Non-browning cathode ray tube glasses

Details Non-browning cathode ray tube glasses Non-browning cathode ray tube glasses

1994-12-19

1995-11-21

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 69, 313480, 252478, C03C 3095

Patent

active

054686920

ABSTRACT:
This invention is directed to glass compositions particularly designed for use in rear projection tube applications. The glass compositions are essentially free from ZnO, PbO and other easily reducible metal oxides other than Sb.sub.2 O.sub.3 and are essentially colorless. The glasses exhibit essentially no browning discoloration upon being exposed to high voltage electrons, linear coefficients of thermal expansion (25.degree.-300.degree. C.) between about 97-100.times.10.sup.-7 .degree. C., annealing points not lower than about 475.degree. C., strain points not lower than about 440.degree. C., electrical resistivities expressed as Log R greater than 9 at 250.degree. C. and greater than 7 at 350.degree. C., and liquidus temperatures below about 1100.degree. C. The glass compositions consist essentially, expressed in terms of weight percent on the oxide basis, of

REFERENCES:
patent: 2477329 (1949-07-01), DeGier et al.
patent: 3464932 (1968-09-01), Connelly et al.
patent: 3805107 (1974-04-01), Boyd
patent: 4277286 (1981-07-01), Boyd et al.
patent: 4337410 (1982-06-01), Van der Geer et al.
patent: 4734388 (1988-03-01), Cameron et al.
patent: 4830990 (1989-05-01), Connelly
patent: 5108960 (1992-04-01), Boek et al.
patent: 5215944 (1993-06-01), Jones

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