CN101996725A - Soft magnetic mangan zinc ferrite material capable of reducing heat productivity and preparation method thereof - Google Patents
Soft magnetic mangan zinc ferrite material capable of reducing heat productivity and preparation method thereof Download PDFInfo
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- CN101996725A CN101996725A CN2009101947031A CN200910194703A CN101996725A CN 101996725 A CN101996725 A CN 101996725A CN 2009101947031 A CN2009101947031 A CN 2009101947031A CN 200910194703 A CN200910194703 A CN 200910194703A CN 101996725 A CN101996725 A CN 101996725A
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Abstract
The invention relates to a soft magnetic mangan zinc ferrite material capable of reducing heat productivity, which comprises a main material and a trace amount of additive, wherein the main material comprises the following components in percent by mol: 52-55 percent of ferric oxide, 5-11 percent of zinc oxide and the balance of manganese oxide; and the additive is selected from two or more of Nb2O5, SnO2, TiO2 and CaCO3 and has the addition amount accounting 600-3000ppm of the total weight. Compared with the prior art, the invention has the advantages of high saturation magnetic displacement (Bs), low iron loss, working frequency range of 100-300kHz, and the like.
Description
Technical field
The invention belongs to the oxidate magnetic material technical field, especially relate to a kind of soft magnetic MnZn ferrite material KP47 that reduces caloric value and preparation method thereof.
Background technology
In recent years, digital household appliances is universal day by day, and complete machine develops to miniaturization, lightweight direction fast, and especially panel TV framework slimming trend is more remarkable.In this case, the essential miniaturization of power circuit part, slimming.As one of its solution, give full play to had develop a whole set of technology of application project from raw material, develop novel transformer, realized miniaturization, the slimming of power transformer product.And power ferrite is a kind of soft magnetic material that early is used for power transformer, complete electronic set is frivolous to Switching Power Supply in order to adapt to, the requirement of miniaturization, material should develop to the high-frequency low-consumption direction, and device should be to small-sized, light weight, efficient and surface mounting technology development.Simultaneously, along with consumer product develops to digitlization and high-performance, the magnetic material product is had higher requirement, as power circuit, Switching Power Supply, notebook computer adapter and the CCFL LCD back lighting of high definition, digital color TV, panel TV, just power loss, magnetic permeability, the frequency of utilization to soft magnetic ferrite proposed the requirement higher than analog machine.In addition, digital camera-recorder, stereo set, convertible frequency air-conditioner, and the high speed development in field such as domestic computer, office automation product, communication apparatus, for element rush of demands such as Switching Power Supply, transformer, filter, choking-winding, anti-electromagnetic interference, wide band transformer, pulse transformers, these all are the important applied field of high-grade soft magnetic ferrite.This year, international trans-corporation was attracted by the huge market of China, and trying to be the first enters China, and supporting localization requires strongly for components and parts, and this has also brought great demand for China's soft magnetic ferrite industry.Ferrite renowned companies such as present Japanese TDK, FDK, Tokyo ferrite, Kawasaki Steel, Siemens, Dutch Philip begun to produce in enormous quantities the third generations such as PC40, PC44, PC47, four generation high-frequency power ferrite material, its frequency of utilization generally can reach hundreds of KHz-1MHz.For miniaturization and the microminiaturized development trend of complying with electronic device, and the product specification of company brought up to more level, realize large-scale production, enlarge the occupation rate of product in the international market, increase foreign exchange earnings from exports, improve the foundation economic benefit, the requirement of magnetic product is very important to adapt to market.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of possess simultaneously high saturated magnetic induction (Bs), low-loss soft magnetic MnZn ferrite material that reduces caloric value and preparation method thereof for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions: a kind of soft magnetic MnZn ferrite material that reduces caloric value, it is characterized in that, this material comprises major ingredient and micro-additive, described major ingredient comprises component and molar content: iron oxide 52-55%, zinc oxide 5-11%, the manganese oxide surplus; Described micro-additive is selected from Nb
2O
5, SnO
2, TiO
2, Ta
2O
5, CaCO
3In more than 2 kinds or 2 kinds, its addition is the 600-3000ppm of material total weight.
