CN101607816A - Nickel ferrite for radio frequency range and preparation method thereof - Google Patents
Nickel ferrite for radio frequency range and preparation method thereof Download PDFInfo
- Publication number
- CN101607816A CN101607816A CNA2009101007134A CN200910100713A CN101607816A CN 101607816 A CN101607816 A CN 101607816A CN A2009101007134 A CNA2009101007134 A CN A2009101007134A CN 200910100713 A CN200910100713 A CN 200910100713A CN 101607816 A CN101607816 A CN 101607816A
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- principal constituent
- radio frequency
- minor component
- ferrite
- oxide
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Links
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000470 constituent Substances 0.000 claims abstract description 36
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 10
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910000428 cobalt oxide Inorganic materials 0.000 claims abstract description 5
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910001935 vanadium oxide Inorganic materials 0.000 claims abstract description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000480 nickel oxide Inorganic materials 0.000 claims abstract description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical group O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000011572 manganese Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 17
- 238000010298 pulverizing process Methods 0.000 claims description 14
- 238000005245 sintering Methods 0.000 claims description 14
- 239000005338 frosted glass Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 239000011236 particulate material Substances 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- 230000035699 permeability Effects 0.000 abstract description 12
- 238000004891 communication Methods 0.000 abstract description 5
- 150000002815 nickel Chemical class 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 description 25
- 239000011162 core material Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 10
- 238000003801 milling Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000002596 correlated effect Effects 0.000 description 5
- 239000013530 defoamer Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000002791 soaking Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Nickel ferrite for radio frequency range and preparation method thereof the invention belongs to nickel series soft magnetic ferrite technical field, is specifically related to the low magnetic permeability Ni ferrite that a kind of radio band is suitable for.This ferritic principal constituent is ferric oxide, nickel oxide, and minor component comprises cobalt oxide, manganese oxide and vanadium oxide, adopts the conventional ceramic technique preparation.Nickel ferrite for radio frequency range of the present invention has low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high Curie temperature, is applicable to radio band communication class electronic devices and components.
Description
Technical field
The invention belongs to nickel series soft magnetic ferrite technical field, be specifically related to a kind of low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high Curie temperature, Ni ferrite that radio frequency is suitable for and preparation method thereof.
Background technology
Ferrite Material is having application very widely aspect the electronicss such as communication, digital electric, household electrical appliance.The nickel based ferrite has very large application market as a ferritic main series because of it has good radio-frequency performance in the communication class device.Particularly in the continuous development of the electron device in radio-frequency communication field, the demand of such Ferrite Material is vigorous day by day.
The radio frequency Ni ferrite has low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high characteristics such as Curie temperature.The radio frequency Ni ferrite in signal of communication electron-like device mainly as being widely used of aspects such as radio frequency inductive, impedance transformer, impedance matching box and anti-electromagnetic interference, of a great variety, the huge market demand.
Summary of the invention
The purpose of this invention is to provide a kind of nickel ferrite for radio frequency range, this ferrite has following excellent comprehensive performance: low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high characteristics such as Curie temperature can be good at satisfying radio band electronic devices and components performance demands; The preparation method of this nickel ferrite for radio frequency range is proposed simultaneously.
The cardinal principle of technical solution problem of the present invention is: adopt Fe
2O
3Molar content is 55%～65%, and all the other are the prescription of NiO, adds Co in minor component
2O
3Reduce the radio band relative loss factor factor and initial permeability, in minor component, add Mn
3O
4Promote resistivity of material, in minor component, add V
2O
5Reduce sintering temperature, adjust material microstructure, obtain good material behavior by production technique.
The technical solution adopted in the present invention is: a kind of nickel ferrite for radio frequency range, and this ferrite comprises principal constituent and minor component, principal constituent is: ferric oxide, nickel oxide is characterized in that described principal constituent is as follows in the content of standard substance separately:
Fe
2O
3：55mol％～65mol％，
NiO：45mol％～35mol％；
Described minor component comprises cobalt oxide, manganese oxide, vanadium oxide, described relatively principal constituent total amount, and described minor component is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The total content of meter is 1wt%～3wt%.
