JP2005035885A - 亜酸化ニオブ粉末、亜酸化ニオブアノード、および固体電解キャパシタ - Google Patents
亜酸化ニオブ粉末、亜酸化ニオブアノード、および固体電解キャパシタ Download PDFInfo
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Abstract
【解決手段】亜酸化ニオブをマグネシウム、タングステンおよび/またはモリブデンでドーピングすることによって達成された。
【選択図】なし
Description
C=(F・ε)/(d・VF)
[式中、Fはキャパシタ表面積を示し、εは誘電率、dは化成電圧Vに対する絶縁層の厚さを示し、かつVFは化成電圧を示す]。五酸化タンタルまたは五酸化ニオブに対する誘電率εは、それぞれ、27.6または41であるけれども、化成電圧1ボルトに対する層厚の成長dは、16.6または25Å/Vであり、双方の五酸化物は、それぞれ同様の比ε/d=1.64または1.69である。双方の五酸化物に基づくキャパシタは、アノード構造の同様のジオメトリーを有しており、同様の静電容量を有する。詳細には、比重量に関連する静電容量に関する相違は、Nb、NbOxおよびTaの異なる密度から生じるものであることは自明である。したがって、NbおよびNbOxから製造されたアノード構造は、たとえば、自動車電話に使用する場合には、重量を軽減させるといった利点を有し、その際、重量軽減は何gであっても重要である。コストの点において、NbOxはNbよりも有利であり、それというのも、アノード構造の体積のいくらかは、酸素によるものであるからである。
粉体を、プレス金型に挿入されたニオブワイヤまたはタンタルワイヤ周囲に、2.3〜3.5g/cm3のプレス密度にプレスし、粉体プレフォームを形成した。極めて有利なプレス強度を有するプレス成形体が得られた。たとえば、標準的な測定は、直径5.2mmおよび高さ5.1mmを有する円筒状のプレス成形体(ワイヤは含まない)上で、亜酸化ニオブ粉末 301gの計量された量(weight-in quantity)を用いておこない、2.8g/cm3の密度にプレスした後に、0.5〜1kgの加重量下で安定であった。
焼結されたアノード構造は、0.1質量%濃度のH3PO4を含有する水性電解質中で、85℃で、かつ30Vまでの化成電圧の150mA/gの化成電流で、かつ、120分に亘っての最終化成時間(ほぼ電流不含)で形成された。
出発材料は、水酸化ニオブのか焼によって製造される五酸化ニオブであり、この場合、この水酸化ニオブは、H2NbF7溶液からの沈殿によって、水性アンモニア溶液を用いて得られる。化学分析は以下の通りである:
Claims (5)
- マグネシウムを100〜600ppm含有する亜酸化ニオブ粉末。
- モリブデンおよび/またはタングステンを50〜400ppm含有する亜酸化ニオブ粉末。
- マグネシウムを100〜600ppmおよびモリブデンおよび/またはタングステンを50〜400ppm含有する亜酸化ニオブ粉末。
- 請求項1から3までのいずれか1項に記載の焼結された粉末から成る、亜酸化ニオブアノード。
- 請求項4に記載の亜酸化ニオブアノードおよび五酸化ニオブ障壁層を含む、固体電解キャパシタ。
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DE10331891 | 2003-07-15 |
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JP2008329535A Division JP5546124B2 (ja) | 2003-07-15 | 2008-12-25 | キャパシタ製造用の亜酸化ニオブ粉末、キャパシタ用の亜酸化ニオブアノード、および固体電解キャパシタ |
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JP2005035885A true JP2005035885A (ja) | 2005-02-10 |
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JP2008329535A Active JP5546124B2 (ja) | 2003-07-15 | 2008-12-25 | キャパシタ製造用の亜酸化ニオブ粉末、キャパシタ用の亜酸化ニオブアノード、および固体電解キャパシタ |
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US (2) | US7381396B2 (ja) |
EP (1) | EP1498391B1 (ja) |
JP (2) | JP2005035885A (ja) |
KR (1) | KR20050008488A (ja) |
CN (2) | CN101407338A (ja) |
AU (1) | AU2004203145B2 (ja) |
BR (1) | BRPI0402765B1 (ja) |
DE (1) | DE502004011120D1 (ja) |
MX (1) | MXPA04006812A (ja) |
PT (1) | PT1498391E (ja) |
RU (1) | RU2369563C2 (ja) |
TW (1) | TWI367262B (ja) |
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-
2004
- 2004-07-02 DE DE502004011120T patent/DE502004011120D1/de active Active
- 2004-07-02 EP EP04015657A patent/EP1498391B1/de active Active
- 2004-07-02 PT PT04015657T patent/PT1498391E/pt unknown
- 2004-07-13 US US10/889,719 patent/US7381396B2/en active Active
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- 2004-07-13 BR BRPI0402765-5B1A patent/BRPI0402765B1/pt active IP Right Grant
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Cited By (10)
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US8533708B2 (en) | 2001-12-28 | 2013-09-10 | Access Co., Ltd. | Usage period management system for applications |
JP2006206428A (ja) * | 2004-12-27 | 2006-08-10 | Mitsui Mining & Smelting Co Ltd | ニオブ酸化物及びその製造方法 |
JP2008542174A (ja) * | 2005-06-03 | 2008-11-27 | ハー.ツェー.スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | 無機化合物 |
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JP2008153585A (ja) * | 2006-12-20 | 2008-07-03 | Sanyo Electric Co Ltd | 固体電解コンデンサ |
JP2010533642A (ja) * | 2007-07-18 | 2010-10-28 | キャボット コーポレイション | 高電圧ニオブ酸化物およびそれを含むキャパシター |
JP2011524629A (ja) * | 2008-06-02 | 2011-09-01 | ハー.ツェー.スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | 漏えい電流の少ない電解キャパシタを製造するための方法 |
JP2012513105A (ja) * | 2008-12-19 | 2012-06-07 | ハー.ツェー.スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | コンデンサ陽極 |
US8747488B2 (en) | 2008-12-19 | 2014-06-10 | H. C. Starck Gmbh | Capacitor anode |
JP2017103182A (ja) * | 2015-12-04 | 2017-06-08 | トヨタ自動車株式会社 | 活物質複合体の製造方法 |
Also Published As
Publication number | Publication date |
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RU2004121476A (ru) | 2006-01-10 |
US7381396B2 (en) | 2008-06-03 |
TW200517506A (en) | 2005-06-01 |
EP1498391B1 (de) | 2010-05-05 |
JP2009120478A (ja) | 2009-06-04 |
US20080291605A1 (en) | 2008-11-27 |
TWI367262B (en) | 2012-07-01 |
KR20050008488A (ko) | 2005-01-21 |
AU2004203145B2 (en) | 2009-10-01 |
CN1576235A (zh) | 2005-02-09 |
US7618610B2 (en) | 2009-11-17 |
RU2369563C2 (ru) | 2009-10-10 |
EP1498391A1 (de) | 2005-01-19 |
JP5546124B2 (ja) | 2014-07-09 |
BRPI0402765A (pt) | 2005-05-31 |
BRPI0402765B1 (pt) | 2013-07-23 |
ZA200405532B (en) | 2005-09-28 |
DE502004011120D1 (de) | 2010-06-17 |
MXPA04006812A (es) | 2005-04-19 |
AU2004203145A1 (en) | 2005-02-03 |
PT1498391E (pt) | 2010-06-21 |
US20050013765A1 (en) | 2005-01-20 |
CN101407338A (zh) | 2009-04-15 |
CN100441515C (zh) | 2008-12-10 |
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RD04 | Notification of resignation of power of attorney |
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