EP1031638A1 - Aluminiumfolie mit hoher Reinheit für elektrolytische Kondensatoren - Google Patents

Aluminiumfolie mit hoher Reinheit für elektrolytische Kondensatoren Download PDF

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Publication number
EP1031638A1
EP1031638A1 EP00420034A EP00420034A EP1031638A1 EP 1031638 A1 EP1031638 A1 EP 1031638A1 EP 00420034 A EP00420034 A EP 00420034A EP 00420034 A EP00420034 A EP 00420034A EP 1031638 A1 EP1031638 A1 EP 1031638A1
Authority
EP
European Patent Office
Prior art keywords
ppm
elements
annealing
cold rolling
thickness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00420034A
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English (en)
French (fr)
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EP1031638B1 (de
Inventor
Jean-Rémi Butruille
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Constellium Issoire SAS
Original Assignee
Pechiney Rhenalu SAS
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Publication date
Application filed by Pechiney Rhenalu SAS filed Critical Pechiney Rhenalu SAS
Publication of EP1031638A1 publication Critical patent/EP1031638A1/de
Application granted granted Critical
Publication of EP1031638B1 publication Critical patent/EP1031638B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

Definitions

  • the invention relates to thin sheets or strips of refined aluminum, of purity greater than 99.9%, which, after having undergone a pitting surface treatment ("etching") intended to increase their specific surface, are used in manufacturing anode of electrolytic capacitors, especially high capacitors voltage.
  • etching pitting surface treatment
  • Patent EP 0490574 of Showa Aluminum published in 1992, describes the concentration, at various contents, elements Fe, Cu, Zn, Mn, Ga, P, V, Ti, Cr, Ni, Ta, Zr, C, Be, Pb and In, i.e. at the interface between the surface oxide layer of the sheet and the body of the leaf, either in the oxide layer.
  • concentration ratio of elements between the concentration zone and the core of the sheet, measured with the probe ionic, is between 1.2 and 30.
  • the object of the invention is to improve the beneficial effect of the surface concentration of elements Pb, B and In on the puncture ability of thin aluminum sheets refined aluminum for electrolytic capacitors. It is based on the implementation evidence of the favorable effect of a homogeneous distribution of these 3 elements at the leaf area.
  • FIG. 1 represents an example of an intensity profile obtained by ionic analysis for an element, on a logarithmic scale, as a function of the advance distance (in ⁇ m) perpendicular to the rolling direction of the sheet, and the determination maximum, minimum and average intensities required to calculate the ratio of dispersion.
  • Figures 2a and 2b are micrographs illustrating the distribution of the bites after etching resulting respectively from a heterogeneous and homogeneous distribution of elements Pb, B and In on the surface of the sheet.
  • the thin aluminum sheets used to manufacture the electrodes of electrolytic capacitors are obtained from refined aluminum of purity at less equal to 99.9%.
  • the refining process used can be either a refining "3-layer" electrolytic, as described in patents FR 759588 and FR 832528, or a method by segregation as described in patent FR 1594154.
  • the metal is then hot rolled, then cold rolled to the final thickness, which is around 0.1 mm.
  • the dispersion ratio Rd (I max - I min ) / I avg is less than 5, and preferably 2, for each of the elements Pb, B and In.
  • the intensities are measured using an ion analyzer of the SIMS (Secondary Ion Mass Spectrometry) type, by the so-called "step-scan" method.
  • the advance step is 10 ⁇ m and the abraded area is a square of 250 ⁇ m side.
  • the average signal intensity I avg for an element is obtained by calculating the arithmetic mean of the intensities measured on the profile.
  • the upper limit intensity I max is the arithmetic mean of the maximum intensities obtained in the following manner: they are defined by the intensity at the second point of three consecutive analysis points having a maximum intensity on the second point. Only the maxima exceeding a threshold fixed slightly above the average intensity are retained.
  • the lower limit intensity I min is the arithmetic mean of the intensities obtained when a minimum is observed on the second point of three successive analysis points, retaining only the intensities exceeding a certain threshold located slightly below of average intensity.
  • This method is illustrated by the diagram in Figure 1, representing the profile intensity as a function of the distance traveled by the ion analyzer on the sample.
  • the measurement points are represented by a small circle, and the points retained as minimum and maximum intensities are those surrounded by a square, which are located outside the band delimited by the two threshold lines.
  • the abrasion conditions are stable after 125 ⁇ m of displacement.
  • the first 125 microns of each lateral profile are therefore systematically ignored.
  • the analysis depth is less than 0.1 ⁇ m.
  • the measurements are carried out on several locations to obtain values reliable statistics.
  • the average intensities were measured on each sample, maximum and minimum for each of the elements according to the method described above, and calculated the dispersion ratio Rd in each case.
  • the capacity of the capacitors produced was then measured from the pitted samples according to the following method: the aluminum sheets are electrolysed in a solution containing 5% HCl and 15% H 2 SO 4 with a direct current density of 200 mA / cm 2 for 60 s at 85 ° C. The leaves are then immersed in a 5% HCl solution for 8 min. The oxide is formed at a voltage of 450 V in a solution of ammonium borate. The capacity is measured in ⁇ F / cm 2 , but then reduced as a percentage relative to a refined reference sheet. The results obtained are collated in Table 1. Ech. Pb (ppm) B (ppm) In (ppm) Rd Pb Rd B Rd In Cap.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metal Rolling (AREA)
  • ing And Chemical Polishing (AREA)
EP00420034A 1999-02-23 2000-02-17 Aluminiumfolie mit hoher Reinheit für elektrolytische Kondensatoren Expired - Lifetime EP1031638B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9902386A FR2790008B1 (fr) 1999-02-23 1999-02-23 Feuille en alluminium raffine pour condensateurs electrolytiques
FR9902386 1999-02-23

