CN102167572A - Nickel zinc ferrite material with initial permeability of 10+/-20 percent and preparation method thereof - Google Patents
Nickel zinc ferrite material with initial permeability of 10+/-20 percent and preparation method thereof Download PDFInfo
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- CN102167572A CN102167572A CN2010106034060A CN201010603406A CN102167572A CN 102167572 A CN102167572 A CN 102167572A CN 2010106034060 A CN2010106034060 A CN 2010106034060A CN 201010603406 A CN201010603406 A CN 201010603406A CN 102167572 A CN102167572 A CN 102167572A
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Abstract
The invention discloses a nickel zinc ferrite material with the initial permeability of 10+/-20 percent. A main phase of the material is a spinel structure, and the material comprises Fe2O3, ZnO, NiO and CoO; and the material is characterized by comprising the following components based on oxides: 46.5 to 49 mol percent of Fe2O3, 0.2 to 4.5 mol percent of ZnO, 44 to 49 mol percent of NiO and 0.3 to 2.5 mol percent of CoO. The nickel zinc ferrite material with the initial permeability of 10+/-20 percent has high frequency, low electromagnetic loss and high saturation magnetic flux density under large working current, can be used for manufacturing choking coils in a power generator of a high frequency electroless lamp. The material has extremely low electromagnetic loss at the working frequency of 2.65MHz of the high frequency electroless lamp, has the quality Q of more than 260 at the frequency of 2.65MHz, and has the power consumption of below 800kw/m<3> under the testing conditions of 1MHz and 10mT.
Description
Technical field
The present invention relates to a kind of nickel-zinc-ferrite material production technology that is used for making high-frequency non-polar lamp power producer reactance coil, particularly a kind of initial permeability is nickel-zinc-ferrite material of 10 ± 20% and preparation method thereof.
Background technology
HF lamp without electrodes (High Frequency Electronic Discharge Lamp) is the novel light source of high-tech that integrates up-to-date electronics power-saving technique and electric light source technology, it is without filament, adopt magnetic field to come energizing gas discharge, luminous, have plurality of advantages such as energy-efficient, environmental protection, long lifetime.HF lamp without electrodes is by producer, and power coupler and bulb three parts are formed, and driving source produces the above electricity of 2.65MHz electric current frequently, and it delivers to power coupler through feeder line.When high-frequency current passes through power coupler, produce a higher frequency electromagnetic field.The magnetic field that changes promptly produces an electric field perpendicular to changes of magnetic field, and bulb internal discharge spatial electronics is quickened by electric field, when energy reaches certain value, bumps with gas molecule in the container, and the gas avalanche ionization forms plasma body in the bulb.When the plasma body excited atom is returned ground state, spontaneous ejaculation UV-light, it excites the phosphor powder on the bulb walls to send visible light.
The technological development of HF lamp without electrodes and application are attracting the scientific and technological development personnel and the entrepreneur of the industry of electric light illumination both at home and abroad always.This is because HF lamp without electrodes has many unique distinctions, it integrates long-lived, energy-conservation and environmental protection, as a kind of novel green electric light source, its its net effect of comparing with the traditional electrical light source is far superior to the electric light source of other types, its technology and industry are in the fast-developing stage of growth at present, the same with led light source, HF lamp without electrodes is a kind of sunrise industry.
For guaranteeing the works better of electrodeless lamp, need provide the electric current of a frequency stabilization as the producer of power supply, and realize this point then depending primarily on a core devices---the reactance coil in the producer.Reactance coil mainly plays current limliting and adjusts the effect of power work frequency in producer, because reactance coil is operated under the big electric current of high frequency, for guaranteeing the steady operation of reactance coil, particularly reduce the heating of reactance coil in the work engineering, this just requires the FERRITE CORE in the reactance coil to have high frequency lower electromagnetic loss and high saturation magnetic flux density under big working current.Magnetic permeability can not be too high in addition, and general requirement is below 15, otherwise very difficult matching circuit.
