METHOD AND DEVICE FOR PRODUCING ROTATIONALLY SYMMETRICAL QUARTZ GLASS CRUCIBLES

摘要

The invention relates to a device (5) for producing a quartz glass crucible (2). At least two electrode arrangements (7, 8) which are evenly distributed on the periphery of the quartz glass crucible (2) and which produce a first arc and an additional arc each heat a section (14, 15) of a wall (13) of the quartz glass crucible (2), which rotates during this process. The use of multiple electrode arrangements (7, 8) enables the period in which the sections (14, 15) cool off before reaching the next heating area (11, 12) to be shortened, which in turn prevents an undesirable considerable temperature difference in the wall (13). At the same time, the necessary heat output for each individual electrode arrangement (7, 8) can be reduced, which reduces evaporation phenomena and the bubble formation that is associated with this. This not only improves quality but also shortens the production process.