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Title: Electrode material for fluorescent lamps

Abstract

There is provided an emissive mixture for cathodes of fluorescent lamps comprising a ceramic material having a formula (A1-x Cax)6 (Ta1-y Wy)2 O11+y, where A is barium or a combination of barium and strontium, 0≦x<0.5, 0≦y<1, and one of x or y is greater than zero. The ratio of lamp efficacy to number of lamp starts may be improved by optimizing the amount of Ca and W present in the ceramic material.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
General Electric Co., Schenectady, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1531443
Patent Number(s):
6384534
Application Number:
09/466,009
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
DOE Contract Number:  
FC36-97GO10236
Resource Type:
Patent
Resource Relation:
Patent File Date: 1999-12-17
Country of Publication:
United States
Language:
English

Citation Formats

Srivastava, Alok Mani, Comanzo, Holly Ann, Bigio, Laurence, Beers, William Winder, Soules, Thomas Frederick, and Abasari, Emoke. Electrode material for fluorescent lamps. United States: N. p., 2002. Web.
Srivastava, Alok Mani, Comanzo, Holly Ann, Bigio, Laurence, Beers, William Winder, Soules, Thomas Frederick, & Abasari, Emoke. Electrode material for fluorescent lamps. United States.
Srivastava, Alok Mani, Comanzo, Holly Ann, Bigio, Laurence, Beers, William Winder, Soules, Thomas Frederick, and Abasari, Emoke. Tue . "Electrode material for fluorescent lamps". United States. https://www.osti.gov/servlets/purl/1531443.
@article{osti_1531443,
title = {Electrode material for fluorescent lamps},
author = {Srivastava, Alok Mani and Comanzo, Holly Ann and Bigio, Laurence and Beers, William Winder and Soules, Thomas Frederick and Abasari, Emoke},
abstractNote = {There is provided an emissive mixture for cathodes of fluorescent lamps comprising a ceramic material having a formula (A1-x Cax)6 (Ta1-y Wy)2 O11+y, where A is barium or a combination of barium and strontium, 0≦x<0.5, 0≦y<1, and one of x or y is greater than zero. The ratio of lamp efficacy to number of lamp starts may be improved by optimizing the amount of Ca and W present in the ceramic material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {5}
}

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Works referenced in this record:

Method for preparing electron emissive coatings
patent, April 1976


Cold cathode fluorescent discharge tube
patent, September 1997


Discharge lamp, particularly cold-start fluorescent lamp, and method of its manufacture
patent, March 1997


Discharge tube
patent, January 1994


Low-pressure discharge lamp having metal and ceramic electrodes
patent, August 1997


Emissive coating for electrodes
patent, June 1977


Electric discharge lamp having a cathode with cesium metal oxide
patent, June 1981


Method of treating electron emissive cathodes
patent, July 1976


Thermal Model of the Fluorescent Lamp Electrode
journal, July 1989


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    Composite electrode materials for electric lamps and methods of manufacture thereof
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    Electrode materials for electric lamps and methods of manufacture thereof
    patent, January 2010