Cathode-ray tube face-plate

C - Chemistry – Metallurgy – 03 – C

Patent

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261/14, 313/35.3

C03C 3/085 (2006.01) C03C 3/078 (2006.01) C03C 4/08 (2006.01) H01J 29/86 (2006.01)

Patent

CA 1144184

PHN.9559 2.4.80 "ABSTRACT": "Cathode-ray tube face-plate". Glass compositions which are suitable for making face-plates of cathode-ray tubes used for displaying television pictures, particularly for displaying colour television pictures. A problem in formulating such glasses is to obtain glasses which can be worked satisfactorily and which do not discolour signifcantly as a result of electron bombardment and X-ray irradiation. Glass com- positions may consist of the following constituents in the following quantities (expressed in % by weight): Image wherein wt.% Na2O/(wt.% Na2O + wt.% K2O) 0.40-0.47 and wt. % HaO+2 wt.% SrO + 2 wt.% ZrO2 + 3 wt.% PbO > 32. (No Figure)

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