The addition of every kind of micro-additive is 250-800ppm in the described micro-additive.
This method may further comprise the steps:
(1) mix: press the component and the molar content of major ingredient prescription in the raw material, take by weighing iron oxide 52-55%, zinc oxide 5-11%, the manganese oxide surplus adopts the strong machine mixing 1h of mixing to obtain containing the powder of major ingredient;
(2) pre-burning: above-mentioned powder is dropped into the rotary kiln pre-burning, calcined temperature is at 800～950 ℃, the pre-burning time is 40～70 minutes, the mixed powder flow of control is the 4-6 kg/minute, the rotary kiln rotating speed is 5～20 rev/mins, make red mixed powder that solid phase reaction tentatively take place, and make mixed powder be transformed into black mixture by redness;
(3) coarse crushing: the black mixture that above-mentioned pre-burning is obtained adopts vibrator to carry out coarse crushing, and the pulverizing time is 30～60 minutes, makes the powder particle size size distribution even, crosses 200 eye mesh screens with water jetting and sieves;
(4) sand milling: the black powder and the micro-additive that the coarse crushing after above-mentioned the sieving are contained main composition carry out sand milling in sand mill, the whole sand milling time is 40～120 minutes, obtain the black powder that fine powder contains main composition after broken;
(5) slurrying: when sand grinding process finished, the black powder that fine powder is contained main composition after broken stirred in the slurrying bucket its slip is stirred, and drops into glue and defoamer again, and total addition of glue and defoamer is 0.5～1wt% of slip;
(6) spray drying: through the slurry after the slurrying, the control inlet temperature is at 290 ℃～350 ℃, outlet temperature under 80 ℃～100 ℃ by the mist projection granulating tower be sprayed into dry tack free, middle moistening, have good fluidity and dispersed particle, promptly get product.
The particle diameter of the powder described in the step (1) is 1.0-1.5 μ m.
The particle size distribution of the black powder described in the step (4) is controlled between 0.8～1.1 μ m.
Sand milling described in the step (4) adopts waterproof pulverization, utilize pure water as medium, in sand mill, drop into black powder, pure water, dispersant and the micro-additive that coarse crushing contains main composition, dispersant black powder that contains main composition in company with pre-burning when sand milling begins adds, addition is: black powder that contains main composition and pure water total weight in coarse crushing are 100%, black powder 50～the 70wt% that contains main composition of coarse crushing, pure water 30～50wt%; Total weight in the black powder that contains main composition, pure water, dispersant and the micro-additive that drop into the coarse crushing in the sand mill is 100%, described dispersant 0.5～1wt%, micro-additive 0.5～1.0wt%.
Described micro-additive is selected from Nb
2O
5, SnO
2, TiO
2, CaCO
3In more than 2 kinds or 2 kinds.
Glue described in the step (5) is the solution of polyvinyl alcohol.
The present invention adopts unique processing technology routine and atmosphere sintering control technology, by adjusting material prescription and doping, makes the soft magnetic MnZn ferrite material of high saturated magnetic induction (Bs), low-power consumption, and PCV is 250KW/m in the time of its 100 ℃
3, be applicable to the soft magnetic MnZn ferrite materials such as power circuit, Switching Power Supply, notebook computer adapter and CCFL LCD back lighting of panel TV.
Compared with prior art, the present invention has the following advantages:
The first, reduce caloric value: compare with general material, material of the present invention reduces loss 170kW/m approximately
2, only need to change magnetic core and can reduce temperature.To the very strictness of temperature rise regulation, long-term excessively intensification can make the metal generation of solder joints part aging to panel TV, causes performance to be subjected to very big influence with power supply.The measure of this reduction heating can improve reliability of products, can also reduce CO2 emissions.