Described relatively principal constituent total amount, described minor component is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The content of meter is respectively: Co
2O
3: 0.5wt%～0.8wt%, Mn
3O
4: 0.5wt%～2.5wt%, V
2O
5: 0～1wt%.
Nickel ferrite for radio frequency range of the present invention adopts the manufacture method of conventional oxide method, and concrete steps are as follows successively:
(1) mix: by the principal constituent proportion ingredient, carry out wet-mixed together, mixing time is 30～60 minutes; Described principal constituent in the content of standard substance separately is: Fe
2O
3: 55mol%～65mol%, NiO:45mol%～35mol%;
(2) pre-burning: carry out pre-burning with adding in the rotary kiln after the principal constituent slip spraying drying, calcined temperature is controlled at 900 ℃～1000 ℃, and the pre-burning time is 20～40 minutes;
(3) pulverize: will go up and carry out wet pulverization after adding minor component in the pre-imitation frosted glass of principal constituent that the step pre-burning obtains, the pulverizing time is 120～180 minutes, pulverizes back slip particle diameter and is controlled at 1.5 μ m～2.0 μ m; Described minor component comprises cobalt oxide, manganese oxide, vanadium oxide, described relatively principal constituent total amount, and described minor component is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The total content of meter is 1wt%～3wt%;
(4) granulation: the slip in the last step adds 1.5%PVA, adopts mist projection granulating, obtains particulate material;
(5) compacting: the particulate material that will go up the step adopts the powder former compacting to obtain blank, and the pressed density of blank is controlled at 3.0 ± 0.2g/cm
3
(6) sintering: will go up blank sintering in air atmosphere that the step obtains, sintering temperature is controlled at 1100 ℃～1200 ℃, is incubated 3 hours and carries out sintering, makes described Ni ferrite goods through cooling again.
As a kind of preferred, the minor component that in the pre-imitation frosted glass of principal constituent, adds in the described pulverising step, described relatively principal constituent total amount is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The content of meter is respectively: Co
2O
3: 0.5wt%～0.8wt%, Mn
3O
4: 0.5wt%～2.5wt%, V
2O
5: 0～1wt%.
Mixing of the minor component of the present invention by rational principal constituent proportioning and optimization is equipped with suitable process conditions, and this ferrite has low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high characteristics such as Curie temperature; Specifically, the initial permeability μ of the nickel ferrite for radio frequency range that makes of the present invention
iFor: 10 ± 25% (10kHz, 0.25mT, 25 ℃ ± 3 ℃), the relative loss factor factor t an δ/μ of its radio frequency rate
iBe not more than 570 * 10
-6(120MHz, 0.25mT, 25 ℃ ± 3 ℃), Curie temperature is not less than 300 ℃.Ni ferrite of the present invention is superior in the over-all properties of radio band, and performances such as its initial permeability, the relative loss factor factor and Curie temperature can be good at satisfying radio band electronic devices and components performance demands.The relative loss factor factor that particularly 50～500MHz is low can be good at reducing the loss of signal transmission.
The present invention has following characteristics compared with prior art: low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high characteristics such as Curie temperature can be good at satisfying radio band electronic devices and components performance demands.
Embodiment
Embodiment 1
Take by weighing the Fe of 59%mol
2O
3, 41%mol NiO.After above-mentioned principal constituent mixing, add in the sand mill and mix, mixing time 30 minutes is sent into rotary kiln after the spraying drying, pre-burning under 950 ℃ ± 10 ℃ temperature, 30 minutes pre-burning time kind.In pre-imitation frosted glass, add minor component input sand mill subsequently and pulverize, 120 minutes pulverizing time, pulverize back slip particle diameter and be controlled at 1.5～2.0 μ m; Described relatively principal constituent total amount, described minor component in its separately the content of standard substance be respectively (wt%): Co
2O
3: 0.7, Mn
3O
4: 1.5, V
2O
5: 0.05.Need to add pure water 35% in described mixing sand milling and the pulverizing sand grinding process, and dispersion agent and defoamer.The spray tower mist projection granulating obtains the Ni ferrite particle behind the PVA of last adding 1.5% in the sand milling slip.