What be used for the reactance coil magnetic core in the market is mainly the ferrocart core material, such material characteristics is exactly that saturation magnetic flux density is big, under big electric current, be difficult for saturated, but its resistivity is very low, be difficult to be applied in the high frequency field, particularly under the 2.65MHz of HF lamp without electrodes frequency, magnetic core is easy to produce bigger eddy-current loss, thereby cause heating serious, can't works better.
Therefore, releasing a kind of initial permeability is 10 ± 20%, has higher electric resistivity, the novel nickel zincium soft magnetic ferrite material that under the big electric current of high frequency, has utmost point lower electromagnetic loss and big saturation magnetic flux density, can guarantee reactance coil steady operation in the HF lamp without electrodes producer, and reducing its thermal value, this prolongs product life and has very important effect for the job stability that improves HF lamp without electrodes.
Summary of the invention
The purpose of this invention is to provide and a kind ofly have high frequency lower electromagnetic loss and high saturation magnetic flux density under big working current, the initial permeability that can be used for making high-frequency non-polar lamp power producer reactance coil is nickel-zinc-ferrite material of 10 ± 20% and preparation method thereof.
In order to achieve the above object, initial permeability provided by the invention is 10 ± 20% nickel-zinc-ferrite material, and its principal phase is a spinel structure, forms to comprise Fe
2O
3, ZnO, NiO and CoO, it is characterized in that it forms content and be calculated as with oxide compound:
Fe
2O
3Be 46.5mol%～49mol%;
ZnO is 0.2mol%～4.5mol%;
NiO is 44mol%～49mol%;
CoO is 0.3～2.5mol%.
In process of production, it can also include the nanometer V that silane coupling agent has carried out surface modification that passes through as the sintering fusing assistant of the 0.2wt%～0.5wt% that accounts for gross weight
2O
5
Initial permeability provided by the invention is the preparation method of 10 ± 20% nickel-zinc-ferrite material, and its step is as follows:
1) ball milling:
With the Fe that weighs up
2O
3, ZnO, NiO and CoO starting material put into sand mill, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, the ball milling time is 1 hour～2 hours;
2) pre-burning:
With a good starting material oven dry of ball milling, to put into electric furnace and carry out pre-burning, calcined temperature is 1000 ℃～1150 ℃, the pre-burning time is 1.5 hours～3.5 hours, furnace cooling after the pre-burning;
3) impurity adds:
Starting material gross weight 0.2wt%～0.5wt% is added in gradation, and selects the nanometer V that has carried out surface modification through silane coupling agent for use
2O
5As the sintering fusing assistant;
4) secondary ball milling:
Pre-imitation frosted glass is put into sand mill, add deionized water, the weight of deionized water is 0.9 times of starting material gross weight, impurity is divided into five equal portions and carries out the gradation interpolation, add pitch time is 10 minutes at every turn, total ball milling time is 2 hours～4 hours, requires powder average particle size behind the ball milling between 1.00 μ m～1.60 μ m;
5) forming and sintering:
The pre-imitation frosted glass oven dry that secondary ball milling is good, the polyvinyl alcohol that adds the 9wt%～14wt% of starting material gross weight, uniform mixing, the granulation of sieving, compression moulding, put into the box-type furnace sintering, sintering process takes two sections to impact sintering process, and at first sintering temperature is elevated within 1250 ℃～1350 ℃, be incubated 0.5 hour～1 hour, then sintering temperature is controlled within 1150 ℃～1250 ℃, soaking time is 1 hour～3 hours, and furnace cooling gets final product to room temperature.
