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Institute Applied Materials

Thermoanalysis Laboratory

This laboratory provides facilities to characterise the behaviour of matter as the temperature is varied. Associated chemical reactions or phase transformations might give rise to exothermic/endothermic reactions which are detected by Differential Scanning Calorimetry (DSC). The reactions might also lead to the release of gaseous reaction products, which affects the mass of the sample. The very sensitive thermobalance in this Thermogravimetry (TGA) facility can detect even the slightest change. The TGA can be coupled to a Mass Spectrometer (MS) to analyse the type of gaseous reaction products released.

Nearly arbitrary heating and cooling profiles can be applied in all cases. The analyses then provide the information of released/absorbed heat, mass and reaction products as a function of time or temperature.

The laboratory is open to the users of our large scale synchrotron X-ray and neutron beam lines. Typical applications include:

·    Desorption processes in hydrogen storage materials (DSC, TGA and MS)
·    Drying process of soil (TGA+MS)
·    Wetting/dewetting of ion and proton conductors (TGA)
·    Phase transformations in alloys (DSC)
·    Dehydrogenation of steels (MS)

Differential Thermal Analysis (DSC)

·    Perkin Elmer Pyris 1
·    power compensation temperature null principle
·    independent dual furnaces with Pt resistance heaters and temperature sensors
·    static or dynamic atmosphere including N, Ar, He, CO2, O2
·    temperature range 77 K - 750°C
·    sensitivity 0.2 µW
·    calorimetric accuracy 0.1%, precision 0.01°C
·    heating rates up to 300 K/min

Differential Thermal Analysis (DSC)

·    Netzsch TG209 F1 Iris
·    vacuum-tight microbalance system
·    mass up to 2 g (incl. crucible), mass resolution 0.1 µg
·    three gases can be used as carrier gases
·    temperature up to 1000°C
·    heating range 0.1 to 100 K/min

Mass Spectrometer (MS)

·    Netzsch QMS 403C Aeolos
·    mass range 1 to 300 amu
·    software for quantitative analysis of gas compositions

Mass Spectrometer - enlarged view

Mass spectrometry

Differential Scanning Calorimetry - enlarged view

Differential Scanning Calorimetry