Get the toroidal core of this particle 2.5 gram moulding compacting Φ 12.7mm * Φ 7.9mm * h6.5mm, pressed density is controlled at 3.0 ± 0.2g/cm
3, in air atmosphere, carry out sintering under 1170 ℃ ± 10 ℃ the temperature condition, soaking time 3 hours, back naturally cooling.
Through the magnetic core of said process preparation, as shown in table 1 with the correlated performance of instrument test magnetic cores such as HP4284ALCR tester, HP4291B radio frequency material instrument, SY8258BH analyser, high cryostat.
Embodiment 2
Get the Fe of 61%mol
2O
3, 39%mol NiO.After above-mentioned principal constituent mixing, add in the sand mill and mix, mixing time 30 minutes is sent into rotary kiln after the spraying drying, pre-burning under 950 ℃ ± 10 ℃ temperature, 30 minutes pre-burning time kind.In pre-imitation frosted glass, add minor component input sand mill subsequently and pulverize, 120 minutes pulverizing time, pulverize back slip particle diameter and be controlled at 1.5～2.0 μ m; Described relatively principal constituent total amount, described minor component in its separately the content of standard substance be respectively (wt%): Co
2O
3: 0.7, Mn
3O
4: 1.5, V
2O
5: 0.05.Need to add pure water 35% in described mixing sand milling and the pulverizing sand grinding process, and dispersion agent and defoamer.The spray tower mist projection granulating obtains the Ni ferrite particle behind the PVA of last adding 1.5% in the sand milling slip.
Get the toroidal core of this particle 2.5 gram moulding compacting Φ 12.7mm * Φ 7.9mm * h6.5mm, pressed density is controlled at 3.0 ± 0.2g/cm
3, in air atmosphere, carry out sintering under 1170 ℃ ± 10 ℃ the temperature condition, soaking time 3 hours, back naturally cooling.
Through the magnetic core of said process preparation, as shown in table 1 with the correlated performance of instrument test magnetic cores such as HP4284A LCR tester, HP4291B radio frequency material instrument, SY8258BH analyser, high cryostat.
Embodiment 3
Get the Fe of 59%mol
2O
3, 41%mol NiO.After above-mentioned principal constituent mixing, add in the sand mill and mix, mixing time 30 minutes is sent into rotary kiln after the spraying drying, pre-burning under 950 ℃ ± 10 ℃ temperature, 30 minutes pre-burning time kind.In pre-imitation frosted glass, add minor component input sand mill subsequently and pulverize, 120 minutes pulverizing time, pulverize back slip particle diameter and be controlled at 1.5～2.0 μ m; Described relatively principal constituent total amount, described minor component in its separately the content of standard substance be respectively (wt%): Co
2O
3: 0.75, Mn
3O
4: 1.5, V
2O
5: 0.05.Need to add pure water 35% in described mixing sand milling and the pulverizing sand grinding process, and dispersion agent and defoamer.The spray tower mist projection granulating obtains the Ni ferrite particle behind the PVA of last adding 1.5% in the sand milling slip.
Get the toroidal core of this particle 2.5 gram moulding compacting Φ 12.7mm * Φ 7.9mm * h6.5mm, pressed density is controlled at 3.0 ± 0.2g/cm
3, in air atmosphere, carry out sintering under 1170 ℃ ± 10 ℃ the temperature condition, soaking time 3 hours, back naturally cooling.
Through the magnetic core of said process preparation, as shown in table 1 with the correlated performance of instrument test magnetic cores such as HP4284A LCR tester, HP4291B radio frequency material instrument, SY8258BH analyser, high cryostat.
Comparative Examples 1
Get the Fe of 53%mol
2O
3, 47%mol NiO.After above-mentioned principal constituent mixing, add in the sand mill and mix, mixing time 30 minutes is sent into rotary kiln after the spraying drying, pre-burning under 950 ℃ ± 10 ℃ temperature, 30 minutes pre-burning time kind.In pre-imitation frosted glass, add minor component input sand mill subsequently and pulverize, 120 minutes pulverizing time, pulverize back slip particle diameter and be controlled at 1.5～2.0 μ m; Described relatively principal constituent total amount, described minor component in its separately the content of standard substance be respectively (wt%): Co
2O
3: 0.75, Mn
3O
4: 1.5, V
2O
5: 0.05.Need to add pure water 35% in described mixing sand milling and the pulverizing sand grinding process, and dispersion agent and defoamer.The spray tower mist projection granulating obtains the Ni ferrite particle behind the PVA of last adding 1.5% in the sand milling slip.
