Assertion: fused silica | /r/ObjectUse | used as refractory material
Facets:
value: in investment casting
type: TEMPORAL
Source sentences:
text: Fused silica is used as a refractory material or in investment casting.
text: Fused silica can also be used as a refractory material or in investment casting, and it is used to make windows for manned spacecraft due to its strength.