Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1984-08-20
1989-02-14
Locker, Howard J.
Electric lamp and discharge devices
Cathode ray tube
Envelope
2505151, 2505181, 252478, 252629, 313477R, 313479, 358247, 378161, 445 22, 501 62, 501 63, 501 64, 501 72, 501 74, 501152, 501153, 501154, H01J 3100, H04N 565, G21K 100
Patent
active
048048852
ABSTRACT:
X-ray attenuating ceramic materials having at least one substance selected from the group including compounds of strontium, zirconium, yttrium, niobium, molybdenum, neodymium and tungsten are disclosed. A zinc compound can be used for fluxing and X-ray attenuation in certain ceramic materials. The materials can be formed into strong, non-porous bodies such as cathode ray tube funnels. Such materials include forsteritic porcelains manufactured from batches containing strontium zirconate. Other X-ray attenuating ceramics contain a mixture of X-ray attenuating substances, including a compound of barium.
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McAlpin James L.
Petersen Ronald O.
Locker Howard J.
Polley Richard J.
Tektronix Inc.
Winkelman John D.
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