JP2017528403A - 極超短波アンテナの使用のためのCo2Z−型のフェライト複合材料 - Google Patents
極超短波アンテナの使用のためのCo2Z−型のフェライト複合材料 Download PDFInfo
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- JP2017528403A JP2017528403A JP2017505113A JP2017505113A JP2017528403A JP 2017528403 A JP2017528403 A JP 2017528403A JP 2017505113 A JP2017505113 A JP 2017505113A JP 2017505113 A JP2017505113 A JP 2017505113A JP 2017528403 A JP2017528403 A JP 2017528403A
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 106
- 239000002131 composite material Substances 0.000 title description 9
- 239000000203 mixture Substances 0.000 claims abstract description 106
- 230000035699 permeability Effects 0.000 claims abstract description 33
- 229910052741 iridium Inorganic materials 0.000 claims abstract description 28
- 229910052788 barium Inorganic materials 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 31
- 239000000843 powder Substances 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 16
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 15
- 239000002243 precursor Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 239000011230 binding agent Substances 0.000 claims description 9
- 229910020599 Co 3 O 4 Inorganic materials 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 229920000609 methyl cellulose Polymers 0.000 claims description 3
- 239000001923 methylcellulose Substances 0.000 claims description 3
- -1 poly (alkylene carbonate Chemical compound 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 239000013078 crystal Substances 0.000 description 9
- 238000004891 communication Methods 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 150000001552 barium Chemical class 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9646—Optical properties
Abstract
Description
この出願は、「極超短波応用(0.3〜1GHz)のための同一の誘電率及び透磁率を有する低損失率のCo2Zフェライト複合材」と題する2014年7月31日に出願された米国仮出願第62/031,369号の35§119(e)に基づく優先権を主張し、参照によってその開示が本明細書に組み入れられる。
連邦援助研究または開発に関する陳述
適用なし
1.Ba、Co、FeおよびIrを含むフェライト組成物であって、当該フェライト組成物がZ型のヘキサフェライト相およびY型のヘキサフェライト相を含む、前記フェライト組成物。
2.式
Ba3Co(2+x)IrxFe(24−2x)O41
式中、x=0.05〜0.20
で表される項目1に記載のフェライト組成物。
3.x=0.12〜0.15である、項目2に記載のフェライト組成物。
4.Z型のヘキサフェライト相が65vol%〜97.5vol%の範囲にあり、およびY型のヘキサフェライト相が2.5vol%〜35vol%の範囲にある、項目1〜3のいずれかに記載のフェライト組成物。
5.Z型のヘキサフェライト相が65vol%〜97.5vol%の範囲にあり、およびY型のヘキサフェライト相が残りを含む、項目1〜3のいずれかに記載のフェライト組成物。
6.さらにBi2O3を0.2〜5.0重量%の範囲で含む、項目1〜4のいずれかに記載のフェライト組成物。
7.Bi2O3がZ型のヘキサフェライト相とY型のヘキサフェライト相の粒界にある、項目1〜4、6のいずれかに記載のフェライト組成物。
8.フェライト組成物が約7から約8の範囲の実誘電率を有する、項目1〜7のいずれかに記載のフェライト組成物。
