Thermal Conductivity Instruments
LFA / THB / TIM-Tester / HFM and many more
The most common way to measure thermal diffusifity will be the well known Laser flash method (LFA). Here a sample is pulsed with a Laser and an IR detector on the opposite detects the temperature rise of the sample, what leads to the thermal diffusifity. If the density and specific heat capacity are known, the thermal conductivity can be calculated.
The LFA process is extremely useful for gauging the quality and capabilities of materials such as the ceramic used in automobile brake systems or rocket engines. Another common application for this technology is in the chemical industry, where LFA is utilized to determine the conductivity of silicone oils and sodium nitrate. These are used as electrical insulators and phase change materials for storing and releasing thermal energy.
For thin film samples and micro samples, known from the computational industries, there are also the new thin film laser flash (TF-LFA) and thin film analyzer (TFA), that can measure the desired thermal conductivity and diffusivity with highest precision as well.
for the determination of thermal conductivity and thermal diffusivity
Sample preparation of solids is as simple as it is straightforward. One plane contact surface of each of two sample halves is sufficient for the sensor. Calibration is very simple and does not need to be performed before each measurement.
The THB measures absolute values with an accuracy that does not lag behind conventional plate or LaserFlash devices.