Title :
Ferroelectric properties of the mixed Aurivillius phase Bi7 Ti4NbO21
Author :
Maalal, R. ; Manier, M. ; Mercurio, J.P. ; Frit, B.
Author_Institution :
Lab. de Mater. Ceramiques et Traitements de Surface, CNRS, Limoges, France
Abstract :
Room and high temperature X-ray diffraction, DSC, dilatometric and dielectric measurements have shown that the mixed Aurivillius phase Bi 7Ti4NbO21 presents two characteristic temperatures. The first one-close to 675°C-seems to be attributed to a ferroelectric-paraelectric transition connected with a structural change from orthorhombic to tetragonal. The second one, strongly observed by dielectric measurements concerns a possible ferroelastic-paraelastic phase transition
Keywords :
X-ray diffraction; bismuth compounds; ferroelastic transitions; ferroelectric materials; ferroelectric transitions; thermal analysis; titanium compounds; 675 degC; Bi7Ti4NbO21; DSC; X-ray diffraction; characteristic temperatures; dielectric measurements; dilatometric measurements; ferroelastic paraelastic phase transition; ferroelectric properties; ferroelectric-paraelectric transition; high temperature; mixed Aurivillius phase; orthorhombic to tetragonal transition; room temperature; structural change; Bismuth; Ceramics; Crystals; Dielectric measurements; Ferroelectric materials; Lattices; Powders; Resonance; Temperature; X-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522352
