Assertion: cathode | /r/MadeOf | porous tungsten
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Cathodes are often made from porous tungsten filled with a barium compound, which gives low work function; the structure of cathode has to be tailored for the application.
text: Cathodes are often made from porous tungsten filled with a barium compound, which gives low work function; the structure of cathode has to be tailored for the application.