JP6599191B2 - 向上した共鳴周波数を有する改良z型六方晶フェライト材料 - Google Patents
向上した共鳴周波数を有する改良z型六方晶フェライト材料 Download PDFInfo
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- JP6599191B2 JP6599191B2 JP2015191386A JP2015191386A JP6599191B2 JP 6599191 B2 JP6599191 B2 JP 6599191B2 JP 2015191386 A JP2015191386 A JP 2015191386A JP 2015191386 A JP2015191386 A JP 2015191386A JP 6599191 B2 JP6599191 B2 JP 6599191B2
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- hexagonal ferrite
- improved
- frequency
- atoms
- resonant frequency
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- 239000000463 material Substances 0.000 title claims description 142
- 229910000859 α-Fe Inorganic materials 0.000 title claims description 85
- 238000000034 method Methods 0.000 claims description 64
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 57
- 239000000203 mixture Substances 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 25
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical group [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229910052788 barium Inorganic materials 0.000 claims description 12
- 239000002243 precursor Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000005245 sintering Methods 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical group [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims 1
- 230000035699 permeability Effects 0.000 description 35
- 230000005291 magnetic effect Effects 0.000 description 29
- 239000000843 powder Substances 0.000 description 20
- 239000013078 crystal Substances 0.000 description 14
- 238000006467 substitution reaction Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- 150000002500 ions Chemical class 0.000 description 10
- 239000003989 dielectric material Substances 0.000 description 9
- 238000001453 impedance spectrum Methods 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 7
- 229910052783 alkali metal Inorganic materials 0.000 description 7
- 150000001340 alkali metals Chemical class 0.000 description 7
- 238000003801 milling Methods 0.000 description 7
- 238000002791 soaking Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 230000005415 magnetization Effects 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052712 strontium Inorganic materials 0.000 description 4
- 229910052769 Ytterbium Inorganic materials 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011363 dried mixture Substances 0.000 description 3
- 238000010316 high energy milling Methods 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- DROIAQNRBCUCDS-UHFFFAOYSA-N barium cobalt Chemical compound [Co][Ba] DROIAQNRBCUCDS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 230000005350 ferromagnetic resonance Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000001566 impedance spectroscopy Methods 0.000 description 2
- 229910021644 lanthanide ion Inorganic materials 0.000 description 2
- -1 potassium (K) Chemical class 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000157 electrochemical-induced impedance spectroscopy Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000003826 uniaxial pressing Methods 0.000 description 1
Classifications
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/004—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using non-directional dissipative particles, e.g. ferrite powders
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
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- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
- C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium
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- H01F17/04—Fixed inductances of the signal type with magnetic core
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- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- H01—ELECTRIC ELEMENTS
