CN1627454A - Soft-magnetic manganese-zinc ferrite in low wastage - Google Patents
Soft-magnetic manganese-zinc ferrite in low wastage Download PDFInfo
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- CN1627454A CN1627454A CN 200310109415 CN200310109415A CN1627454A CN 1627454 A CN1627454 A CN 1627454A CN 200310109415 CN200310109415 CN 200310109415 CN 200310109415 A CN200310109415 A CN 200310109415A CN 1627454 A CN1627454 A CN 1627454A
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- zinc ferrite
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Abstract
Major converted components of soft-magnetic manganese-zinc ferrite in low wastage are as follows: 52.7-53.6 mol% Fe2O3, 8.5-11.8 mol% ZnO and MnO as the rest. At least one of following component: 1000-8000ppm SnO2, 500-2000ppm CaCO3, 300-1500ppm V2O5 is added into the major components. After major components and additive are mixed and preburning, second adulteration is carried out in pulverizing operation. Admixing additive includes at least two kinds of materials from Nb2O5, K2O, CaCO3, Ta2O5, SnO2, and V2O5. Total add on is between 800-1200ppm. Features of the disclosed ferrite are higher operation frequency, low loss, and higher saturation flux density.
Description
Technical field
The present invention relates to the high performance soft magnetic ferrite that a kind of MnZn series soft magnetic ferrite, particularly operating frequency are higher, magnetic loss is low, magnetic flux density is higher, belong to the oxidate magnetic material technical field.
Background technology
Development along with the communication technology, electronic device is tending towards miniaturization, lightness and operating frequency high frequency, the driving frequency of power transformer is by rising to 100～500KHZ scope about 25KHZ, this performance to soft magnetism MnZn power ferrite magnetic core is had higher requirement, require the power ferrite high-frequency low-consumption, loss requires at 300mW/cm under the 100KHZ/200mT
3About, require simultaneously material to have higher saturation flux density.
In the prior art, application number is to propose the manganese-zinc ferrite of a kind of main composition prescription through optimizing in 02138280.8 the patent application, and its main composition is the Fe of 52～55mol%
2O
3, 53～54mol% preferably; The ZnO of 7～12mol%, preferably 8～11mol%; The MnO of 36～38mol%, the preferably MnO of 36～37mol%; And adopt the nano-scale oxide material as the additive composition.Although the manganese-zinc ferrite core of this invention has the premium properties of high frequency, high saturation magnetic flux density and low magnetic loss, but because it adopts nano-scale oxide as additive, its production cost is higher, and nanometer materials extremely are difficult for Uniform Dispersion (nano material is easily reunited) in process of production.
Summary of the invention
The object of the present invention is to provide a kind of operating frequency higher, loss P
CvLower, saturation flux density Bs is higher, and lower-cost soft magnetism MnZn ferrite.
To achieve the above object of the invention, the technical solution used in the present invention is:
Main composition is the iron oxide (Fe that is scaled 52.7～53.6 moles of (mol) %
2O
3), the zinc oxide (ZnO) of 8.5～11.8 moles of (mol) %, all the other are manganese oxide (MnO); In main composition, add the SnO of 1000～8000ppm
2,, the CaCO of 500～2000ppm
3, 300～1500ppm V
2O
5In at least a.
Fe in the above-mentioned soft magnetism MnZn ferrite formulations
2O
3Also can be optimized for 52.8～53.5mol%, ZnO can be optimized for 9.2～11.0mol%;
Above-mentioned additive in main composition also can be optimized for the SnO of 1000～5000ppm
2, 500～1200ppm CaCO
3, 300～800ppm V
2O
5In at least a, total addition is between 1000～5000ppm.
In order further to reduce the loss of material, improve saturation flux density, after main composition and additive mixing pre-burning, carry out again secondary doping, the additive that mixes is Nb
2O
5, K
2O, CaCO
3, Ta
2O
5, SnO
2, V
2O
5In at least two kinds, total addition is between 800～1200ppm.