Initial permeability provided by the invention is 10 ± 20% nickel-zinc-ferrite material, has high frequency lower electromagnetic loss and high saturation magnetic flux density under big working current, can be used for making the nickel-zinc-ferrite material of high-frequency non-polar lamp power producer reactance coil.This material has extremely low electromagnetic consumable under HF lamp without electrodes 2.65MHz operating frequency, its quality factor Q is more than 260 when the 2.65MHz frequency; At 1MHz, under the 10mT test condition, power consumption is at 800kw/m
3Below, and this material also has high saturation magnetic flux density, and under the 16kA/m test condition, Bs is greater than 180mT.So good electromagnetic consumable characteristic can effectively ensure the works fine state of the reactance coil in the HF lamp without electrodes producer, reduces its thermal value, prolongs product life, therefore has good market outlook.In addition; initial permeability provided by the invention is 10 ± 20%; under big working current, have high frequency lower electromagnetic loss and high saturation magnetic flux density; the preparation method of nickel-zinc-ferrite material that can be used for making high-frequency non-polar lamp power producer reactance coil is owing to have the pre-burning and the sintering range of broad; and need not atmosphere protection, make process repeatability and consistency of product all fine.In the preparation method, pass through the nanometer V that silane coupling agent has carried out surface modification owing to having adopted
2O
5As the sintering fusing assistant, this will cause reducing of sintering fusing assistant usage quantity, help to improve the electromagnetic consumable characteristic of nickel-zinc ferrite.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment:
The initial permeability that present embodiment provides is 10 ± 20% nickel-zinc-ferrite material, and its principal phase is a spinel structure, forms to comprise Fe
2O
3, ZnO, NiO and CoO, it is characterized in that it forms content and be calculated as with oxide compound: Fe
2O
3Be 46.5mol%～49mol%; ZnO is 0.2mol%～4.5mol%; NiO is 44mol%～49mol%; CoO is 0.3～2.5mol%.
In process of production, it can also include the nanometer V that silane coupling agent has carried out surface modification that passes through as the sintering fusing assistant of the 0.2wt%～0.5wt% that accounts for gross weight
2O
5
Initial permeability provided by the invention is the preparation method of 10 ± 20% nickel-zinc-ferrite material, and its step is as follows:
1) ball milling:
With the Fe that weighs up
2O
3, ZnO, NiO and CoO starting material put into sand mill, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, the ball milling time is 1 hour～2 hours;
2) pre-burning:
With a good starting material oven dry of ball milling, to put into electric furnace and carry out pre-burning, calcined temperature is 1000 ℃～1150 ℃, the pre-burning time is 1.5 hours～3.5 hours, furnace cooling after the pre-burning;
3) impurity adds:
Starting material gross weight 0.2wt%～0.5wt% is added in gradation, and selects the nanometer V that has carried out surface modification through silane coupling agent for use
2O
5As the sintering fusing assistant;
4) secondary ball milling:
Pre-imitation frosted glass is put into sand mill, add deionized water, the weight of deionized water is 0.9 times of starting material gross weight, impurity is divided into five equal portions and carries out the gradation interpolation, add pitch time is 10 minutes at every turn, total ball milling time is 2 hours～4 hours, requires powder average particle size behind the ball milling between 1.00 μ m～1.60 μ m;
6) forming and sintering:
The pre-imitation frosted glass oven dry that secondary ball milling is good, the polyvinyl alcohol that adds the 9wt%～14wt% of starting material gross weight, uniform mixing, the granulation of sieving, compression moulding, put into the box-type furnace sintering, sintering process takes two sections to impact sintering process, and at first sintering temperature is elevated within 1250 ℃～1350 ℃, be incubated 0.5 hour～1 hour, then sintering temperature is controlled within 1150 ℃～1250 ℃, soaking time is 1 hour～3 hours, and furnace cooling gets final product to room temperature.
Calcined temperature of the present invention is that 1000～1150 ℃, sintering process take two sections to impact sintering processs, have utmost point lower electromagnetic loss under the 2.65MHz frequency, only have the spinel phase in high frequency is low in energy consumption, initial permeability is 10 ± 20%, saturation magnetic flux density the is high nickel-zinc-ferrite material, do not have other dephasigns, grain-size is between 1.05～1.80 μ m.
Starting material are selected commercially pure Fe
2O
3, ZnO, NiO and CoO.Take by weighing various starting material according to the component molecules formula and carry out ball milling one time, one time ball-grinding machine is selected sand mill for use.In mechanical milling process, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, the ball milling time is 1～2 hour, and starting material are mixed.
