Thermomechanical Analysis (TMA)
Thermal expansion coefficients are determined accurately and precisely by Thermomechanical Analyzers with nanometer resolution from -150 to 1600 °C .
Thermomechanical analysis (TMA) is used to measure dimensional changes of a material as a function of temperature. Thermal expansion and effects such as softening, crystallization and solid-solid transitions determine the potential applications of a material and provide important information about its composition. Viscoelastic behavior can be studied by varying the applied force (DLTMA mode).
The TMA/SDTA 2+ incorporates Swiss precision mechanics and is available in four versions with furnace systems optimized for measurements between –150 and 1600 °C.
The TMA/SDTA 2 + is the only instrument on the market that measures the sample temperature very close to the sample in all operating modes. This enables temperature adjustment to be carried out using reference substances (e.g. the melting points of pure metals) or through a change in length. The SDTA signal is the difference between the measured sample temperature and the reference temperature calculated using a model. This means that besides the length change, the simultaneously measured SDTA signal is also available as a measurement quantity. In many cases, this can facilitate the correct interpretation of a measurement curve.
Wide measurement range
16 000 000 data points are available for the entire measurement range of ±5 mm. This means that both small and large samples (maximum 20 mm) can be measured with 0.5 nm resolution without the need for range switching.
The mechanical part of the measuring cell is accommodated in a thermostated housing. This guarantees excellent accuracy for the determination of expansion coefficients. Water from the circulator is also used to cool the furnace and reduce cooling times.
Defined furnace atmosphere
The furnace chamber can be purged with a defined gas. This process is software controlled, which makes it very easy to switch from an inert atmosphere to reactive conditions.
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