GB1044759A - Improvements in or relating to photocathodes - Google Patents

Improvements in or relating to photocathodes

Info

Publication number
GB1044759A
GB1044759A GB3706364A GB3706364A GB1044759A GB 1044759 A GB1044759 A GB 1044759A GB 3706364 A GB3706364 A GB 3706364A GB 3706364 A GB3706364 A GB 3706364A GB 1044759 A GB1044759 A GB 1044759A
Authority
GB
United Kingdom
Prior art keywords
silver
reduction
substrate
photocathodes
oxidation
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
GB3706364A
Inventor
John Leslie Phillips
Judah Louis Hirsch
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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
Priority to DENDAT1251883D priority Critical patent/DE1251883B/de
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to GB3706364A priority patent/GB1044759A/en
Priority to CH1243365A priority patent/CH463639A/en
Priority to FR31009A priority patent/FR1447578A/en
Publication of GB1044759A publication Critical patent/GB1044759A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
    • 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
    • C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

In a method of manufacturing silver-oxide-alkali metal photocathodes, a silver substrate is subjected to cycles of electrolytic oxidation and reduction to increase the surface area of the silver substrate. In particular, a semi-cylindrical silver cathode, or a silver layer on a glass base, after cleaning in a solvent, then HNO3, and treating with hydrogen at 650 DEG C, is immersed in an electrolytic bath of potassium hydroxide solution together with a silver wire electrode. The C.D. is adjusted to 1 mA per sq. cm., and alternate oxidation and reduction is effected every 10 mins by reversing the polarity of the current through the electrolyzing circuit, Fig. 1 (not shown). The cycle is repeated 12 times, and then coating is then washed and dried.
GB3706364A 1964-09-10 1964-09-10 Improvements in or relating to photocathodes Expired GB1044759A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DENDAT1251883D DE1251883B (en) 1964-09-10
GB3706364A GB1044759A (en) 1964-09-10 1964-09-10 Improvements in or relating to photocathodes
CH1243365A CH463639A (en) 1964-09-10 1965-09-07 Method of manufacturing a photocathode
FR31009A FR1447578A (en) 1964-09-10 1965-09-10 Process for manufacturing a photosensitive cathode consisting of silver, oxygen and an alkali metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3706364A GB1044759A (en) 1964-09-10 1964-09-10 Improvements in or relating to photocathodes

Publications (1)

Publication Number Publication Date
GB1044759A true GB1044759A (en) 1966-10-05

Family

ID=10393454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3706364A Expired GB1044759A (en) 1964-09-10 1964-09-10 Improvements in or relating to photocathodes

Country Status (2)

Country Link
DE (1) DE1251883B (en)
GB (1) GB1044759A (en)

Also Published As

Publication number Publication date
DE1251883B (en)

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