The beneficial effect that the present invention compared with prior art has:
Owing to adopt common oxide as additive, reduced production cost, be conducive to batch production;
Because of MnZn ferrite material material formula is optimized, be controlled at 9.2～11.0mol% as the mol ratio of zinc oxide, make magnetic core of transformer be operated in 80 ℃～120 ℃ and have lower loss;
Nb
2O
5, K
2O, CaCO
3, Ta
2O
5, SnO
2, V
2The adding of the oxides such as O has changed the microstructure of material, has reduced the size of crystal grain, has improved resistivity;
Owing to adopt the secondary doping technology, make soft magnetism MnZn FERRITE CORE have higher saturation flux density and lower loss;
Mix high valence elements and can make Fe
2+Amount increases, and lowest loss point moves to low-temperature space, and mixing at a low price, element can make Fe
2+Amount reduces, and lowest loss point moves to the high-temperature region, and therefore, the present invention can regulate the power consumption minimum temperature easily by the selection of blast blending.
Soft magnetism MnZn Ferrite Material of the present invention is applicable to making all kinds of switching mode power supply transformer magnetic cores, in 10KHZ～500KHZ operating frequency range, has lower loss and than high saturation magnetic flux density.
Description of drawings
Shown in Figure 1 is that the present invention adds the additive of element at a low price and high valence elements additive the impact of lowest loss point is contrasted in same main composition.
Shown in Figure 2 is the present invention under same main composition prescription, adopts secondary doping and the contrast of adopting loss in doping techniques situation.
Shown in Figure 3 is Nb
2O
5Addition to the situation that affects of Ferrite Material loss of the present invention (100 ℃ time).
Shown in Figure 4 be φ 31 * 19 * 6 sample rings made of Ferrite Material of the present invention at 100KHZ, 200mT is the result of test down.
25 ℃ to 120 ℃ the saturation flux density Bs that φ 31 * 19 * 6 sample rings that are Ferrite Material of the present invention is made shown in Figure 5 are tested under 1194m/A.
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment
As Fig. 1, the Fe that the main composition prescription of MnZn Ferrite Material is 53.2mol%
2O
3, the MnO of 35.8mol%, the ZnO of 11mol%, at main composition oxide CaCO at a middle or low price
3Mixing (1000ppm) makes the loss minimum point temperature move to the high temperature direction, high oxide SnO
2Mixing (1000ppm) makes the loss minimum point temperature move to the low temperature direction, illustrated that also mixing of low oxide can make Fe simultaneously
2+Reduce, mixing of high oxide can make Fe
2+Increase.
Such as Fig. 2, main composition prescription is Fe
2O
3--53.0mol%, MnO--37.0mol%, ZnO--10.0mol%.What lower curve represented is to adopt the secondary doping technology, namely at principal component Fe
2O
3, when MnO, a sand milling of ZnO, mix SnO
23000ppm.And at drying-granulating by 950 ℃ of pre-burnings, when the secondary sand milling is in small, broken bits, add again the Nb of 300ppm after the pre-burning
2O
5, 500ppm CaCO
3V with 300ppm
2O
5A doping techniques is adopted in top curve representative, i.e. blast blending not when principal component sand milling, pre-burning, only in principal component after sand milling, pre-burning, when the secondary sand milling is in small, broken bits, add again the Nb of 300ppm
2O
5, 500ppm CaCO
3V with 300ppm
2O
5Blast blending can make additive evenly distribute on intragranular, crystal boundary in main composition, and solid solution has obvious effects to the resistivity that improves material, so the eddy current loss of material is improved significantly in the spar lattice.As can be seen from Figure 2, the ferrite loss is starkly lower than the situation of once mixing under the secondary doping situation.
Curve shown in Figure 3 has shown in 100 ℃ of situations Nb
2O
5Addition what to the impact of loss.Main composition prescription is Fe
2O
3--53.2mol%, MnO--36.7.0mol%, ZnO--11.0mol%, mix the SnO of 3000ppm in main composition
2, mix the CaCO of 500ppm when the powder fine powder is broken after pre-burning
3, 300ppm V
2O
5Nb with variable
2O
5, Nb
2O
5Addition between 0～500ppm.As can be seen from Figure, Nb
2O
5Addition is less than the 300ppm stage, its addition be worn to inverse ratio, i.e. the more many losses of addition are more low; Work as Nb
2O
5When addition surpasses 300ppm, its addition be worn to direct ratio, namely become on the contrary big along with addition increases loss.Nb
2O
5Addition when 200～350ppm scope, the ferrite loss is littler, substantially at 350mW/cm
3Below.