9.フェライト組成物が約7から約8の範囲の実透磁率を有する、項目1〜8のいずれかに記載のフェライト組成物。
10.フェライト組成物の実誘電率とフェライト組成物の実透磁率が10%以内で等しい、項目1〜9のいずれかに記載のフェライト組成物。
12.フェライト組成物が、0.65〜0.85GHzの周波数域に対して、0.05〜0.07の範囲にある誘電損失正接tanδεを有する、項目1〜11のいずれかに記載のフェライト組成物。
13.フェライト組成物が、0.65〜0.85GHzの周波数域に対して、0.07〜0.29の範囲にある磁気損失正接tanδμを有する、項目1〜12のいずれかに記載のフェライト組成物。
14.フェライト組成物が、周波数0.8GHzにおける誘電損率tanδε/ε’=0.008±20%を有する、項目1〜13のいずれかに記載のフェライト組成物。
15.フェライト組成物が、周波数0.8GHzにおける磁気損失率tanδμ/μ’=0.037±10%を有する、項目1〜14のいずれかに記載のフェライト組成物。
16.項目1〜15のいずれかに記載のフェライト組成物を含む部品。
17.部品がアンテナ、フィルタ、インダクタ、サーキュレータ、または位相シフタである、項目1〜16のいずれかに記載の部品。
18.部品がマイクロ波アンテナである、項目1〜17のいずれかに記載の部品。
19.部品が0.1GHz以上の周波数で動作可能のアンテナである、項目1〜18のいずれかに記載の部品。
20.部品が0.3GHz以上の周波数で動作可能のアンテナである、項目1〜19のいずれかに記載の部品。
22.部品が0.3〜1.0GHzで動作可能のアンテナである、項目1〜18および22のいずれかに記載の部品。
23.(a)Fe、Ba、Co、およびIrを含むヘキサフェライト相前駆体化合物を提供する工程と、
(b)ヘキサフェライト相前駆体化合物を空気中で焼成し、Z型のヘキサフェライト相およびY型のヘキサフェライト相を含む材料を形成する工程と
を含む、フェライト組成物の製造方法。
24.ヘキサフェライト相前駆体化合物がFe、Ba、Co、およびIrの酸化物を含む、項目23に記載の方法。
25.ヘキサフェライト相前駆体化合物が、IrO2、BaCO3、Co3O4、およびFe2O3を含む、請求項23または24に記載の方法。
26.ヘキサフェライト相前駆体化合物が、0.2〜2重量%のIrO2、20〜25重量%のBaCO3、5〜7重量%のCo3O4、および68〜74重量%のFe2O3を含む、項目23〜25のいずれかに記載の方法。
27.工程(b)において、前駆体化合物が1000〜1200℃で、2〜10時間焼成される、項目23〜26のいずれかに記載の方法。
28.工程(b)の後で、Bi2O3を添加する工程をさらに含む、項目23〜27のいずれかに記載の方法。
29.Bi2O3が0.2〜5.0重量%の範囲である、項目23〜28のいずれかに記載の方法。
(d)粉体混合物を焼結する工程と
をさらに含む、項目23〜29のいずれかに記載の方法。
31.粉体混合物を1250〜1280℃で焼結する、項目23〜30のいずれかに記載の方法。
32.粉体混合物を2〜10時間焼結する、項目23〜31のいずれかに記載の方法。
33.粉体混合物を酸素雰囲気で焼結する、項目23〜32のいずれかに記載の方法。
34.工程(d)の前に、粉体混合物を成形体に形成する工程をさらに含む、項目23〜33のいずれかに記載の方法。
35.粉体混合物にバインダーを添加する工程をさらに含む、項目23〜34のいずれかに記載の方法。
36.バインダーがポリビニルアルコール、メチルセルロース、ポリエチレングリコール、およびポリ(アルキレンカーボナート)からなる群から選択される、項目23〜35のいずれかに記載の方法。
37.ポリビニルアルコールが8重量%〜12重量%の粉体混合物を含む、項目23〜36のいずれかに記載の方法。
Ba3Co(2+x)IrxFe(24−2x)O41
を有する。いくつかの態様において、x=0.05〜0.2である。他の態様において、x=0.12〜0.15である。
他の態様において、粉末混合物は、焼結前のテープキャスティングまたは付加製造などの機構によって形成することができる。
フェライト組成物は、高周波またはマイクロ波アンテナ、フィルタ、インダクタ、サーキュレータまたは位相シフタのようなUHF範囲内で動作可能なさまざまなデバイスに使用することができる。いくつかの態様において、デバイスは、0.1GHzを超える周波数で動作可能であり、他の態様では、0.3GHzを超える周波数で動作可能である。このデバイスは、0.1〜1.5GHzの周波数範囲にわたって動作可能である。他の態様において、デバイスは、0.3〜1.0GHzの周波数範囲にわたって動作可能である。かかるデバイスは、商業および軍事応用、気象レーダ、科学通信、移動および無線通信、自律走行車、航空機通信、宇宙通信、衛星通信、および監視に使用することができる。
Ba3Co2+xIrxFe24−2xO41(ここで、x=0、0.05、0.10、0.15および0.20)の組成を有する多結晶性のCo2Zフェライトを、セラミックプロセスによって調製した。BaCO3、IrO2、Co3O4およびFe2O3の原料を大気中1000℃で6時間焼成してフェライト相を形成させた後、粗粉砕し、ボールミル粉砕をした。90容積%のフェライト微粉末と10容積%のポリビニルアルコール(PVA)バインダーを含む混合物を調製し、外径7mm、内径3mm、幅約2mmのトロイドにプレスした。この試料サイズは、マイクロ波測定に適している。フェライト試料を酸素雰囲気中で1250〜1280℃で4時間焼結した。
複合フェライトの実および複素の誘電率および透磁率に及ぼす添加剤Bi2O3の影響も調べた。マイクロ波測定のために、さまざまな量のBi2O3(0.2〜5.0重量%の範囲)およびイリジウム量(x=0.12〜0.15)でA、BおよびCとラベル付けされた試料を調製した。Bi2O3およびIrの量を表2に示す。