Get the toroidal core of this particle 2.5 gram moulding compacting Φ 2.7mm * Φ 7.9mm * h6.5mm, pressed density is controlled at 3.0 ± 0.2g/cm
3, in air atmosphere, carry out sintering under 1170 ℃ ± 10 ℃ the temperature condition, soaking time 3 hours, back naturally cooling.
Through the magnetic core of said process preparation, as shown in table 1 with the correlated performance of instrument test magnetic cores such as HP4284A LCR tester, HP4291B radio frequency material instrument, SY8258BH analyser, high cryostat.
Comparative Examples 2
Get the Fe of 53%mol
2O
3, 47%mol NiO.After above-mentioned principal constituent mixing, add in the sand mill and mix, mixing time 30 minutes is sent into rotary kiln after the spraying drying, pre-burning under 950 ℃ ± 10 ℃ temperature, 30 minutes pre-burning time kind.In pre-imitation frosted glass, add minor component input sand mill subsequently and pulverize, 120 minutes pulverizing time, pulverize back slip particle diameter and be controlled at 1.5～2.0 μ m; Described relatively principal constituent total amount, described minor component in its separately the content of standard substance be respectively (wt%): Co
2O
3: 1.0, Mn
3O
4: 1.5, V
2O
5: 0.05.Need to add pure water 35% in described mixing sand milling and the pulverizing sand grinding process, and dispersion agent and defoamer.The spray tower mist projection granulating obtains the Ni ferrite particle behind the PVA of last adding 1.5% in the sand milling slip.
Get the toroidal core of this particle 2.5 gram moulding compacting Φ 12.7mm * Φ 7.9mm * h6.5mm, pressed density is controlled at 3.0 ± 0.2g/cm
3, in air atmosphere, carry out sintering under 1170 ℃ ± 10 ℃ the temperature condition, soaking time 3 hours, back naturally cooling.
Through the magnetic core of said process preparation, as shown in table 1 with the correlated performance of instrument test magnetic cores such as HP4284A LCR tester, HP4291B radio frequency material instrument, SY8258BH analyser, high cryostat.
Embodiment that contrast is above and Comparative Examples are as can be seen, radio frequency Ni ferrite of the present invention has low-down initial permeability, good radio frequency loss performance, broad frequency domain characteristic, high characteristics such as Curie temperature, stable production technique and good performance, the service requirements of satisfying the radio band electronic devices and components that can be good.
Table 1 toroidal core material property of the present invention
| Project | Initial permeability μ i??10kHz、0.25mT、25℃ | Relative loss factor factor t an δ/μ i??120MHz、0.25mT | Curie temperature Tc (℃) 10kHz, 0.25mT | Saturation induction density Bs (mT) 4000A/m |
| Embodiment 1 | ??10.2 | ??530×10 -6 | ??＞300 | ??243 |
| Embodiment 2 | ??10.8 | ??550×10 -6 | ??＞300 | ??235 |
| Embodiment 3 | ??11.5 | ??526×10 -6 | ??＞300 | ??231 |
| Comparative Examples 1 | ??13.5 | ??621×10 -6 | ??＞300 | ??256 |
| Comparative Examples 2 | ??6.6 | ??1164×10 -6 | ??＞300 | ??157 |
Claims (4)
1. nickel ferrite for radio frequency range, this ferrite comprises principal constituent and minor component, principal constituent is: ferric oxide, nickel oxide is characterized in that described principal constituent is as follows in the content of standard substance separately:
Fe
2O
3：55mol％～65mol％
NiO：45mol％～35mol％
Described minor component comprises cobalt oxide, manganese oxide, vanadium oxide, described relatively principal constituent total amount, and described minor component is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The total content of meter is 1wt%～3wt%.
