The sample is located in a furnace that is held at a predetermined temperature. At this temperature the sample surface is then exposed to a programmed laser pulse. The temperature rise at the opposite surface of the sample is measured by a high-speed IR detector. From the temperature versus time data, the specific heat and thermal diffusivity of the material can be computed. The Laser Flash Analyser used in the MRF features two furnaces for operation at -100-500°C and RT- 2000°C. These are fully automated and can be controlled remotely.
Linseis LFA 1000
-100-500°C / RT-2000°C
YAG laser 25 J/pulse
InSb / MCT IR detector
Measurement range thermal diffusivity
0.01mm2/s – 1000mm2/s
Measuring range thermal conductivity
0.1W/mK – 2000W/mK
ø 10, 12.7, 24.5mm / 10 x 10mm square
0.1mm – 6mm
Inert / Oxidising / Reducing / vacuum
Precision / reproducibility
+/-3% / +/-2%
+/-5% / +/-3%
Data acquisition rate
ASTM 1461 compliant
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