Second, realize miniaturization: core loss has reduced by 40%, so use magnetic core than traditional magnetic flux density high about 20%, its heating also can be controlled in equal or below, by enlarging the scope of application of magnetic flux density, can dwindle sectional area, for example like this, the weight ratio of EER35 and EER30～EER32 can reduce 40%, reduces the wire rod use amount simultaneously.So both can save resource greatly, can also reduce copper loss simultaneously, in other words just improve power-efficient.
The 3rd, realize slimming: as previously mentioned, can dwindle sectional area, mean under erection space and identical in the past situation, reduce the height of this part, realize the soft magnetic MnZn ferrite material of slimming.
Embodiment
For high saturated magnetic induction of the present invention (Bs), low-loss soft magnetic MnZn ferrite material material and preparation method thereof clearly are described, following specific embodiment is provided, but anything but in order to limit the present invention.
Concrete implementing process flow process is:
Weighing---mixes---pre-burning---fragmentation---sand milling---slurrying---mist projection granulating---compacting---sintering
Embodiment 1:
A kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value, concrete steps are as follows:
(1) mixed: as to press the component and the molar content of major ingredient prescription in the raw material, accurately take by weighing: iron oxide (Fe
2O
3) 52-55%, zinc oxide (ZnO) 5-11%, manganese oxide (MnO) 35-40%, the strong machine that mixes of employing mixes evenly, and total mixed time is 2h, and the powder particle size after mixing is controlled at about 1.0～1.5 μ m.
(2) pre-burning: above-mentioned mixed powder is dropped into the rotary kiln pre-burning, calcined temperature is at 800～950 ℃, the pre-burning time is 40～70 minutes, the mixed powder flow of control is about 5kg/minute, the rotary kiln rotating speed is 5～20 rev/mins, make red mixed powder that solid phase reaction tentatively take place, and make mixed powder be transformed into black by redness.
(3) coarse crushing: the mixed adding vibrator that adopts of black that pre-burning is obtained carries out coarse crushing, and the pulverizing time is 30～60 minutes, makes the powder particle size size distribution even, crosses 200 eye mesh screen percent of pass with water jetting and is controlled at more than 95%;
(4) sand milling: will carry out sand milling through the mixture of coarse crushing, and obtain the black paste of fine powder after broken, the whole sand milling time is 40～120 minutes, and the distribution of general particle diameter is controlled between 0.8～1.1 μ m.
In disintegrator, drop into black powder, pure water, dispersant and the micro-additive of meal, the input ratio is: black powder that contains main composition and pure water total weight in coarse crushing are 100%, black powder 50～the 70wt% that contains main composition of coarse crushing, pure water 30～50wt%; Total weight in the black powder that contains main composition, pure water, dispersant and the micro-additive that drop into the coarse crushing in the sand mill is 100%, described dispersant 0.5～1wt%, micro-additive 0.5～1.0wt%;
Described micro-additive is Nb
2O
5, SnO
2, CaCO
3, its addition is 100% in the soft magnetic MnZn ferrite material total weight, Nb
2O
5: 200ppm, SnO
2: 250ppm, CaCO
3: 500ppm;
(5) slurrying: when sand grinding process finished, stirring more stirred its slip in 1-2 hour in the slurrying bucket, dropped into glue (solution of polyvinyl alcohol) and defoamer again, total addition 0.5～1%wt of glue and defoamer;
(6) spray drying: through the slurry after the slurrying, the control inlet temperature is at 290 ℃～350 ℃, outlet temperature under 80 ℃～110 ℃ by the mist projection granulating tower be sprayed into dry tack free, middle moistening, have good fluidity and a dispersed particle.
(7) compacting: get and spray good particulate material and add a little zinc stearate (particulate material: zinc stearate=1: 3), be pressed into ring blank sintering in the bell jar stove of φ 22 * 14 * 8 that stirs.