2. nickel ferrite for radio frequency range as claimed in claim 1 is characterized in that: described relatively principal constituent total amount, described minor component is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The content of meter is respectively: Co
2O
3: 0.5wt%～0.8wt%, Mn
3O
4: 0.5wt%～2.5wt%, V
2O
5: 0～1wt%.
3. the preparation method of nickel ferrite for radio frequency range as claimed in claim 1 or 2 is characterized in that concrete steps are as follows successively:
(1) mix: by claim 1 principal constituent proportion ingredient, carry out wet-mixed together, mixing time is 30～60 minutes; Described principal constituent in the content of standard substance separately is: Fe
2O
3: 55mol%～65mol%, NiO:45mol%～35mol%;
(2) pre-burning: carry out pre-burning with adding in the rotary kiln after the principal constituent slip spraying drying, calcined temperature is controlled at 900 ℃～1000 ℃, and the pre-burning time is 20～40 minutes;
(3) pulverize: will go up and carry out wet pulverization after adding minor component in the pre-imitation frosted glass of principal constituent that the step pre-burning obtains, the pulverizing time is 120～180 minutes, pulverizes back slip particle diameter and is controlled at 1.5 μ m～2.0 μ m; Described minor component comprises cobalt oxide, manganese oxide, vanadium oxide, described relatively principal constituent total amount, and described minor component is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The total content of meter is 1wt%～3wt%;
(4) granulation: the slip in the last step adds 1.5%PVA, adopts mist projection granulating, obtains particulate material;
(5) compacting: the particulate material that will go up the step adopts the powder former compacting to obtain blank, and the pressed density of blank is controlled at 3.0 ± 0.2g/cm
3
(6) sintering: will go up blank sintering in air atmosphere that the step obtains, sintering temperature is controlled at 1100 ℃～1200 ℃, is incubated 3 hours and carries out sintering, makes described Ni ferrite goods through cooling again.
4. the preparation method of nickel ferrite for radio frequency range as claimed in claim 3 is characterized in that: the minor component that adds in the pre-imitation frosted glass of principal constituent in the described pulverising step, described relatively principal constituent total amount is with its standard substance Co separately
2O
3, Mn
3O
4, V
2O
5The content of meter is respectively: Co
2O
3: 0.5wt%～0.8wt%, Mn
3O
4: 0.5wt%～2.5wt%, V
2O
5: 0～1wt%.
Priority Applications (1)
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|---|---|---|---|
| CN200910100713A CN101607816B (en) | 2009-07-15 | 2009-07-15 | Nickel ferrite for radio frequency range and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910100713A CN101607816B (en) | 2009-07-15 | 2009-07-15 | Nickel ferrite for radio frequency range and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101607816A true CN101607816A (en) | 2009-12-23 |
| CN101607816B CN101607816B (en) | 2012-09-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272195A (en) * | 2015-11-23 | 2016-01-27 | 杭州电子科技大学 | NiZn series ferrite wave-absorbing material core and manufacturing method thereof |
| CN112441828A (en) * | 2020-12-08 | 2021-03-05 | 江门安磁电子有限公司 | Ferrite material and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222487C (en) * | 2002-07-05 | 2005-10-12 | 邓廷成 | High-conductive nickel-zinc ferrite and preparing process thereof |
| JP2006160584A (en) * | 2004-12-10 | 2006-06-22 | Sumida Corporation | Ni-Zn-BASED FERRITE COMPOSITION AND ANTENNA COIL |
| CN101412622A (en) * | 2008-10-31 | 2009-04-22 | 天通控股股份有限公司 | High-frequency nickel-copper-zinc ferrite and preparation thereof |
-
2009
- 2009-07-15 CN CN200910100713A patent/CN101607816B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272195A (en) * | 2015-11-23 | 2016-01-27 | 杭州电子科技大学 | NiZn series ferrite wave-absorbing material core and manufacturing method thereof |
| CN112441828A (en) * | 2020-12-08 | 2021-03-05 | 江门安磁电子有限公司 | Ferrite material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN101607816B (en) | 2012-09-05 |
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