Lead-free glasses of high x-ray absorption for cathode ray tubes

Details Lead-free glasses of high x-ray absorption for cathode ray tubes Lead-free glasses of high x-ray absorption for cathode ray tubes

1980-02-19

1981-07-07

Carter, Herbert T.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

252478, 313450, C03C 310, C03C 324

Patent

active

042772869

ABSTRACT:
This invention is directed to glasses especially suitable for use as television picture tube faceplates which exhibit linear X-ray absorption coefficients at 0.6 A of at least 35 cm.sup.-1 and very little browning from X-radiation and electron impingement thereon. The glasses are essentially free from PbO and other readily-reducible metal oxides and consist essentially, in weight percent on the oxide basis, as calculated from the batch, of:

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patent: 3464932 (1969-09-01), Connelly et al.
patent: 3794502 (1974-02-01), La Grouw
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patent: 3808154 (1974-04-01), Omori
patent: 3819972 (1974-06-01), Sanner
patent: 3925089 (1975-12-01), Houben
patent: 3987330 (1976-10-01), Shell
patent: 4015966 (1977-04-01), Weaver
patent: 4065697 (1977-12-01), Steierman
patent: 4089693 (1978-05-01), La Grouw et al.

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