Title:
【発明の名称】陰極線管のネック用ガラス
Document Type and Number:
Japanese Patent JP2002521300
Kind Code:
A
Abstract:
A cathode ray tube with an improved tubular glass neck member having a softening point in the range of 640-650° C., an annealing temperature in the range of 460-472° C., a strain point in the range of 420-425° C., a coefficient of thermal expansion in the range of 94-97x10-7/° C., and a linear x-ray absorption value of at least 100 cm-1 and a composition, as calculated in weight % on an oxide basis, consisting essentially of 46.5-49.5% SiO2, 1.5-2% Al2O3, 0.5-1.5% Na2O, 10-12% K2O, 2-3% SrO, 1-1.8% BaO, 32-34% PbO, 1-1.5% ZnO and a fining agent.
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Inventors:
Tamaro, David A
Application Number:
JP2000561636A
Publication Date:
July 16, 2002
Filing Date:
June 21, 1999
Export Citation:
Assignee:
Corning Incorporated
International Classes:
C03C3/105; C03C4/08; H01J29/86; (IPC1-7): C03C3/105; H01J29/86
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)