Abstract
Thermal diffusivity of various compounds used as coupling fluids in photopyroelectric experiments have been measured at room temperature and at 80 K. Measurements on high vacuum silicone grease have also been performed as a function of temperature and an increase in the thermal diffusivity values with decreasing temperature has been found. Two phase transitions in the LiTaO3 pyroelectric transducer have been observed at 200 and 225 K.
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Marinelli, M., Mercuri, F., Zammit, U. et al. The influence of the coupling fluids and of the pyroelectric transducer on low-temperature photopyroelectric studies. Appl. Phys. A 52, 115–118 (1991). https://doi.org/10.1007/BF00323726
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DOI: https://doi.org/10.1007/BF00323726