Title :
Contribution of the technique of thermostimulated currents for the elucidation of the nature of the Johari-Goldstein and other secondary relaxations in the vitreous state
Author :
Diogo, HermiÌnio P. ; Moura Ramos, J.J.
Author_Institution :
Inst. Super. Tecnico, Univ. de Lisboa, Lisbon, Portugal
Abstract :
In this work the usefulness of the technique of thermally stimulated depolarization currents (TSDC) to the study of the secondary relaxations in amorphous solids, and particularly of the Johari-Goldstein (JG) relaxation, is emphasized. The features of the JG relaxation are carefully analyzed, and the contribution of this experimental technique for the elucidation of its molecular mechanisms is also stressed.
Keywords :
ageing; dielectric polarisation; dielectric relaxation; thermally stimulated currents; Johari Goldstein relaxation; amorphous solids; molecular mechanisms; secondary relaxations; thermally stimulated depolarization currents; thermostimulated currents; vitreous state; Aging; Atmospheric measurements; Dielectrics; Entropy; Glass; Temperature measurement; Temperature sensors; Dielectric polarization; JG-relaxation; Johari-Goldstein; aging; amorphous materials; relaxation processes; secondary relaxations; thermally stimulated currents;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2014.004078
