(*) 50 mm without radiation screen. However, in this mode very large temperature
gradients are expected.
|Thread on stick|
|FS||small furnace ||350...700 K ||25*|| ||M6 female|
|FT||tantalum furnace||375...1400 K||50||45||M6 female|
|FI||ILL-type furnace||500...1800 K||40||35||M8 male|
Please contact the sample environment group before any experiment with a furnace.
There are different aspects that have to be discussed in advance.
Working with high temperature furnace need great care:
- the choice of an adequate container:
- does the sample react with the container? For metallic
samples, please check the phase diagrams of possible alloys
which might be created when the sample reacts with the container
or sample stick.
- is the sample outgasing? It is preferred to work with
either an open container, or with a container connected
to a tube sample stick, allowing to control the atmosphere
- the thermocouples have to be fixed well, and the proper
calibration curve has to be selected.
- never use Cadmium or Indium in a furnace, even not at relatively 'low' temperatures
The pictures below shows what might happen, if these rules are not
Picture 1: Reaction of the sample with the container.
Picture 2,3,4,5: Molten and condensed Cadmium.