Assertion: molybdenum | /r/HasProperty | sealed
Facets:
value: physically
type: MANNER
Source sentences:
text: In 1906, William D. Coolidge filed a patent for rendering molybdenum ductile, leading to applications as a heating element for high-temperature furnaces and as a support for tungsten-filament light bulbs; oxide formation and degradation require that molybdenum be physically sealed or held in an inert gas.