Publications (2)

Publication Number Publication Date
EP1031638A1 true EP1031638A1 (de) 2000-08-30
EP1031638B1 EP1031638B1 (de) 2004-04-07

Family

ID=9542554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00420034A Expired - Lifetime EP1031638B1 (de) 1999-02-23 2000-02-17 Aluminiumfolie mit hoher Reinheit für elektrolytische Kondensatoren

Country Status (9)

Country Link
US (1) US6471793B1 (de)
EP (1) EP1031638B1 (de)
JP (1) JP2000252170A (de)
KR (1) KR100696971B1 (de)
CN (1) CN1201350C (de)
DE (1) DE60009591T2 (de)
FR (1) FR2790008B1 (de)
RU (1) RU2231847C2 (de)
TW (1) TWI233452B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2415192C2 (ru) * 2007-04-20 2011-03-27 Петр Трофимович Обыденный Алюминиевый сплав повышенной электрической проводимости

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2844810B1 (fr) * 2002-09-24 2004-11-05 Pechiney Rhenalu Feuille ou bande en aluminium raffine pour condensateurs electrolytiques
JP2007046093A (ja) * 2005-08-09 2007-02-22 Mitsubishi Alum Co Ltd 電解コンデンサ電極用アルミニウム箔およびその製造方法
JP5104525B2 (ja) * 2008-05-01 2012-12-19 日本軽金属株式会社 電解コンデンサ用アルミニウム箔
RU2748842C1 (ru) * 2020-06-01 2021-05-31 Виктор Валентинович Стрелков Алюминиевая конденсаторная исходная фольга, легированная эрбием

