Gettering device

Details Gettering device Gettering device

H - Electricity

01

J

316/10, 252/21

H01J 7/18 (2006.01) H01J 29/94 (2006.01) H01J 35/20 (2006.01)

Patent

CA 1071176

ABSTRACT: The chemical resistance of a gettering de- vice comprising a mixture of barium-aluminium powder and nickel powder compressed in a metal holder is considerably increased by using nickel powder having a specific surface smaller than 0.15 m2 per gram and an average grain size smaller than 80 microns, while the barium aluminium powder has an average grain size smaller than 125 microns. The said gettering device is extremely suitable for use in the manufacture of a colour display tube in which the gettering device is to be placed inside the envelope of the tube before certain parts of said envelope are sealed together at a high temperature. -12-

261869

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