Temperature range during pre-burning is 1000～1150 ℃, and calcined temperature is low excessively, will cause in the pre-burning process raw-material reaction incomplete, and this will be unfavorable for the follow-up sintering solid state reaction of powder.And if sintering temperature is too high, will cause pre-burning to finish the rapid reduction of the pre-imitation frosted glass reactive behavior in back, this makes the follow-up sintering temperature raise, thereby will worsen ferritic electromagnetic consumable characteristic.
Carried out the nanometer V of surface modification through silane coupling agent
2O
5As adding impurity.V
2O
5Fusing point be lower than 700 ℃, in sintering process, can under very low temperature, form liquid phase, the acceleration of sintering solid state reaction, thereby reduced sintering temperature effectively.But too much V
2O
5The interpolation meeting on the crystal boundary of ferritic spinel phase intergranule, form nonmagnetic glassy phase, this will produce a kind of magnetic dilution effect, cause the decline of saturation magnetization and magnetic permeability and the deterioration of electromagnetic consumable characteristic.And if select for use the process silane coupling agent to carry out the nanometer V of surface modification
2O
5Powder is as the sintering fusing assistant, because this nanometer V
2O
5Powder has very big specific surface area and quite high surface energy, and its fusing point will be lower, more helps the acceleration of sintering solid state reaction, thereby the amount of required interpolation will be still less, and this helps improving the magnetic property of nickel-zinc ferrite.Yet nano-powder material is reunited especially easily owing to have high surface energy, therefore before using, must carry out surface modification, in the present invention, we adopt silane coupling agent as surface-modifying agent it to be carried out surface modification, improve its dispersiveness with this.In addition, in order further to strengthen the dispersion effect of nano particle, the present invention has also adopted the substep additive process: be about to pre-imitation frosted glass and put into ball mill and carry out secondary ball milling process, nanometer V
2O
5Powder is divided into five equal portions and adds one by one, and be 10 minutes each pitch time of adding.
Average particle size behind the pre-imitation frosted glass secondary ball milling is between 1.00～1.60 μ m, and this makes preburning powdered material have certain sintering reaction activity, helps follow-up sintering reaction.
Initial permeability by present method preparation is 10 ± 20% nickel-zinc-ferrite material, has extremely low electromagnetic consumable under HF lamp without electrodes 2.65MHz operating frequency, and its quality factor Q is more than 260 when the 2.65MHz frequency; At 1MHz, under the 10mT test condition, power consumption is at 800kw/m
3Below; And this material also has high saturation magnetic flux density, and under the 16kA/m test condition, Bs is greater than 180mT.So good electromagnetic consumable characteristic can effectively ensure the works fine state of the reactance coil in the HF lamp without electrodes producer, reduces its thermal value, prolongs product life, therefore has good market outlook.Select to do further embodiment description according to the proportioning and the processing parameter of different components more below.
Embodiment 1
1) raw-material selection: initial permeability provided by the invention is 10 ± 20%, have high frequency lower electromagnetic loss and high saturation magnetic flux density under big working current, the starting material that can be used for making the nickel-zinc-ferrite material of high-frequency non-polar lamp power producer reactance coil are selected commercially pure Fe
2O
3, ZnO, NiO and CoO.
2) composition design and weighing: according to Fe
2O
3For 49mol%, ZnO are that 0.2mol%, NiO are that 49mol% and CoO are 1.8mol%.
3) raw-material mixing: the starting material that weigh up are put into sand mill, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, and the ball milling time is 2 hours.
4) pre-burning: with a good starting material oven dry of ball milling, put into electric furnace and carry out pre-burning, calcined temperature is 1150 ℃, and the pre-burning time is 1.5 hours, furnace cooling after the pre-burning.After the pre-burning, pre-imitation frosted glass is carried out the XRD facies analysis, determine only to have spinel structure in the pre-imitation frosted glass, do not have other dephasigns.
5) impurity adds: the nanometer V that selects to have carried out through silane coupling agent surface modification
2O
5Powder adds as impurity, and its addition is 0.5wt%.
