Thermal expansion, polarization and phase diagrams of Ba1−yBi2y/3Ti1−xZrxO3 and Ba1−yLayTi1−y/4O3 compounds

Michail Gorev (1) , Vitaly Bondarev (1) , Igor Flerov (1) , Mario Maglione (2) , Annie Simon (2) , Philippe Sciau (3) , Madona Boulos (4) , Sophie Guillemet-Fritsch (4)

1 Kirensky Institute of Physics, Siberian Division
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 CEMES - Centre d'élaboration de matériaux et d'études structurales
4 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

The thermal expansion properties of the ceramic compositions Ba1−yLayTi1−y/4O3 (y = 0.0, 0.026, 0.036, 0.054) and Ba1−yBi2y/3Ti1−xZrxO3 (y = 0.10; x = 0.0, 0.04, 0.05, 0.10, 0.15) were determined in the temperature range 120–700 K. We report the temperature-dependent measurements of the strain, thermal expansion coefficient and the magnitude of root mean square polarization. The results obtained are discussed together with the data on the structure and dielectric properties.

Mots clés: Phase diagrams; Solid solution; Ceramics; Thermal expansion coefficient; Titanates; Zirconates; Dielectric properties; Temperature effects; Thermal properties; Thermal expansion; Phase transitions and Curie point; Polarization

Domaines: Matériaux

Michail Gorev, Vitaly Bondarev, Igor Flerov, Mario Maglione, Annie Simon, et al.. Thermal expansion, polarization and phase diagrams of Ba1−yBi2y/3Ti1−xZrxO3 and Ba1−yLayTi1−y/4O3 compounds. Journal of Physics: Condensed Matter, 2009, 21 (7), 075902 (7 p.). ⟨10.1088/0953-8984/21/7/075902⟩. ⟨hal-00362482⟩