Application
Possibilities:
- Temperature limit: 1550°C
- Max heating rate: 5ºC/min up to 300ºC, typically 4 h to 1500ºC
- Max cooling rate: 5ºC/min, typically 5 h from 1500ºC
- Size: 5 cm inner tube diameter
- Atmosphere:
- Oxidizing
- Non-toxic gas
- Carbon-free environment
- Gas purging
- Sampling
- Cooling of off-gas
Can not be used for
- Samples which
- Evaporate and condenses onto alumina tube
- Rapid heating/cooling
- Vacuum
- Precisely controlled atmosphere (leakage)
- Highly toxic gases (leakage)
Previously used for
- Hydrogen, CO and steam purging on silicon melt, with sampling of melt.
Before you begin
- Contact equipment responsible:
- Equipment may not be used without training
- Contact room responsible for access.
Relevant links:
Known problems and fixes:
- Alumina tube easily breaks by mechanical and thermal shock
- At present not vacuum tight (leakage)
- Heating and cooling take hours
- Crucible height can not be easily adjusted
- Requires cutting and stacking of alumina spacers.
- Cooling water safety switch is sensitive
- Typically causes "0r" error on temperature controller and power shut-down
- Power can be turned back on after checking cooling water and ensuring contact in cooling water safety switch (push down lever).
Documentation
Description | File | Author |
---|---|---|
Temperature profile | Øyvind S. Sortland | |
Operating procedure | Procedure_Si melting.docx | Øyvind S. Sortland |
Sampling procedure | ||
Temperature controller manual | ||
Furnace schematic | FurnaceInt_v12.png | Jo Fenstad, Øyvind S. Sortland |