2d Material

Dilatometer

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Dilatometer
Nuclear Materials

Dilatometry measures dimensional changes in a material as a function of temperature in a controlled atmosphere. This allows for the obtaining of the coefficient of thermal expansion of a material. The vertical push-rod design benefits from no friction on expansion, with guaranteed push-rod contact. Both dilatometers at the UKAEA-MRF are dual push-rod systems, which allow for direct comparison of a sample with unknown thermal properties to a well characterised reference sample, and both are subjected to exactly the same environment. The two separate instruments have furnaces for operation at -100-500°C and RT- 2000°C. These are fully automated and can be controlled remotely.

Linseis L75V (2x)

Temperature range

-100-500°C / RT-2000°C

Resolution

0.1nm

Measurement range

+/-2500µm

CTE accuracy

+/-0.5%

CTE reproducibility

+/-100nm (for fused silica)

Atmospheres

Inert / Oxidising / Reducing / vacuum

Precision / reproducibility

Thermal diffusivity

+/-3% / +/-2%

Specific Heat

+/-5% / +/-3%

Data acquisition rate

2MHz

Temperature accuracy

+/-0.5°C or 0.25%

Standard

ASTM E831 / ASTM D696


Uses

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