The Thermally Stimulated Depolarization Current (TSDC) of the modified SBN ferroelectric ceramic system was studied. The TSDC measurements show the pyroelectric peak for all compositions while a second smaller peak at higher temperatures, possibly associated to induced vacancy-impurity dipoles is also observed in all cases. The second peak contribution was experimentally and mathematically eliminated. The activation energies and infinite temperature relaxation time of both processes are determined.
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