Phase transitions in Nb-doped Pb(Zr0.95Ti0.05)O3ceramics investigated by dielectric, pyroelectric and Raman scattering measurements

Autor:	G. E. Kugel, J. Handerek, Z. Ujma
Rok vydání:	1997
Předmět:	Phase transition Materials science Analytical chemistry Dielectric Condensed Matter Physics Ferroelectricity Electronic Optical and Magnetic Materials Pyroelectricity Crystal symbols.namesake Phase (matter) symbols Raman spectroscopy Raman scattering
Zdroj:	Ferroelectrics. 198:77-97
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150199708228340
Popis:	Dielectric and other complementary measurements were carried out in order to confirm the AO-FR(LT)-FR(HT)-PC phase sequence and to determine the temperatures of each phase transition occurring in undoped PZT ceramics with Zr/Ti ratio 95/5 and Nb-doped ceramics with 0.25 ÷ 1 weight % of Nb2O5. These measurements revealed the diffused character of particular phase transitions and especially of the AO-FR(LT) one. The AO-FR(LT) and FR(LT)-FR(HT) phase transitions occur only in the part of sample volume in the vicinities of the determined temperatures of these transitions and the first one is extremaly broadened and extended towards the low temperatures in the remaining volume of the crystal. Temperature evolution of Raman spectra and the central peak revealed changes of the structure, frequencies and intensity of the scattered light in each phase transition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1202f5263fa8c3ff698b543161e13316 https://doi.org/10.1080/00150199708228340 Zobrazit plný text záznamu