6) secondary ball milling: the pre-imitation frosted glass that has added behind the impurity is put into sand mill, add deionized water, the weight of deionized water is 0.9 times of starting material gross weight, impurity is divided into five equal portions and carries out the gradation interpolation, add pitch time is 10 minutes at every turn, total ball milling time is 2 hours, requires powder average particle size behind the ball milling between 1.00～1.60 μ m.
7) forming and sintering: the pre-imitation frosted glass oven dry that secondary ball milling is good, the polyvinyl alcohol (PVA) that adds 14wt%, uniform mixing, the granulation of sieving, compression moulding, put into the box-type furnace sintering, sintering process takes two sections to impact sintering process, and at first sintering temperature is elevated within 1350 ℃, be incubated 0.5 hour, sintering temperature is controlled at 1250 ℃ then, soaking time is 1 hour, and furnace cooling gets final product to room temperature.
The magnetism testing of the sample ring for preparing carries out on Hp4284A electric impedance analyzer and HF Q meter, and the density of sample adopts buoyancy method to measure.
The magnetic property of sample and density measurement result are as shown in the table:
Table 1: the magnetic property of sintered sample and the test result of density:
From the table can see, it is 9.2 that the nickel-zinc ferrite sample of preparing has initial permeability, under the 2.65MHz frequency quality factor Q up to 272; Power consumption only is 757kw/m under 1MHz, 10mT test condition
3Saturation magnetic flux density is the good electric magnetic properties of 193mT.This material is particularly useful for making reactance coil in the HF lamp without electrodes producer, has reduced the thermal value of reactance coil, keeps the steady operation of reactance coil, helps prolonging product life, so good market prospects.
Embodiment 2
1) raw-material selection: initial permeability provided by the invention is 10 ± 20%, have high frequency lower electromagnetic loss and high saturation magnetic flux density under big working current, the starting material that can be used for making the nickel-zinc-ferrite material of high-frequency non-polar lamp power producer reactance coil are selected commercially pure Fe
2O
3, ZnO, NiO and CoO.
2) composition design and weighing: according to Fe
2O
3For 49mol%, ZnO are that 4.5mol%, NiO are that 44mol% and CoO are 2.5mol%.
3) raw-material mixing: the starting material that weigh up are put into sand mill, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, and the ball milling time is 1 hour.
4) pre-burning: with a good starting material oven dry of ball milling, put into electric furnace and carry out pre-burning, calcined temperature is 1000 ℃, and the pre-burning time is 3.5 hours, furnace cooling after the pre-burning.After the pre-burning, pre-imitation frosted glass is carried out the XRD facies analysis, determine only to have spinel structure in the pre-imitation frosted glass, do not have other dephasigns.
5) impurity adds: the nanometer V that selects to have carried out through silane coupling agent surface modification
2O
5Powder adds as impurity, and its addition is 0.2wt%.
6) secondary ball milling: the pre-imitation frosted glass that has added behind the impurity is put into sand mill, add deionized water, the weight of deionized water is 0.9 times of starting material gross weight, impurity is divided into five equal portions and carries out the gradation interpolation, add pitch time is 10 minutes at every turn, total ball milling time is 2 hours, requires powder average particle size behind the ball milling between 1.00～1.60 μ m.
7) forming and sintering: the pre-imitation frosted glass oven dry that secondary ball milling is good, the polyvinyl alcohol (PVA) that adds 14wt%, uniform mixing, the granulation of sieving, compression moulding, put into the box-type furnace sintering, sintering process takes two sections to impact sintering process, and at first sintering temperature is elevated to 1250 ℃, be incubated 1 hour, sintering temperature is controlled at 1150 ℃ then, soaking time is 3 hours, and furnace cooling gets final product to room temperature.
The magnetism testing of the sample ring for preparing carries out on Hp4284A electric impedance analyzer and HF Q meter, and the density of sample adopts buoyancy method to measure.