Embodiment 2～12:
With step and the preparation method of embodiment 1, select for use the proportioning of different principal components and the addition of micro-additive (specifically as shown in table 1) to prepare sample respectively.
Comparative Examples 13～15:
With step and the preparation method of embodiment 1, select the present invention 1-12 that fills a prescription respectively, conventional high B
SLow-loss prescription 13-15, the addition of concrete principal component proportioning and micro-additive is as shown in table 1, prepares sample respectively.
Table 1: the proportioning and the micro-additive addition of principal component in embodiments of the invention 1～12 and the Comparative Examples 13～15
Be to test saturation induction density (Bs) and power loss value PCV under 25 ℃, 100 ℃ the condition in the test environment temperature
Adopt MATS-2010SP under the 1194A/m magnetic field condition, to test saturation induction density (Bs); Adopt JP2581 power consumption instrument in the 100KHz frequency, measured power loss value PCV (KW/m under the 200mT magnetic field condition
3), adopt the LCZ1601 table to survey Curie temperature, adopt drainage to survey density.Measured value table 2 is as showing:
Table 2: embodiments of the invention 1～12 contrast with the key technical indexes of Comparative Examples 13～15;
Embodiment 16
A kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value, concrete steps are as follows:
(1) mixed: as accurately to take by weighing iron oxide 54% by the raw material proportioning, zinc oxide 11%, manganese oxide 35%, adopt the strong machine that mixes to mix, the mixed time is 2h, powder particle size after mixed is controlled at about 1.0～1.5 μ m, and purpose is to make raw material evenly mixed, when being beneficial to pre-burning at the beginning of single-step solid phase reaction complete.
(2) pre-burning: the powder of above-mentioned mixed main composition is dropped into the rotary kiln pre-burning, calcined temperature is at 800～950 ℃, the pre-burning time is 40～70 minutes, the mixed powder flow of control is about 5 kilograms/minute, the rotary kiln rotating speed is 5～20 rev/mins, make red mixed powder that solid phase reaction tentatively take place, and make mixed powder be transformed into black by redness;
(3) coarse crushing: the black mixture of the main composition that pre-burning is obtained carries out coarse crushing, adopts vibrator, and the pulverizing time is 30～60 minutes, makes the powder particle size size distribution even, crosses 200 eye mesh screen percent of pass with water jetting and is controlled at more than 95%;
(4) sand milling: will carry out sand milling through the mixture of the main composition of coarse crushing, obtain the black powder of the main composition of fine powder after broken, the whole sand milling time is 40～120 minutes, blended stock relies on steel ball and powder particle in sand mill, friction between powder particle and the powder particle, percussion further reduces the average grain diameter of particle, dwindles the distribution of its particle diameter, and the particle size distribution of the black powder of general principal component is controlled between 0.8～1.1 μ m;
Sand milling can adopt a kind of waterproof pulverization, utilizes pure water as medium.In sand mill, drop into black powder, micro-additive, pure water and the dispersant of the main composition of coarse crushing by a certain percentage.Dispersant black powder in company with the main composition of pre-burning when sand milling begins adds, and effect is to prevent that powder from reuniting, and is beneficial to improve sand milling efficient.The input ratio is: black powder that contains main composition and pure water total weight in coarse crushing are 100%, the black powder 60wt% that contains main composition of coarse crushing, pure water 40wt%; Total weight in the black powder that contains main composition, pure water, dispersant and the micro-additive that drop into the coarse crushing in the sand mill is 100%, described dispersant 0.6wt%, micro-additive 0.8wt%.
