Title :
Dielectric relaxation in ceramics with composition (Ba1-yPby)TiO3
Author :
Kazaoui, S. ; Ravez, J. ; Elissalde, C.
Author_Institution :
Bordeaux I Univ., Talence, France
fDate :
30 Aug-2 Sep 1992
Abstract :
A dielectric dispersion study of perovskite-type ferroelectric ceramics in the frequency and temperature ranges 106-109 Hz and 300-500 K, respectively, has been performed. The ceramics have the composition (Ba1-yPby)TiO3 (0⩽y⩽0.2). A dielectric relaxation appears not only in the ferroelectric phase but also in the paraelectric one. For each composition a minimum of the relaxation frequency occurs at TC. The dipolar-type relaxation is correlated with coherent displacements of the Ti4+ ions in the octahedron sites ordered either along chains or in the 3-D-lattice
Keywords :
barium compounds; ceramics; dielectric relaxation; ferroelectric Curie temperature; ferroelectric materials; ferroelectric transitions; lead compounds; permittivity; (Ba1-yPby)TiO3; 106 to 109 Hz; 1300 C; 2 hours; 300 to 500 K; 3D lattice; Curie temperature; coherent displacements; dielectric dispersion; dielectric relaxation; dipolar-type relaxation; ferroelectric phase; octahedron sites; paraelectric phase; permittivity; perovskite-type ferroelectric ceramics; relaxation frequency; sintering; thermal dependence; Ceramics; Dielectric measurements; Ferroelectric materials; Frequency dependence; Grain size; Microstructure; Permittivity; Solids; Temperature dependence; Temperature distribution;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300590
