GB740456A - Activating material for electrodes in electric discharge devices - Google Patents

Activating material for electrodes in electric discharge devices

Info

Publication number
GB740456A
GB740456A GB26637/52A GB2663752A GB740456A GB 740456 A GB740456 A GB 740456A GB 26637/52 A GB26637/52 A GB 26637/52A GB 2663752 A GB2663752 A GB 2663752A GB 740456 A GB740456 A GB 740456A
Authority
GB
United Kingdom
Prior art keywords
cerate
cathode
barium
hydrogen
electrodes
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
GB26637/52A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of GB740456A publication Critical patent/GB740456A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H01J17/066—Cold cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems
    • H01J2893/0066—Construction, material, support, protection and temperature regulation of electrodes; Electrode cups

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)
  • Vibration Dampers (AREA)

Abstract

740,456. Cathode materials and processing. PATENT-TREUHAND-GES. FUR ELEKTRISCHE GLUHLAMPEN. Oct. 23, 1952 [Nov. 1, 1951], No. 26637/52. Class 39 (1). A cathode material consists of a partly reduced mixture of one mol. of alkaline earth oxide and one mol. of a cerium oxide. Barium cerate of perowskite form, preferably mixed with 1-10 per cent, e.g. 3 per cent, of a reducing alloy containing equal parts of aluminium and barium is heated in hydrogen. The cerate may be produced by heating barium carbonate and cerium oxide for half an hour at 1400‹ C. and the product is fired in hydrogen at 1000‹ C. The oxygen atom in the cerate may be partly replaced by fluorine; the cerate may be fired in hydrogen at 1350-1400‹ C. with a proportion which is in the range of one hundredth and one of cerium oxide and barium fluoride or of barium carbonate and cerium flouride to give a perowskite structure. The electron-emitting paste for a cold or thermionic cathode is produced by suspending the ground material in alcohol, acetone butylacetate to coat tungsten coils or it may be shaped into rods. A low-pressure lamp having an internal coating of fluorescent material, e.g. magnesium tungstate or zinc beryllium silicate is provided with hollow cylindrical electrodes of sheet iron or molybdenum or nickel coated internally with the emulsion or filled with compressed powder or a sintered pill of the material. The filling consists of argon and mercury at 4-8 microns. Dimension of the electrodes, current rating and cathode drop are specified. The cathode material 12, Fig. 3, may be fitted into a groovo of a cap 11 and held by a member 13.
GB26637/52A 1951-11-01 1952-10-23 Activating material for electrodes in electric discharge devices Expired GB740456A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE314128X 1951-11-01
DE111052X 1952-10-11

Publications (1)

Publication Number Publication Date
GB740456A true GB740456A (en) 1955-11-16

Family

ID=25750583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26637/52A Expired GB740456A (en) 1951-11-01 1952-10-23 Activating material for electrodes in electric discharge devices

Country Status (7)

Country Link
US (1) US2911376A (en)
BE (1) BE515205A (en)
CH (2) CH111052A (en)
DE (1) DE944621C (en)
FR (1) FR1065061A (en)
GB (1) GB740456A (en)
NL (2) NL173358B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010742A1 (en) * 1978-11-06 1980-05-14 Westinghouse Electric Corporation H.I.D. lamp electrode comprising barium-calcium niobate or tantalate

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980617A (en) * 1956-03-13 1961-04-18 Indiana General Corp Ferrite compositions and method of making same
DE1157411B (en) * 1959-10-22 1963-11-14 Leybolds Nachfolger E Air-resistant glow cathode for ionization manometer tubes
US4158153A (en) * 1978-01-23 1979-06-12 Eckberg Edwin E Low voltage fluorescent lamp having a plurality of cathode means
US5744905A (en) * 1994-12-23 1998-04-28 Philips Electronics North America Corporation Emission materials for discharge lamps and method for manufacturing electrode structures with such materials
US6037714A (en) * 1995-09-19 2000-03-14 Philips Electronics North America Corporation Hollow electrodes for low pressure discharge lamps, particularly narrow diameter fluorescent and neon lamps and lamps containing the same
US5982097A (en) * 1995-12-29 1999-11-09 Philips Electronics North America Corporation Hollow electrodes for low pressure discharge lamps, particularly narrow diameter fluorescent and neon lamps and lamps containing the same
US5905339A (en) * 1995-12-29 1999-05-18 Philips Electronics North America Corporation Gas discharge lamp having an electrode with a low heat capacity tip
KR100445908B1 (en) * 2001-12-26 2004-08-25 한국전자통신연구원 Blue phosphor for fluorescent display and method for synthesizing the same
WO2008151670A1 (en) * 2007-06-14 2008-12-18 Osram Gesellschaft mit beschränkter Haftung Method for producing an electrically conductive hollow body for lamp construction and associated lamp

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147447A (en) * 1936-09-21 1939-02-14 Siemens Ag Glow cathode
US2249672A (en) * 1936-12-10 1941-07-15 Gen Electric Discharge device
DE858738C (en) * 1941-03-24 1952-12-08 Telefunken Gmbh Powdery, non-evaporating trapping material for electrical discharge vessels
DE875695C (en) * 1945-02-03 1953-05-04 Lorenz C Ag Mixing getter for high vacuum technology
US2447038A (en) * 1945-10-31 1948-08-17 Raytheon Mfg Co Cathode structure
US2477279A (en) * 1946-09-11 1949-07-26 Hanovia Chemical & Mfg Co Electrical discharge device
US2661336A (en) * 1948-11-17 1953-12-01 Rca Corp Getter material for electron discharge devices
US2586768A (en) * 1949-02-24 1952-02-26 Driver Harris Co Vacuum tube electrode element
US2663816A (en) * 1949-09-28 1953-12-22 Sylvania Electric Prod Electric discharge lamp
DE823909C (en) * 1950-05-28 1951-12-06 Hoerner Fa Eugen Electrode for discharge tubes
CH301568A (en) * 1951-09-06 1954-09-15 Izzolampa Egysult Getter material and process for its production.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010742A1 (en) * 1978-11-06 1980-05-14 Westinghouse Electric Corporation H.I.D. lamp electrode comprising barium-calcium niobate or tantalate

Also Published As

Publication number Publication date
DE944621C (en) 1956-06-28
US2911376A (en) 1959-11-03
NL91686C (en)
NL173358B (en)
BE515205A (en)
FR1065061A (en) 1954-05-20
CH111052A (en) 1925-07-16
CH314128A (en) 1956-05-31

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