Described micro-additive is Nb
2O
5, SnO
2, TiO
2, CaCO
3, its addition is 100% in the soft magnetic MnZn ferrite material total weight, Nb
2O
5: 800ppm, SnO
2: 600ppm, TiO
2: 800ppm, CaCO
3: 800ppm;
(5) slurrying: when sand grinding process finishes, stirring in the slurrying bucket more stirred its slip in 1-2 hour, drop into glue (solution of polyvinyl alcohol) and defoamer again, total addition 0.5～1%wt of glue and defoamer, the effect of glue is that it has very strong viscosity, be convenient to the compression moulding of soft ferromagnetic powder, the foam that stirs generation when adding glue is eliminated in acting as of defoamer, prevents that the particle powder is hollow.
(6) spray drying: through the slurry after the slurrying, the control inlet temperature is at 290 ℃～350 ℃, outlet temperature under 80 ℃～100 ℃ by the mist projection granulating tower be sprayed into dry tack free, middle moistening, have good fluidity and a dispersed particle.
Embodiment 17
A kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value is characterized in that, this method may further comprise the steps:
(1) mix: press the component and the molar content of major ingredient prescription in the raw material, take by weighing iron oxide 52%, zinc oxide 11%, manganese oxide 37% adopts sand mill mixing 1h to obtain containing the powder of major ingredient, and the particle diameter of powder is 1.0-1.5 μ m;
(2) pre-burning: above-mentioned particulate material is dropped into the rotary kiln pre-burning, calcined temperature is at 800 ℃, the pre-burning time is 40 minutes, the mixed powder flow of control is 4 kg/minute, the rotary kiln rotating speed is 20 rev/mins, make red blended stock that solid phase reaction tentatively take place, and make blended stock be transformed into black mixture by redness;
(3) coarse crushing: the black mixture that above-mentioned pre-burning is obtained adopts vibrator to carry out coarse crushing, and the pulverizing time is 30 minutes, makes the powder particle size size distribution even, crosses 200 eye mesh screens with water jetting and sieves;
(4) sand milling: the black powder and the micro-additive that the coarse crushing after above-mentioned the sieving are contained main composition carry out sand milling in sand mill, the whole sand milling time is 80 minutes, obtain the black powder that fine powder contains main composition after broken, the particle size distribution of black powder is controlled between 0.8～1.2 μ m;
Described sand milling adopts waterproof pulverization, utilize pure water as medium, in sand mill, drop into black powder, pure water, dispersant and the micro-additive that coarse crushing contains main composition, dispersant black powder that contains main composition in company with pre-burning when sand milling begins adds, addition is: black powder that contains main composition and pure water total weight in coarse crushing are 100%, the black powder 50wt% that contains main composition of coarse crushing, pure water 50wt%; Total weight in the black powder that contains main composition, pure water, dispersant and the micro-additive that drop into the coarse crushing in the sand mill is 100%, described dispersant 1wt%, micro-additive 0.5wt%.
Described micro-additive is Nb
2O
5, TiO
2, its addition is 100% in the soft magnetic MnZn ferrite material total weight, Nb
2O
5: 300ppm, TiO
2: 300ppm;
(5) slurrying: when sand grinding process finishes, the black powder that fine powder is contained main composition after broken stirs in the slurrying bucket its slip is stirred, drop into the solution and the defoamer of polyvinyl alcohol again, total addition of the solution of polyvinyl alcohol and defoamer is the 0.5wt% of slip;
(6) spray drying: through the slurry after the slurrying, the control inlet temperature is at 290 ℃, outlet temperature under 80 ℃ by the mist projection granulating tower be sprayed into dry tack free, middle moistening, have good fluidity and dispersed particle, promptly get product.