Shown in Figure 4, main composition prescription is Fe
2O
3--53.0mol%, MnO--37.0mol%, ZnO--10.0mol%, mix the SnO of 3000ppm in main composition
2, through material wet-mixing 30 minutes, by the spray dryer granulation, calcined temperature was 950 ℃, adopted the pre-burning of rotary kiln through type; Rewetting method fine powder is broken after elder generation's dry method coarse crushing, carries out secondary doping when fine powder is broken, adds the Nb of 300ppm
2O
5, 500ppm CaCO
3V with 300ppm
2O
5, the average grain diameter behind the wet pulverizing is 1.0 microns; Adopt spray dryer to make the particle of about 80-200 micron.Before particle is used for moulding, earlier with particle disposal, make water content be controlled at 0.3%-0.5%, flow angle is less than 30 degree.The sample ring of making φ 31 * 19 * 6 is incubated 3 hours down at 1280 ℃, and oxygen content is 3% during insulation.The loss result that the sample ring is tested under 100KHZ/200mT is represented that by Fig. 4 curve as can be seen from Figure 4, this material has lower loss 60 ℃～120 ℃ scope, is 300mW/cm in the time of 80 ℃
3, be 370mW/cm 120 ℃ times
3, the minimum point of loss is at 100 ℃, lowest loss＜250mW/cm
3
Curve shown in Figure 5 is the result of 25 ℃ to 120 ℃ saturation flux density Bs data representation testing under 1194m/A of φ 31 * 19 * 6 sample rings that make under the prescription of above-mentioned Fig. 4 and the technology.As seen from Figure 5, this material has higher saturation flux density, in the time of 25 ℃, and Bs＞530mT; In the time of 100 ℃, Bs＞420mT.
Claims (7)
1, soft-magnetic manganese-zinc ferrite in low wastage is characterized in that, main composition is the Fe that is scaled 52.7～53.6mol%
2O
3, the ZnO of 8.5～11.8mol%, all the other are MnO; In main composition, add the SnO of 1000～8000ppm
2, 500～2000ppm CaCO
3, 300～1500ppm V
2O
5In at least a.
2, soft-magnetic manganese-zinc ferrite in low wastage as claimed in claim 1 is characterized in that, described main composition Fe
2O
3Content be 52.8～53.5mol%, the content of ZnO is 9.2～11.0mol%.
3, soft-magnetic manganese-zinc ferrite in low wastage as claimed in claim 1 or 2 is characterized in that, the additive in the described main composition is the SnO of 1000～5000ppm
2, 500～1200ppm CaCO
3, 300～800ppm V
2O
5In at least a, total addition is between 1000～5000ppm.
4, soft-magnetic manganese-zinc ferrite in low wastage as claimed in claim 1 or 2 is characterized in that, after described main composition and additive mixing pre-burning, carries out secondary doping again, and the oxide that mixes is Nb
2O
5, TiO
2, ZrO
2, CaCO
3, Ta
2O
5, SnO
2, V
2O
5In at least two kinds, total addition is between 800～1200ppm.
5, soft-magnetic manganese-zinc ferrite in low wastage as claimed in claim 3 is characterized in that, after described main composition and additive mixing pre-burning, carries out secondary doping again, and the oxide that mixes is Nb
2O
5, TiO
2, ZrO
2, CaCO
3, Ta
2O
5, SnO
2, V
2O
5In at least two kinds, total addition is between 800～1200ppm.
6, soft-magnetic manganese-zinc ferrite in low wastage as claimed in claim 4 is characterized in that, the oxide that mixes in the described secondary doping comprises Nb
2O
5, its addition is between 200～350ppm.
