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Development of relaxor based improved piezoelectric single crystals (DORIS)


DORIS Research and Development Programme follows a global approach as it combines all generic crystal growth methods and state of the art tentative compositions. Crystal growth routes studied and developed during the project lead to piezoelectric single crystals include: Bridgman method, Heat Exchange Method, TSSG method. Processes have been developed and optimized during the whole project duration (starting composition, temperature and temperature gradients cycles, crucible selection�) to reach single crystals of sufficient size for the manufacture of ultrasound transducers.