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Dilatometry

Dilatometry allows dimension changes in a specimen to be read as a function of temperature. The high temperature dilatometer 402 E, which uses this analysis method, is a computer assisted measuring unit for determining various material parameters, in particular thermal expansion.

The high level of accuracy exhibited by the temperature control and the sensitive length measuring device allow not only the determination of thermal expansion but also the thermal expansion coefficients, density changes, decomposition, sintering, phase transition and glass transition temperature of a material.

When carrying out the measurement, the specimens are positioned in a protective tube and heated in shielding gas or a vacuum atmosphere respectively. However, the actual specimen temperature is measured with a thermoelement. A quartz rod on an inductive displacement sensor relays information on the length change of the specimen. The measuring signal for the length change becomes stronger and is fed into an XY writer synchronously with the temperature measuring signal.

The data thus won are absolutely essential for the analysis of thermally induced tensions in join compounds. Especially during the cooling phase of a soldering process when joining hybrid microsystems, varying expansion coefficients must be taken into consideration.

The dilatometer is a flexible thermal analysis unit which makes it possible to examine and optimise material combinations for industrial application of soldered microsystems with a low level of expenditure.

 

Technical data:

  • Operating range: 20-1300 C
  • Working athmosphere: Argon or vacuum

 

 




Manufacturer: Netzsch-Geraetebau GmbH