7, soft-magnetic manganese-zinc ferrite in low wastage as claimed in claim 5 is characterized in that, the oxide that mixes in the described secondary doping comprises Nb
2O
5, its addition is between 200～350ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310109415 CN1627454A (en) | 2003-12-12 | 2003-12-12 | Soft-magnetic manganese-zinc ferrite in low wastage |
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|---|---|---|---|
| CN 200310109415 CN1627454A (en) | 2003-12-12 | 2003-12-12 | Soft-magnetic manganese-zinc ferrite in low wastage |
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ID=34758957
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|---|---|---|---|
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400462C (en) * | 2005-08-11 | 2008-07-09 | 横店集团东磁有限公司 | Mn-Zn ferrite material |
| CN101236829B (en) * | 2007-12-07 | 2011-09-28 | 广东风华高新科技股份有限公司 | A making method for magnetic core of Mn-Zn soft magnetic ferrite |
| CN101593596B (en) * | 2008-03-25 | 2012-01-18 | Tdk株式会社 | Ferrite sintered body and manufacturing method therefor |
| CN102881397A (en) * | 2012-09-27 | 2013-01-16 | 无锡宏昌五金制造有限公司 | Zinc-manganese alloy material |
| CN103351159A (en) * | 2013-06-26 | 2013-10-16 | 天长市中德电子有限公司 | ZP3KD soft magnetic ferrite material and production method thereof |
| CN103396111A (en) * | 2013-08-12 | 2013-11-20 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | High-frequency wide-temperature low-loss manganese-zinc ferrite and manufacturing technique thereof |
| CN105645945A (en) * | 2016-01-07 | 2016-06-08 | 天通控股股份有限公司 | High-frequency manganese-zinc ferrite material |
| CN109678486A (en) * | 2019-02-26 | 2019-04-26 | 南通华兴磁性材料有限公司 | A kind of wide warm low-temperature coefficient low-consumption Mn-Zn ferrite material |
| CN110128130A (en) * | 2019-05-06 | 2019-08-16 | 南京中电熊猫磁电科技有限公司 | Mn-Zn soft magnetic ferrite and its manufacturing process with high resistance saturated characteristic |
| CN114195500A (en) * | 2022-02-18 | 2022-03-18 | 天通控股股份有限公司 | Wide-temperature high-frequency high-magnetic-flux-density manganese-zinc soft magnetic ferrite for charging pile and preparation method thereof |
-
2003
- 2003-12-12 CN CN 200310109415 patent/CN1627454A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400462C (en) * | 2005-08-11 | 2008-07-09 | 横店集团东磁有限公司 | Mn-Zn ferrite material |
| CN101236829B (en) * | 2007-12-07 | 2011-09-28 | 广东风华高新科技股份有限公司 | A making method for magnetic core of Mn-Zn soft magnetic ferrite |
| CN101593596B (en) * | 2008-03-25 | 2012-01-18 | Tdk株式会社 | Ferrite sintered body and manufacturing method therefor |
| CN102881397A (en) * | 2012-09-27 | 2013-01-16 | 无锡宏昌五金制造有限公司 | Zinc-manganese alloy material |
| CN103351159A (en) * | 2013-06-26 | 2013-10-16 | 天长市中德电子有限公司 | ZP3KD soft magnetic ferrite material and production method thereof |
| CN103351159B (en) * | 2013-06-26 | 2016-02-03 | 天长市中德电子有限公司 | A kind of ZP3KD soft magnetic ferrite and production method thereof |
| CN103396111B (en) * | 2013-08-12 | 2016-01-13 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | A kind of high frequency wide-temperature and low-consumption Mn-Zn ferrite and manufacturing process thereof |
| CN103396111A (en) * | 2013-08-12 | 2013-11-20 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | High-frequency wide-temperature low-loss manganese-zinc ferrite and manufacturing technique thereof |
| CN105645945A (en) * | 2016-01-07 | 2016-06-08 | 天通控股股份有限公司 | High-frequency manganese-zinc ferrite material |
| CN109678486A (en) * | 2019-02-26 | 2019-04-26 | 南通华兴磁性材料有限公司 | A kind of wide warm low-temperature coefficient low-consumption Mn-Zn ferrite material |
| CN110128130A (en) * | 2019-05-06 | 2019-08-16 | 南京中电熊猫磁电科技有限公司 | Mn-Zn soft magnetic ferrite and its manufacturing process with high resistance saturated characteristic |
| CN114195500A (en) * | 2022-02-18 | 2022-03-18 | 天通控股股份有限公司 | Wide-temperature high-frequency high-magnetic-flux-density manganese-zinc soft magnetic ferrite for charging pile and preparation method thereof |
| CN114195500B (en) * | 2022-02-18 | 2022-07-12 | 天通控股股份有限公司 | Wide-temperature high-frequency high-magnetic-flux-density manganese-zinc soft magnetic ferrite for charging pile and preparation method thereof |
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