Embodiment 18
A kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value is characterized in that, this method may further comprise the steps:
(1) mix: press the component and the molar content of major ingredient prescription in the raw material, take by weighing iron oxide 55%, zinc oxide 5%, manganese oxide 40% adopts sand mill mixing 3h to obtain containing the powder of major ingredient, and the particle diameter of powder is 1.0-1.5 μ m;
(2) pre-burning: above-mentioned particulate material is dropped into the rotary kiln pre-burning, calcined temperature is at 950 ℃, the pre-burning time is 70 minutes, the mixed powder flow of control is 6 kg/minute, the rotary kiln rotating speed is 5 rev/mins, make red blended stock that solid phase reaction tentatively take place, and make blended stock be transformed into black mixture by redness;
(3) coarse crushing: the black mixture that above-mentioned pre-burning is obtained adopts vibrator to carry out coarse crushing, and the pulverizing time is 60 minutes, makes particle size distribution even, crosses 200 eye mesh screens with water jetting and sieves;
(4) sand milling: the black powder and the micro-additive that the coarse crushing after above-mentioned the sieving are contained main composition carry out sand milling in sand mill, the whole sand milling time is 140 minutes, obtain the black powder that fine powder contains main composition after broken, the particle size distribution of black powder is controlled between 0.8～1.2 μ m;
Described sand milling adopts waterproof pulverization, utilize pure water as medium, in sand mill, drop into black powder, pure water, dispersant and the micro-additive that coarse crushing contains main composition, dispersant black powder that contains main composition in company with pre-burning when sand milling begins adds, addition is: black powder that contains main composition and pure water total weight in coarse crushing are 100%, the black powder 70wt% that contains main composition of coarse crushing, pure water 30wt%; Total weight in the black powder that contains main composition, pure water, dispersant and the micro-additive that drop into the coarse crushing in the sand mill is 100%, described dispersant 0.5wt%, micro-additive 1.0wt%.
Described micro-additive is SnO
2, TiO
2, CaCO
3, its addition is 100% in the soft magnetic MnZn ferrite material total weight, SnO
2: 500ppm, TiO
2: 300ppm, CaCO
3: 400ppm;
(5) slurrying: when sand grinding process finishes, the black powder that fine powder is contained main composition after broken stirs in the slurrying bucket its slip is stirred, drop into the solution and the defoamer of polyvinyl alcohol again, total addition of the solution of polyvinyl alcohol and defoamer is the 1wt% of slip;
(6) spray drying: through the slurry after the slurrying, the control inlet temperature is at 350 ℃, outlet temperature under 110 ℃ by the mist projection granulating tower be sprayed into dry tack free, middle moistening, have good fluidity and dispersed particle, promptly get product.
Claims (8)
1. the soft magnetic MnZn ferrite material that can reduce caloric value is characterized in that, this material comprises major ingredient and micro-additive, and described major ingredient comprises component and molar content: iron oxide 52-55%, zinc oxide 5-11%, manganese oxide surplus; Described micro-additive is selected from Nb
2O
5, SnO
2, TiO
2, CaCO
3In more than 2 kinds or 2 kinds, its addition is the 600-3000ppm of material total weight.
2. a kind of soft magnetic MnZn ferrite material that reduces caloric value according to claim 1 is characterized in that the addition of every kind of micro-additive is 250-800ppm in the described micro-additive.
3. preparation method who reduces the soft magnetic MnZn ferrite material of caloric value as claimed in claim 1 is characterized in that this method may further comprise the steps:
(1) mix: press the component and the molar content of major ingredient prescription in the raw material, take by weighing iron oxide 52-55%, zinc oxide 5-11%, the manganese oxide surplus adopts the strong machine mixing 1h of mixing to obtain containing the powder of major ingredient;
(2) pre-burning: above-mentioned powder is dropped into the rotary kiln pre-burning, calcined temperature is at 800～950 ℃, the pre-burning time is 40～70 minutes, the mixed powder flow of control is the 4-6 kg/minute, the rotary kiln rotating speed is 5～20 rev/mins, make red mixed powder that solid phase reaction tentatively take place, and make mixed powder be transformed into black mixture by redness;
(3) coarse crushing: the black mixture that above-mentioned pre-burning is obtained adopts vibrator to carry out coarse crushing, and the pulverizing time is 30～60 minutes, makes the powder particle size size distribution even, crosses 200 eye mesh screens with water jetting and sieves;
(4) sand milling: the black powder and the micro-additive that the coarse crushing after above-mentioned the sieving are contained main composition carry out sand milling in sand mill, the whole sand milling time is 40～120 minutes, obtain the black powder that fine powder contains main composition after broken;
(5) slurrying: when sand grinding process finished, the black powder that fine powder is contained main composition after broken stirred in the slurrying bucket its slip is stirred, and drops into glue and defoamer again, and total addition of glue and defoamer is 0.5～1wt% of slip;
(6) spray drying: through the slurry after the slurrying, the control inlet temperature is at 290 ℃～350 ℃, outlet temperature under 80 ℃～100 ℃ by the mist projection granulating tower be sprayed into dry tack free, middle moistening, have good fluidity and dispersed particle, promptly get product.
