GB820187A - Oxide-coated cathode and method of producing same - Google Patents

Oxide-coated cathode and method of producing same

Info

Publication number
GB820187A
GB820187A GB13098/57A GB1309857A GB820187A GB 820187 A GB820187 A GB 820187A GB 13098/57 A GB13098/57 A GB 13098/57A GB 1309857 A GB1309857 A GB 1309857A GB 820187 A GB820187 A GB 820187A
Authority
GB
United Kingdom
Prior art keywords
oxide
solution
april
alkaline
heated
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
GB13098/57A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB820187A publication Critical patent/GB820187A/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
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

820,187. Cathode materials and processing. EGYESULT IZZOLAMPA ES VILLAMOSSAGI R. T. April 24, 1957 [April 26, 1956], No. 13098/57. Class 39(1). In the manufacture of an oxide-coated cathode, a mixture of alkaline-earth metal carbonates is impregnated with a solution of a substance capable of forming a basic alkalineearth metal compound when heated with an alkaline-earth metal oxide. The basic compounds may be zirconates, titanates, aluminates, silicates, or berylliates. Two examples are given. (1) A double or triple solid solution of barium, strontium, or calcium carbonates is soaked with zirconium nitrate solution, dried, and then heated in two stages, to not more than 600‹C., and then to 1300‹-1400‹C. (2) A similar method in which the impregnating substance is a colloidal solution of zirconium hydroxide. It is stated that this method of manufacture is effective in reducing the evaporation of barium oxide.
GB13098/57A 1956-04-26 1957-04-24 Oxide-coated cathode and method of producing same Expired GB820187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU820187X 1956-04-26

Publications (1)

Publication Number Publication Date
GB820187A true GB820187A (en) 1959-09-16

Family

ID=10980481

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13098/57A Expired GB820187A (en) 1956-04-26 1957-04-24 Oxide-coated cathode and method of producing same

Country Status (2)

Country Link
DE (1) DE1084841B (en)
GB (1) GB820187A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0720196A1 (en) * 1994-12-28 1996-07-03 Samsung Display Devices Co., Ltd. Thermion emitting oxide cathode and method for making the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0720196A1 (en) * 1994-12-28 1996-07-03 Samsung Display Devices Co., Ltd. Thermion emitting oxide cathode and method for making the same
US5684357A (en) * 1994-12-28 1997-11-04 Samsung Display Devices Co., Ltd. Thermion emitting oxide cathode and method for making the same

Also Published As

Publication number Publication date
DE1084841B (en) 1960-07-07

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