Phase transition and impedance spectroscopy analysis of Pb5(Cr1−xAlx)3F19ceramics

Autor:	Jean Ravez, Jean-Maurice Réau, Mohamed El Omari
Rok vydání:	1999
Předmět:	Permittivity Phase transition Condensed matter physics Chemistry Phase (matter) Inorganic chemistry General Materials Science Spectroscopy Instrumentation Ferroelectricity Phase diagram Dielectric spectroscopy Solid solution
Zdroj:	Phase Transitions. 69:227-236
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411599908208021
Popis:	Analysis of the a.c. conductivity data of Pb5Al3F19 within the complex permittivity formalism allowed, in a previous work, to show a new transition at 670 K corresponding most probably to the expected, but hitherto unobserved, transition from the paraelastic phase II to the paraelectric prototype phase I of Pb5Al3F19. A new investigation of Pb5(Cr0.1Al0.9)3F19 confirms this and allows us to complete the phase diagram of the Pb5(Cr1−x ;Alx)3F19 solid solution system for (0.80 ⩽ x ⩽ 1) in the high-temperature range. Ceramics with compositions corresponding to x = 0 and 0.5 were also characterized by this type of spectroscopy impedance method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::443c55df13c977d8af108e7f51d542e9 https://doi.org/10.1080/01411599908208021 Zobrazit plný text záznamu