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- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
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- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H01Q1/48—Earthing means; Earth screens; Counterpoises
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Description
本出願は、「z型六方晶フェライト材料」と題された、2014年9月30日に出願された米国仮出願番号第62/057,827号の利益を主張し、その全体が引用により本明細書に援用される。
(式中、deff/d0は小型化率であり、εrはアンテナ材料の誘電率であり、μrはアンテナ材料の透磁率である。εrおよびμrはともに磁性酸化物アンテナにおける周波数に依存する。)
次に、有効帯域幅(または効率)は、以下の式によって定められる。
(式中、η/η0は材料の効率(または帯域幅)を示す。)
この効率は、μrが最大化されると最大化される。さらに、μr=εrである場合、自由空間に対する完全なインピーダンス整合が存在する。したがって、小型化率は、ある周波数における透磁率および誘電率の積の平方根に比例する。したがって、無線周波数放射との磁気相互作用を利用して、Co2Z部品などの誘電体部品とともにアンテナを小型化することができる。さらに、材料が絶縁性となり、誘電率および透磁率ができるかぎり互いに近づくことにより、インピーダンス不整合および反射損失を極力抑えるのに有利となり得る。
上記のように、小型化アンテナシステムにおいて使用されるCo2Zなどの誘電材料の共鳴周波数を増加させることが有利となり得る。特に、500MHz、700MHz、900MHz、または1GHzを超える周波数における動作は、最小限の/許容できる信号損失を有するとともに、該材料を用いてより多くの信号が使用可能となるため、より広い信号の使用可能範囲が得られる。これは特に、商業的にも軍事的にも使用される高マイクロ波周波数用途に有用となり得る。以下に開示される材料の実施形態は、少なくとも一部はCo2Z結晶格子構造内の特定の原子の置換により、このように高い動作周波数を達成可能である。さらに、開示されるCo2Z材料の実施形態は、かなり低い損失を有し得る。
図4は、いくつかの実施形態に係るCo2Z材料を形成する方法100を示す。図4に示されるように、適量の前駆材料、すなわち、磁気材料を形成可能なバリウム、コバルト、鉄、1つ以上のアルカリ金属、および酸素を与え得る反応物質がステップ102でともに混合される。いくつかの実施形態では、酸素の少なくとも一部が、バリウム(Ba)、コバルト(Co)、鉄(Fe)、または1つ以上のアルカリ金属の酸素含有化合物の形態で提供されてもよい。たとえば、これらの元素は、炭酸塩もしくは酸化物の形態で、または当該技術分野で知られている他の酸素含有前駆体の形態で提供されてもよい。いくつかの実施形態では、1つ以上の前駆材料は、非酸素含有化合物または純粋な元素の形態で提供されてもよい。いくつかの実施形態では、酸素は、たとえばH2O2などの別個の化合物から、またはガス状酸素または空気から供給されてもよい。たとえば、いくつかの実施形態では、BaCO3、Co3O4、およびFe2O3前駆体は、約0.06重量%〜約3.6重量%のK2CO3とともに、Co2Zの形成に適切な比(たとえば、約22重量%BaCO3、約6重量%Co3O4、および約72重量%Fe2O3)で混合される。これらの前駆化合物は、たとえばコーレスミキサ、ボールミル、または振動ミルを用いて水またはアルコール中で混合または配合されてもよい。これらの前駆体は、乾式で配合されてもよい。
上に開示された誘電材料の実施形態、および製造方法は、さまざまな無線周波数装置の製造に使用可能である。これらの装置には、限定されないが、フィルタ、アイソレータ、サーキュレータ、共振器、携帯電話部品、ラップトップ部品、個人用携帯情報端末部品、タブレット部品、または基地局部品が含まれる。さらに、開示された誘電材料は、Bluetooth(登録商標)信号などの携帯または無線周波数信号に関連する部品において使用可能である。いくつかの実施形態では、開示された誘電材料は、高周波数アンテナなどのアンテナに使用可能である。開示された誘電材料の実施形態が組込まれる装置のタイプは、限定されないが、以下にいくつかの例を示す。
Claims (18)
- 一部のバリウム原子がストロンチウム原子に置換され、一部の鉄原子がアルミニウム原子に置換された、向上したz型六方晶フェライトを含み、前記向上したz型六方晶フェライトは、式Ba3−xSrxCo2Fe24−yAlyO41を有し、xは、0<x≦1.5であり、yは、0<y≦0.3であり、500MHzを超える共鳴周波数を有し、前記材料は焼結物である、高共鳴周波数材料組成物。
- x=1.5、y=0.3である、請求項1に記載の高共鳴周波数材料組成物。
- 前記向上したz型六方晶フェライトは、1GHzを超える共鳴周波数を有する、請求項1に記載の高共鳴周波数材料組成物。
- 請求項1に記載の前記高共鳴周波数材料組成物を含む、無線周波数装置。
- 請求項1に記載の前記高共鳴周波数材料組成物を含む、高周波数アンテナ。
- 前記六方晶フェライトは、700MHzを超える共鳴周波数を有する、請求項1に記載の高共鳴周波数材料組成物。
- 前記六方晶フェライトは、900MHzを超える共鳴周波数を有する、請求項1に記載の高共鳴周波数材料組成物。
- 無線周波数デバイスの形成方法であって、前記方法は、
バリウム、コバルト、鉄、および酸素を含む前駆材料の混合物を配合するステップと、
前記混合物を乾燥させ、加熱し、粉砕してプレス成形するステップと、
前記プレス成形された粒子を焼結して、Ba3−xSrxCo2Fe24−yAlyO41の組成を有する六方晶フェライト材料を形成するステップとを含み、xは、0<x≦1.5であり、yは、0<y≦0.3であり、さらに
前記六方晶フェライト材料から無線周波数デバイスを形成するステップを含む、方法。 - 前記六方晶フェライト材料は、900MHzを超える共鳴周波数を有する、請求項8に記載の方法。
- 前記無線周波数デバイスは、アンテナである、請求項8に記載の方法。
- 前記六方晶フェライト材料は、1GHzを超える共鳴周波数を有する、請求項8に記載の方法。
- x=1.5、y=0.3である、請求項8に記載の方法。
- 前記六方晶フェライト材料は、700MHzを超える共鳴周波数を有する、請求項8に記載の方法。
- 無線周波数デバイスのためのサーキュレータであって、前記サーキュレータは、
一部のバリウム原子がストロンチウム原子に置換され、一部の鉄原子がアルミニウム原子に置換された、向上したz型六方晶フェライトを含み、前記向上したz型六方晶フェライトは、式Ba3−xSrxCo2Fe24−yAlyO41を有し、xは、0<x≦1.5であり、yは、0<y≦0.3であり、500MHzを超える共鳴周波数を有し、前記材料は焼結物である、サーキュレータ。 - 前記六方晶フェライト材料は、1GHzを超える共鳴周波数を有する、請求項14に記載のサーキュレータ。
- x=1.5、y=0.3である、請求項14に記載のサーキュレータ。
- 前記六方晶フェライト材料は、700MHzを超える共鳴周波数を有する、請求項14に記載のサーキュレータ。
- 前記六方晶フェライト材料は、900MHzを超える共鳴周波数を有する、請求項14に記載のサーキュレータ。
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US20180366835A1 (en) | 2018-12-20 |
US11069983B2 (en) | 2021-07-20 |
JP7191798B2 (ja) | 2022-12-19 |
CN105541315B (zh) | 2021-03-26 |
EP3002266B1 (en) | 2019-05-01 |
EP3002266A1 (en) | 2016-04-06 |
JP2020007224A (ja) | 2020-01-16 |
CN105541315A (zh) | 2016-05-04 |
US10027035B2 (en) | 2018-07-17 |
US20170098896A1 (en) | 2017-04-06 |
JP2017071511A (ja) | 2017-04-13 |
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