The magnetic property of sample and density measurement result are as shown in the table:
Table 2: the magnetic property of sintered sample and the test result of density:
From the table can see, it is 11.8 that the nickel-zinc ferrite sample of preparing has initial permeability, under the 2.65MHz frequency quality factor Q up to 263; Power consumption only is 742kw/m under 1MHz, 10mT test condition
3Saturation magnetic flux density is the good electric magnetic properties of 187mT.This material is particularly useful for making reactance coil in the HF lamp without electrodes producer, has reduced the thermal value of reactance coil, keeps the steady operation of reactance coil, helps prolonging product life, so good market prospects.
Embodiment 3
1) raw-material selection: initial permeability provided by the invention is 10 ± 20%, have high frequency lower electromagnetic loss and high saturation magnetic flux density under big working current, the starting material that can be used for making the nickel-zinc-ferrite material of high-frequency non-polar lamp power producer reactance coil are selected commercially pure Fe
2O
3, NiO and CoO.
2) composition design and weighing: according to Fe
2O
3For 46.5mol%, ZnO are that 4.2mol%, NiO are that 49mol% and CoO are 0.3mol%.
3) raw-material mixing: the starting material that weigh up are put into sand mill, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, and the ball milling time is 1.5 hours.
4) pre-burning: with a good starting material oven dry of ball milling, put into electric furnace and carry out pre-burning, calcined temperature is 1050 ℃, and the pre-burning time is 2 hours, furnace cooling after the pre-burning.After the pre-burning, pre-imitation frosted glass is carried out the XRD facies analysis, determine only to have spinel structure in the pre-imitation frosted glass, do not have other dephasigns.
5) impurity adds: the nanometer V that selects to have carried out through silane coupling agent surface modification
2O
5Powder adds as impurity, and its addition is 0.4wt%.
6) secondary ball milling: the pre-imitation frosted glass that has added behind the impurity is put into sand mill, add deionized water, the weight of deionized water is 0.9 times of starting material gross weight, impurity is divided into five equal portions and carries out the gradation interpolation, add pitch time is 10 minutes at every turn, total ball milling time is 3 hours, requires powder average particle size behind the ball milling between 1.00～1.60 μ m.
7) forming and sintering: the pre-imitation frosted glass oven dry that secondary ball milling is good, the polyvinyl alcohol (PVA) that adds 12wt%, uniform mixing, the granulation of sieving, compression moulding, put into the box-type furnace sintering, sintering process takes two sections to impact sintering process, and at first sintering temperature is elevated to 1300 ℃, be incubated 0.75 hour, sintering temperature is controlled at 1180 ℃ then, soaking time is 2 hours, and furnace cooling gets final product to room temperature.。
The magnetism testing of the sample ring for preparing carries out on Hp4284A electric impedance analyzer and HF Q meter, and the density of sample adopts buoyancy method to measure.
The magnetic property of sample and density measurement result are as shown in the table:
Table 3: the magnetic property of sintered sample and the test result of density:
From the table can see, it is 10.5 that the nickel-zinc ferrite sample of preparing has initial permeability, under the 2.65MHz frequency quality factor Q up to 269; Power consumption only is 795kw/m under 1MHz, 10mT test condition
3Saturation magnetic flux density is the good electric magnetic properties of 181mT.This material is particularly useful for making reactance coil in the HF lamp without electrodes producer, has reduced the thermal value of reactance coil, keeps the steady operation of reactance coil, helps prolonging product life, so good market prospects.
Claims (3)
1. an initial permeability is 10 ± 20% nickel-zinc-ferrite material, and its principal phase is a spinel structure, forms to comprise Fe
2O
3, ZnO, NiO and CoO, it is characterized in that it forms content and be calculated as with oxide compound:
Fe
2O
3Be 46.5mol%～49mol%;
ZnO is 0.2mol%～4.5mol%;
NiO is 44mol%～49mol%;
CoO is 0.3mol%～2.5mol%.