本発明を特定の好ましい態様と共に記載した。本発明は、示され記載された構造、動作、正確な材料または態様の正確な詳細に限定されず、本明細書に開示された態様に対するさまざまな変更、等価物の置換、組成物の変更、およびその他の変更があることは当業者には明らかであろうことを理解されたい。
Claims (37)
- Ba、Co、FeおよびIrを含むフェライト組成物であって、当該フェライト組成物がZ型のヘキサフェライト相およびY型のヘキサフェライト相を含む、前記フェライト組成物。
- 式
Ba3Co(2+x)IrxFe(24−2x)O41
式中、x=0.05−0.20
で表される請求項1に記載のフェライト組成物。 - x=0.12〜0.15である、請求項2に記載のフェライト組成物。
- Z型のヘキサフェライト相が65vol%〜97.5vol%の範囲にあり、およびY型のヘキサフェライト相が2.5vol%〜35vol%の範囲にある、請求項1に記載のフェライト組成物。
- Z型のヘキサフェライト相が65vol%〜97.5vol%の範囲にあり、およびY型のヘキサフェライト相が残りを含む、請求項1に記載のフェライト組成物。
- さらにBi2O3を0.2〜5.0重量%の範囲で含む、請求項1に記載のフェライト組成物。
- Bi2O3がZ型のヘキサフェライト相とY型のヘキサフェライト相の粒界にある、請求項6に記載のフェライト組成物。
- フェライト組成物が約7から約8の範囲の実誘電率を有する、請求項1に記載のフェライト組成物。
- フェライト組成物が約7から約8の範囲の実透磁率を有する、請求項1に記載のフェライト組成物。
- フェライト組成物の実誘電率とフェライト組成物の実透磁率が10%以内で等しい、請求項1に記載のフェライト組成物。
- フェライト組成物が3%以内で自由空間のインピーダンスに一致する特性インピーダンスを有する、請求項1に記載のフェライト組成物。
- フェライト組成物が、0.65〜0.85GHzの周波数域に対して、0.05〜0.07の範囲にある誘電損失正接tanδεを有する、請求項1に記載のフェライト組成物。
- フェライト組成物が、0.65〜0.85GHzの周波数域に対して、0.07〜0.29の範囲にある磁気損失正接tanδμを有する、請求項1に記載のフェライト組成物。
- フェライト組成物が、周波数0.8GHzにおける誘電損率tanδε/ε’=0.008±20%を有する、請求項1に記載のフェライト組成物。
- フェライト組成物が、周波数0.8GHzにおける磁気損失率tanδμ/μ’=0.037±10%を有する、請求項1に記載のフェライト組成物。
- 請求項1に記載のフェライト組成物を含む部品。
- 部品がアンテナ、フィルタ、インダクタ、サーキュレータ、または位相シフタである、請求項16に記載の部品。
- 部品がマイクロ波アンテナである、請求項16に記載の部品。
- 部品が0.1GHz以上の周波数で動作可能のアンテナである、請求項18に記載の部品。
- 部品が0.3GHz以上の周波数で動作可能のアンテナである、請求項18に記載の部品。
- 部品が0.1〜1.5GHzで動作可能のアンテナである、請求項18に記載の部品。
- 部品が0.3〜1.0GHzで動作可能のアンテナである、請求項18に記載の部品。
- (a)Fe、Ba、Co、およびIrを含むヘキサフェライト相前駆体化合物を提供する工程と、
(b)ヘキサフェライト相前駆体化合物を空気中で焼成し、Z型のヘキサフェライト相およびY型のヘキサフェライト相を含む材料を形成する工程と
を含む、フェライト組成物の製造方法。 - ヘキサフェライト相前駆体化合物がFe、Ba、Co、およびIrの酸化物を含む、請求項23に記載の方法。
- ヘキサフェライト相前駆体化合物が、IrO2、BaCO3、Co3O4、およびFe2O3を含む、請求項23に記載の方法。
- ヘキサフェライト相前駆体化合物が、0.2〜2重量%のIrO2、20〜25重量%のBaCO3、5〜7重量%のCo3O4、および68〜74重量%のFe2O3を含む、請求項25に記載の方法。
- 工程(b)において、前駆体化合物が1000〜1200℃で、2〜10時間焼成される、請求項23に記載の方法。
- 工程(b)の後で、Bi2O3を添加する工程をさらに含む、請求項23に記載の方法。
- Bi2O3が0.2〜5.0重量%の範囲にある、請求項28に記載の方法。
- (c)工程(b)において形成された材料を粉砕して粉体混合物を形成する工程と、
(d)粉体混合物を焼結する工程と
をさらに含む、請求項23に記載の方法。 - 粉体混合物を1250〜1280℃で焼結する、請求項30に記載の方法。
- 粉体混合物を2〜10時間焼結する、請求項30に記載の方法。
- 粉体混合物を酸素雰囲気で焼結する、請求項30に記載の方法。
- 工程(d)の前に、粉体混合物を成形体に形成する工程をさらに含む、請求項30に記載の方法。
- 粉体混合物にバインダーを添加する工程をさらに含む、請求項30に記載の方法。
- バインダーがポリビニルアルコール、メチルセルロース、ポリエチレングリコール、およびポリ(アルキレンカーボナート)からなる群から選択される、請求項35に記載の方法。
- ポリビニルアルコールが8重量%〜12重量%の粉体混合物を含む、請求項36に記載の方法。
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KR20170040282A (ko) | 2017-04-12 |
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