oxide-coated cathode

oxide-coated cathode

[′äk‚sīd ‚kōd·əd ′kath‚ōd]

(electronics)

A cathode that has been coated with oxides of alkaline-earth metals to improve electron emission at moderate temperatures. Also known as Wehnelt cathode.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.