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 on the opposite surface of the sample is measured by a high-speed IR detector. From the temperature versus time data, the 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.
Determining the thermal diffusivity and thermal conductivity of materials.
- Temperature ranges: -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
- Sample directions: ø 10 or 12.7mm
- Sample thickness: 0.1mm – 6mm
- Inert atmosphere
- Thermal diffusivity: +/-3% / +/-2%
- Specific heat: +/-5% / +/-3%
- Data acquisition rate: 2MHz
- Temperature accuracy: +/-0.5K
- Standard: ASTM 1461 compliant