thoriatedadj.
/ˈθɔːrɪeɪtɪd/ Of tungsten, or a valve filament made of tungsten: containing a proportion of thorium, e.g. to enhance electron emission in a valve.
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the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [adjective] > specific types of valve
thoriated1922
bright-emitting1924
multi-electrode1926
variable-mu1930
planar1937
1922 Encycl. Brit. XXXII. 1025/1 A thermionic valve of the latter type comprises a highly exhausted glass bulb having in it a filament of tungsten, or thoriated tungsten.
1951 Engineering 12 Oct. 459/1 The final..output stage consists of two water-cooled thoriated-filament triodes.
1973 J. G. Tweeddale Materials Technol. II. v. 118 Commonly, a non consumable electrode is made of tungsten or a tungsten alloy (notably thoriated tungsten).
This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018).
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adj.1922