Linseis L75V PT: Dilatometer

The Dilatometer is used to measure the thermal expansion of materials as a function of temperature. A controlled atmosphere furnace heats or cools a sample to a target temperature whilst a push-rod transfers the vertical expansion of the sample into a high resolution strain gauge. From this the relative increase in length and the coefficient of thermal expansion (CTE) can be calculated.

Technical specifications:

  • High temperature furnace: RT to 2000°C
  • Low temperature furnace: -150°C to 500°C
  • Vertical push-rods for minimal friction on expansion and guaranteed push-rod contact
  • Measurement range: ±2.5mm, resolution: 0.03nm
  • Variable force contact rods
  • Dual push-rod setup for either higher through-put or direct reference measurement
  • Choice of atmosphere: Inert / Oxidising / Reducing / Vacuum
  • CTE accuracy: ±0.5%
  • Max data acquisition rate: 2MHz
  • Temperature accuracy: ±0.5°C or 0.25%
  • Standard: ASTM E831 / ASTM D696
Linseis L75V PT: Dilatometer
Diagram of the Dilatometer with key components highlighted: sample position in red, push-rod in yellow and furnace in green.

Diagram of the Dilatometer with key components highlighted: sample position in red, push-rod in yellow and furnace in green.

Expansion of a graphite based material heated up to 2000°C at 15°C/min with 3 repeats. Also shown is the value for the coefficient of thermal expansion, α, derived for the three runs as a function of temperature.

Expansion of a graphite based material heated up to 2000°C at 15°C/min with 3 repeats.
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