A measuring cell for the dielectric study of liquid crystals having high transition temperatures (up to 200 degrees C) in the frequency range 1 Hz-1 GHz

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Abstract
A measuring cell for the dielectric study of liquid crystals is presented. This cell allows one to perform measurements for samples having high phase transition temperatures (up to 200 degrees C) within a wide frequency range (1 Hz-1 GHz). Moreover, a small quantity of sample is used and the study of anisotropic phases is easy. After the description of the cell, the authors report dielectric results obtained for two liquid crystals. Various dielectric spectra obtained have shown that this cell have a good behaviour with regard to the temperature and frequency ranges.