摘要:
The invention relates to a crucible (1) having a wall (3) which is made of a base material of tungsten or molybdenum or of a tungsten-based or molybdenum-based material, characterized in that a barrier layer (2) from a metallic material with a higher affinity to carbon and/or oxygen than the base material is formed at least in sections on an outer side (6) of the wall (3) and/or in the wall (3).
摘要:
The invention relates to a charging device comprising at least one portion made of Mo, a Mo alloy containing > 90 wt% Mo, W, a W alloy containing > 90 wt% W, or a Mo-W alloy containing a combined total of > 90 wt% Mo + W, and at least one portion made of Ta or a Ta alloy containing > 90 wt% Ta. Said charging device has excellent dimensional stability when used in high-temperature furnaces. In addition, there is no cross-contamination of the burning material.