4. a kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value according to claim 3 is characterized in that, the particle diameter of the powder described in the step (1) is 1.0-1.5 μ m.
5. a kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value according to claim 3 is characterized in that the particle size distribution of the black powder described in the step (4) is controlled between 0.8～1.1 μ m.
6. a kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value according to claim 3, it is characterized in that, sand milling described in the step (4) adopts waterproof pulverization, utilize pure water as medium, in sand mill, drop into the black powder that coarse crushing contains main composition, pure water, dispersant and micro-additive, dispersant black powder that contains main composition in company with pre-burning when sand milling begins adds, addition is: black powder that contains main composition and pure water total weight in coarse crushing are 100%, black powder 50～the 70wt% that contains main composition of coarse crushing, pure water 30～50wt%; Total weight in the black powder that contains main composition, pure water, dispersant and the micro-additive that drop into the coarse crushing in the sand mill is 100%, described dispersant 0.5～1wt%, micro-additive 0.5～1.0wt%.
7. a kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value according to claim 6 is characterized in that described micro-additive is selected from Nb
2O
5, SnO
2, TiO
2, CaCO
3In more than 2 kinds or 2 kinds.
8. a kind of preparation method who reduces the soft magnetic MnZn ferrite material of caloric value according to claim 3 is characterized in that the glue described in the step (5) is the solution of polyvinyl alcohol.
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|---|---|---|---|
| CN2009101947031A CN101996725A (en) | 2009-08-27 | 2009-08-27 | Soft magnetic mangan zinc ferrite material capable of reducing heat productivity and preparation method thereof |
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|---|---|---|---|
| CN2009101947031A CN101996725A (en) | 2009-08-27 | 2009-08-27 | Soft magnetic mangan zinc ferrite material capable of reducing heat productivity and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674821A (en) * | 2011-12-01 | 2012-09-19 | 上海康顺磁性元件厂有限公司 | Method for preparing Mn-Zn soft magnetic power ferrite core material |
| CN103951408A (en) * | 2014-04-23 | 2014-07-30 | 南通华兴磁性材料有限公司 | Preparation method of manganese zinc ferrite magnetic core material for LED driving power |
| CN109437877A (en) * | 2018-10-23 | 2019-03-08 | 无锡斯贝尔磁性材料有限公司 | A kind of production technology of high solids content manganese-zinc ferrite slurry |
-
2009
- 2009-08-27 CN CN2009101947031A patent/CN101996725A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674821A (en) * | 2011-12-01 | 2012-09-19 | 上海康顺磁性元件厂有限公司 | Method for preparing Mn-Zn soft magnetic power ferrite core material |
| CN103951408A (en) * | 2014-04-23 | 2014-07-30 | 南通华兴磁性材料有限公司 | Preparation method of manganese zinc ferrite magnetic core material for LED driving power |
| CN109437877A (en) * | 2018-10-23 | 2019-03-08 | 无锡斯贝尔磁性材料有限公司 | A kind of production technology of high solids content manganese-zinc ferrite slurry |
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Application publication date: 20110330 |