GB989800A - Process for electrolytically producing insulating oxide films on the surface of tantalum or niobium bodies - Google Patents

Process for electrolytically producing insulating oxide films on the surface of tantalum or niobium bodies

Info

Publication number
GB989800A
GB989800A GB2033063A GB2033063A GB989800A GB 989800 A GB989800 A GB 989800A GB 2033063 A GB2033063 A GB 2033063A GB 2033063 A GB2033063 A GB 2033063A GB 989800 A GB989800 A GB 989800A
Authority
GB
United Kingdom
Prior art keywords
tantalum
niobium
oxide films
glycol
insulating oxide
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.)
Expired
Application number
GB2033063A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB989800A publication Critical patent/GB989800A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/26—Anodisation of refractory metals or alloys based thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

An oxide film is formed on tantalum or niobium by anodization in a bath consisting of phosphoric acid in a glycol-water mixture, containing 25-90% by weight of glycol. The concentration of phosphoric acid is selected from the range 1.8-600 millimoles per kg. of glycol-water mixture to give an oxide coating at a forming voltage of 200 volts having low residual current and high sparking voltage. The oxide coated metal is used as an electrode in an electrolytic capacitor. Reference is made to a known process of anodizing tantalum or niobium in 10% phosphoric acid.
GB2033063A 1962-05-23 1963-05-22 Process for electrolytically producing insulating oxide films on the surface of tantalum or niobium bodies Expired GB989800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES79567A DE1178275B (en) 1962-05-23 1962-05-23 Process for forming tantalum or niobium bodies, especially for electrodes in electrolytic capacitors

Publications (1)

Publication Number Publication Date
GB989800A true GB989800A (en) 1965-04-22

Family

ID=7508281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2033063A Expired GB989800A (en) 1962-05-23 1963-05-22 Process for electrolytically producing insulating oxide films on the surface of tantalum or niobium bodies

Country Status (3)

Country Link
DE (1) DE1178275B (en)
GB (1) GB989800A (en)
NL (2) NL293102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899757A2 (en) * 1997-09-01 1999-03-03 Nec Corporation Fabrication method of solid electrolytic capacitor using organic conduction polymer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005192B (en) * 1953-05-11 1957-03-28 Gen Electric Electrolyte for electrolytic capacitors with tantalum electrodes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899757A2 (en) * 1997-09-01 1999-03-03 Nec Corporation Fabrication method of solid electrolytic capacitor using organic conduction polymer
EP0899757A3 (en) * 1997-09-01 2005-03-02 NEC TOKIN Toyama, Ltd. Fabrication method of solid electrolytic capacitor using organic conduction polymer

Also Published As

Publication number Publication date
NL293102A (en)
DE1178275B (en) 1964-09-17
NL136070C (en)

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