JP2011236122A - 電力伝達系のための誘電材料 - Google Patents
電力伝達系のための誘電材料 Download PDFInfo
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- JP2011236122A JP2011236122A JP2011103930A JP2011103930A JP2011236122A JP 2011236122 A JP2011236122 A JP 2011236122A JP 2011103930 A JP2011103930 A JP 2011103930A JP 2011103930 A JP2011103930 A JP 2011103930A JP 2011236122 A JP2011236122 A JP 2011236122A
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Abstract
【解決手段】この電力伝達系は誘電材料を含む場集束素子を含む。誘電材料は(Ba,Sr)TiO3又はCaCu3Ti4O12の群から選択される組成物を含む。(Ba,Sr)TiO3の組成物には、Ca1−x−yBaxSryTi1−zCrzO3−δNpのような材料が包含され、ここで0<x<1、0<y<1、0≦z≦0.01、0≦δ≦1、0≦p≦1である。CaCu3Ti4O12の組成物には、Ca1−x−yBaxSry(Ca1−zCuz)Cu2Ti4−δAlδO12−0.5δのような材料が包含され、ここで0≦x<0.5、0≦y<0.5、0≦z≦1、0≦d≦0.1である。
【選択図】 図1
Description
瞬時又は連続的なエネルギー伝達が必要とされるが相互に接続する線は不都合であるようなある種の用途では、非接触式電力伝達(contactless power transfer)が望ましい。1つの非接触式電力伝達法は、主要な(dominant)磁場を発生する一次変換器コイル及び一次変換器コイルの近傍で対応する電圧を二次変換器コイルの原理に基づいて作動する電磁誘導法である。二次変換器コイルが受ける磁場は2つのコイル間の距離の二乗の関数として減少し、従って数ミリメートルを超える距離では一次コイルと二次コイルのカップリングは弱い。
いろいろな実施例で特定されるBST及びCCT材料系に対して採られた一般的な調製方法の概要を以下に示す。しかし、当業者には理解されるように、以下に示す実施例で、出発材料の小さい変動、調製、カ焼、及び焼結の温度、時間、及び雰囲気、調製された粉末及びバルク材の大きさ及び形状の変動が許され得る。
化学量論的濃度のCaCO3、CuO及びTiO2を混合し、乾燥条件でボールミル粉砕し、1000℃で24時間空気中でカ焼した。カ焼温度と雰囲気を幾つかの材料について変化させて温度と雰囲気の影響を検討した。所要によりバリウム、ストロンチウム、クロム、アルミニウム、ランタン、鉄、及びジルコニウムドーパントをドープするためにそれぞれBaCO3、SrCO3、Cr2O3、Al2O3、La2O3、Fe2O3、ZrO2を固体状態混合により所要のモルパーセントで加えた。粒界のドープのために約1モル%のBi2O3.3TiO2を加えた。尿素を用いて固体状態混合とカ焼により酸素部位に窒素をドープした。酸素部位にフッ素ドーパントを含ませるための出発材料として化学量論的量のBaF2、SrF2、及び/又はCaF2を使用した。
約13.071gmのBaCO3、9.579gmのTiO2、10.152gmのSr(NO3)2及び0.6gmのCaCO3を一緒に加え、乳鉢と乳棒を用いて15分手練りした。この混合物に、ほぼ等しい体積のイソプロパノールと体積で約3倍のジルコニア粉砕媒体を加え、およそ6時間ラックミル粉砕した。この均一な混合物をアルミナるつぼに移し、1100℃で2時間カ焼した。このカ焼した粉末に約2wt%のPVAを加え、瑪瑙乳鉢を用いて混合した。等体積のイソプロパノールを加え、得られた材料を再びラックミル粉砕した。
約0.079gmのBaCO3、12.790gmのTiO2、1.175gmのSrCO3、3.165gmのCaCO3及び9.554gmのCuOを一緒に加え、乳鉢と乳棒を用いて15分手練りした。この混合物に、ほぼ等体積のイソプロパノールと体積で約3倍のジルコニア粉砕媒体を加え、およそ6時間ラックミル粉砕した。この均一な混合物をアルミナるつぼに移し、1000℃で24時間カ焼した。このカ焼した粉末に、約2wt%のPVAを加え、瑪瑙乳鉢を用いて混合した。得られた材料に等体積のイソプロパノールを加え、再びラックミル粉砕した。
約8.497 CaCO3、6.753gmのCuO、13.357gmのTiO2及び0.955gmのAl(NO3)3.9H2Oを一緒に加え、乳鉢と乳棒を用いて15分手練りした。この混合物に、ほぼ等体積のイソプロパノール及び約3倍ののジルコニア粉砕媒体を加え、およそ6時間ラックミル粉砕した。この均一な混合物をアルミナるつぼに移し、1000℃で24時間カ焼した。このカ焼した粉末に、約2wt%のPVAを加え、瑪瑙乳鉢を用いて混合した。得られた材料に、等体積のイソプロパノールを加え、再びラックミル粉砕した。
12−第1コイル
14−電源
16−第2コイル
18−場集束素子
20−負荷
22−場集束素子の1つの開放端
24−場集束素子のもう1つの開放端
25−場集束素子の長さ
30−オメガ場集束構造体
32、34、36−オメガ構造体におけるターンの番号
38−ターン間の間隙
40−渦巻の幅
50−単一のループコイル
52−分割リング構造体
54−渦巻構造体
56−スイスロール構造体
58−螺旋コイル
64−共鳴器のアレイ
66、67、68、69−共鳴器の列
70、71、72、73、74−列内に配列された個々の共鳴器
75、77、79−個々の共鳴器
76、78−共鳴器間の変位
Claims (10)
- 誘電材料を含む場集束素子18を含んでなる電力伝達系10であって、誘電材料がCa1−x−yBaxSryTi1−zCrzO3−δNpを含んでなり、ここで0<x<1、0<y<1、0≦z≦0.01、0≦δ≦1、0≦p≦1である、前記系10。
- 誘電材料が結晶粒子及び結晶粒界を含む多結晶性材料であり、誘電材料がさらに結晶粒界に配置されたビスマスを含む相を含む、請求項1記載の系10。
- 前記相が金属のビスマスを含む、請求項2記載の系10。
- 誘電材料がBa0.3Sr0.7Cr0.002Ti0.998O3からなる、請求項1記載の系10。
- z>0であり、δ及びpがいずれも0に等しい、請求項1記載の系10。
- z=0であり、δ及びpがいずれも0より大きい、請求項1記載の系10。
- z、δ、及びpが全てゼロより大きい、請求項1記載の系10。
- 誘電材料がBa0.3Sr0.7Cr0.005Ti0.995O2.8N0.13からなる、請求項1記載の系10。
- 誘電材料がさらに約1原子パーセント未満の量でフッ素を含む、請求項1記載の系10。
- 電源14に連結された第1コイル12、
負荷20に連結された第2コイル16、及び
第1コイル12と第2コイル16の間に配置され、誘電材料を含む場集束素子18
を含んでなる電力伝達系10であって、誘電材料がCa1−x−yBaxSryTi1−zCrzO3−δNpを含んでなり、ここで0<x<1、0<y<1、0≦z≦0.01、0≦δ≦0.5、0≦p≦0.5である、前記系10。
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