thoriated tungsten filament

thoriated tungsten filament

[′thȯr·ē‚ād·əd ¦təŋ·stən ′fil·ə·mənt]
(electronics)
A vacuum-tube filament consisting of tungsten mixed with a small quantity of thorium oxide to give improved electron emission. Also known as thoriated emitter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.