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498765A (en) * 1966-09-06 1970-03-03 Aluminum Co Of America Capacitor foil composed of alloys of aluminum and cadmium or indium
JPH0462818A (ja) * 1990-06-25 1992-02-27 Showa Alum Corp 電解コンデンサ電極用アルミニウム箔
EP0490574A1 (de) * 1990-12-11 1992-06-17 Showa Aluminum Kabushiki Kaisha Aluminiumfolie wie Elektroden von elektrolytischen Kondensator
JPH05287465A (ja) * 1992-04-15 1993-11-02 Mitsubishi Alum Co Ltd 電解コンデンサ用アルミニウム箔の製造方法
JPH06330213A (ja) * 1993-05-20 1994-11-29 Mitsubishi Alum Co Ltd 表面積拡大効果のすぐれた電解コンデンサの電極用アルミニウム箔材
JPH07150280A (ja) * 1993-12-01 1995-06-13 Nippon Foil Mfg Co Ltd 電解コンデンサ電極用アルミニウム合金箔
JPH083673A (ja) * 1994-06-15 1996-01-09 Mitsubishi Alum Co Ltd 電解コンデンサ用アルミニウム箔および該アルミニウム箔の製造方法
JPH10140394A (ja) * 1996-11-05 1998-05-26 Kobe Steel Ltd 電解コンデンサ用アルミニウム箔

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047896B2 (ja) * 1981-09-08 1985-10-24 東洋アルミニウム株式会社 電解コンデンサ用アルミニウム箔
JP2627456B2 (ja) * 1990-03-08 1997-07-09 住友軽金属工業 株式会社 電解コンデンサ用アルミニウム箔
US5518823A (en) 1990-12-11 1996-05-21 Showa Aluminum Kabushiki Aluminum foil as electrolytic condenser electrodes
RU2098878C1 (ru) * 1996-04-03 1997-12-10 Закрытое акционерное общество "Росс ЛТД" Способ изготовления катодной фольги (варианты) и катодная фольга электролитического конденсатора
RU2123738C1 (ru) * 1997-03-21 1998-12-20 Воронежский государственный технический университет Пористое покрытие для модификации поверхности фольги электролитического конденсатора

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498765A (en) * 1966-09-06 1970-03-03 Aluminum Co Of America Capacitor foil composed of alloys of aluminum and cadmium or indium
JPH0462818A (ja) * 1990-06-25 1992-02-27 Showa Alum Corp 電解コンデンサ電極用アルミニウム箔
EP0490574A1 (de) * 1990-12-11 1992-06-17 Showa Aluminum Kabushiki Kaisha Aluminiumfolie wie Elektroden von elektrolytischen Kondensator
JPH05287465A (ja) * 1992-04-15 1993-11-02 Mitsubishi Alum Co Ltd 電解コンデンサ用アルミニウム箔の製造方法
JPH06330213A (ja) * 1993-05-20 1994-11-29 Mitsubishi Alum Co Ltd 表面積拡大効果のすぐれた電解コンデンサの電極用アルミニウム箔材
JPH07150280A (ja) * 1993-12-01 1995-06-13 Nippon Foil Mfg Co Ltd 電解コンデンサ電極用アルミニウム合金箔
JPH083673A (ja) * 1994-06-15 1996-01-09 Mitsubishi Alum Co Ltd 電解コンデンサ用アルミニウム箔および該アルミニウム箔の製造方法
JPH10140394A (ja) * 1996-11-05 1998-05-26 Kobe Steel Ltd 電解コンデンサ用アルミニウム箔

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 267 (E - 1217) 16 June 1992 (1992-06-16) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 082 (C - 1164) 10 February 1994 (1994-02-10) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 02 31 March 1995 (1995-03-31) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2415192C2 (ru) * 2007-04-20 2011-03-27 Петр Трофимович Обыденный Алюминиевый сплав повышенной электрической проводимости

Also Published As

Publication number Publication date
CN1264906A (zh) 2000-08-30
TWI233452B (en) 2005-06-01
JP2000252170A (ja) 2000-09-14
KR20000058136A (ko) 2000-09-25
US6471793B1 (en) 2002-10-29
HK1028924A1 (en) 2001-03-09
EP1031638B1 (de) 2004-04-07
KR100696971B1 (ko) 2007-03-21
DE60009591D1 (de) 2004-05-13
FR2790008A1 (fr) 2000-08-25
CN1201350C (zh) 2005-05-11
DE60009591T2 (de) 2005-04-21
FR2790008B1 (fr) 2001-04-13
RU2231847C2 (ru) 2004-06-27

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