2. initial permeability according to claim 1 is 10 ± 20% nickel-zinc-ferrite material, it is characterized in that it also includes the nanometer V that silane coupling agent has carried out surface modification that passes through as the sintering fusing assistant of the 0.2wt%～0.5wt% that accounts for gross weight
2O
5
3. an initial permeability as claimed in claim 1 is the preparation method of 10 ± 20% nickel-zinc-ferrite material, it is characterized in that the step of method is as follows:
1) ball milling:
With the Fe that weighs up
2O
3, ZnO, NiO and CoO starting material put into sand mill, add deionized water, the weight of deionized water is 1.2 times of starting material gross weight, the ball milling time is 1 hour～2 hours;
2) pre-burning:
With a good starting material oven dry of ball milling, to put into electric furnace and carry out pre-burning, calcined temperature is 1000 ℃～1150 ℃, the pre-burning time is 1.5 hours～3.5 hours, furnace cooling after the pre-burning;
3) impurity adds:
Starting material gross weight 0.2wt%～0.5wt% is added in gradation, and selects the nanometer V that has carried out surface modification through silane coupling agent for use
2O
5As the sintering fusing assistant;
4) secondary ball milling:
Pre-imitation frosted glass is put into sand mill, add deionized water, the weight of deionized water is 0.9 times of starting material gross weight, impurity is divided into five equal portions and carries out the gradation interpolation, add pitch time is 10 minutes at every turn, total ball milling time is 2 hours～4 hours, requires powder average particle size behind the ball milling between 1.00 μ m～1.60 μ m;
5) forming and sintering:
The pre-imitation frosted glass oven dry that secondary ball milling is good, the polyvinyl alcohol that adds the 9wt%～14wt% of starting material gross weight, uniform mixing, the granulation of sieving, compression moulding, put into the box-type furnace sintering, sintering process takes two sections to impact sintering process, and at first sintering temperature is elevated within 1250 ℃～1350 ℃, be incubated 0.5 hour～1 hour, then sintering temperature is controlled within 1150 ℃～1250 ℃, soaking time is 1 hour～3 hours, and furnace cooling gets final product to room temperature.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102603278A (en) * | 2012-03-07 | 2012-07-25 | 天通控股股份有限公司 | Stress-resistant nickel zinc ferrite with initial permeability of 120, and preparation method of stress-resistant nickel zinc ferrite |
| CN105916814A (en) * | 2014-01-17 | 2016-08-31 | 沙特基础工业全球技术公司 | Development of nickel-zinc ferrites and methods for preparing same using iron-oxide byproducts of steel industry |
| CN117843358A (en) * | 2024-01-10 | 2024-04-09 | 安徽大学 | Soft magnetic ferrite with spinel structure and application thereof |
| CN118380259A (en) * | 2024-06-24 | 2024-07-23 | 朗峰新材料启东有限公司 | High-frequency anti-interference nanocrystalline magnetic core composite material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102603278A (en) * | 2012-03-07 | 2012-07-25 | 天通控股股份有限公司 | Stress-resistant nickel zinc ferrite with initial permeability of 120, and preparation method of stress-resistant nickel zinc ferrite |
| CN102603278B (en) * | 2012-03-07 | 2013-11-27 | 天通控股股份有限公司 | Stress-resistant nickel zinc ferrite with initial permeability of 120, and preparation method of stress-resistant nickel zinc ferrite |
| CN105916814A (en) * | 2014-01-17 | 2016-08-31 | 沙特基础工业全球技术公司 | Development of nickel-zinc ferrites and methods for preparing same using iron-oxide byproducts of steel industry |
| CN117843358A (en) * | 2024-01-10 | 2024-04-09 | 安徽大学 | Soft magnetic ferrite with spinel structure and application thereof |
| CN118380259A (en) * | 2024-06-24 | 2024-07-23 | 朗峰新材料启东有限公司 | High-frequency anti-interference nanocrystalline magnetic core composite material and preparation method thereof |
| CN118380259B (en) * | 2024-06-24 | 2024-09-17 | 朗峰新材料启东有限公司 | High-frequency anti-interference nanocrystalline magnetic core composite material and preparation method thereof |
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Application publication date: 20110831 |