부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.msea.2005.12.087 Byline: F. Cordero (a), A. Franco (a), V.R. Calderone (b), P. Nanni (b), V. Buscaglia (c) Keywords: Perovskites; Anelastic spectroscopy; O vacancies Abstract: We present the results of anelastic relaxation experiments (2-30akHz) on ceramic SrTiO.sub.3 subjected to reduction in H.sub.2 atmosphere, which yields a balance between oxygen vacancy (V.sub.O) and (OH).sup.- defects. The resulting anelastic spectrum contains, besides the well known structural transformation near 110aK, several thermally activated relaxation processes between 200 and 700aK. The two main elastic energy loss peaks are proposed to provide the first measurement of the hopping rate of V.sub.O and (OH).sup.- defects in pure SrTiO.sub.3. Author Affiliation: (a) CNR-ISC Istituto dei Sistemi Complessi, Area della Ricerca di Roma-Tor Vergata, Via del Fosso del Cavaliere, 100, I-00133 Roma, Italy (b) DICheP (Department of Process and Chemical Engineering), University of Genoa, Fiera del Mare, P.le Kennedy, I-16129 Genoa, Italy (c) CNR-IENI, Institute for Energetics and Interphases, Department of Genoa, via De Marini 6, I-16149 Genoa, Italy Article History: Received 29 July 2005; Revised 26 December 2005; Accepted 26 December 2005