetic field condition
Δ>=2000; Incremental permeability μ under-20～80 ℃ of scopes, 33A/m DC bias magnetic field condition
Δ>=2500; Specific loss coefficient tan δ/μ i≤1.5 * 10 under 25 ℃, 10KHz, 0.25mT condition
-6, hysteresis constant η
b≤ 0.2 * 10
-6/ mT, can be applicable to bridge transformer for FDM, pulse transformer, memory cell input/output pulse transformer, input/output pulse transformer, electron exchange machine pulse transformer for relaying machine for PCM.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (2)
1. a Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature, comprises principal constituent and additive, it is characterized in that:
Described principal constituent mole per distribution ratio is: Fe
2o
351.5～52.5%, ZnO17.5～19%, Mn
3o
428.5～31%;
Described additive quality per distribution ratio is: CaCO
30.01～0.03wt%, Co
2o
30.1～0.2wt%, SiO
20～0.0025wt%, V
2o
50.03～0.05wt%, Nb
2o
50.02～0.05wt%, CuO0.01～0.04wt%, the total mass that wherein each mass percent forming of additive is relatively main composition is calculated and is obtained;
Wherein: when prepared by described Mn-Zn soft magnetic ferrite:
(1) in batching, adopt mixer to be dry mixed 30～60 minutes;
(2) after sand milling, the particle diameter of slip is controlled at 0.9～1.3 μ m, and centralized particle diameter, and the volume percent of D50 particle diameter is more than or equal to 8%;
(3) in sintering, temperature rise rate is controlled at 2.5～3.5 ℃/min, at 850～1250 ℃, carries out densification, and oxygen level is lower than 0.5%, and the highest sintering temperature is controlled at 1350～1390 ℃, and rate of temperature fall is controlled at 1.5～3 ℃/min.
2. the Mn-Zn soft magnetic ferrite with the high DC stacked characteristic of wide temperature as claimed in claim 1, is characterized in that, total add-on of described additive accounts for 0.15～0.3% of main composition total mass.
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| CN103803964B (en) * | 2013-12-19 | 2016-08-24 | 上海宝钢磁业有限公司 | A kind of Mn-Zn soft magnetic ferrite and preparation method thereof |
| CN108017382B (en) * | 2017-12-04 | 2020-12-11 | 广东佛山金刚磁业有限公司 | MnZn ferrite material and preparation method thereof |
| CN112456994A (en) * | 2020-11-27 | 2021-03-09 | 天通控股股份有限公司 | Low-temperature sintered high-frequency low-loss MnZn soft magnetic ferrite and preparation method thereof |
| CN113480302B (en) * | 2021-09-03 | 2021-11-09 | 天通控股股份有限公司 | Wide-temperature-range high-permeability manganese-zinc soft magnetic ferrite for automotive electronics and preparation method thereof |
| JP7539601B1 (en) | 2023-04-26 | 2024-08-23 | Ｊｆｅケミカル株式会社 | MnZn ferrite |
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| US5711893A (en) * | 1995-05-31 | 1998-01-27 | Samsung Corning Co., Ltd. | Ni-Cu-Zn ferrite |
| CN1651353A (en) * | 2004-12-15 | 2005-08-10 | 横店集团东磁有限公司 | Soft magnetic Mg-Zn ferrite material and low temperature sintering process thereof |
| CN101241791A (en) * | 2007-02-06 | 2008-08-13 | 昆山尼赛拉电子器材有限公司 | Wide-temperature and low-consumption Mn-Zn soft magnetic ferrite and its production method |
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2011
- 2011-11-03 CN CN201110344279.1A patent/CN103086705B/en active Active
Patent Citations (3)
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|---|---|---|---|---|
| US5711893A (en) * | 1995-05-31 | 1998-01-27 | Samsung Corning Co., Ltd. | Ni-Cu-Zn ferrite |
| CN1651353A (en) * | 2004-12-15 | 2005-08-10 | 横店集团东磁有限公司 | Soft magnetic Mg-Zn ferrite material and low temperature sintering process thereof |
| CN101241791A (en) * | 2007-02-06 | 2008-08-13 | 昆山尼赛拉电子器材有限公司 | Wide-temperature and low-consumption Mn-Zn soft magnetic ferrite and its production method |
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