Title :
Pyroelectric properties of various LiTaO3 related ceramics
Author :
In, H.-B. ; von der Muhll, R. ; Ye, Z.-G. ; Ravez, Jean
Author_Institution :
Lab. de Chimie du Solide, CNRS, Talence, France
Abstract :
Highly densified LiTaO3 derived ceramics have been obtained in the LiTaO3-Li2O, LiTaO3-LiMgF3-LiMg(OH)3, LiTaO3 -Li2SiO3 and LiTaO3-CaZrO3 systems. The purpose was to relate the composition and the texture of the ceramic to its pyroelectric properties. All samples investigated showed a ferroelectric-paraelectric transition. The LiTaO 3-type solid solution in the LiTaO3-CaZrO3 system presented a diffuse phase transition resulting from chemical inhomogeneities. The pyroelectric coefficients of polarized ceramics were close to 4 nC-cm-2 K-1, a value which can be increased up to 6 nC-cm-2 K-1 by quick sintering for the calcium and zirconium containing samples
Keywords :
ceramics; ferroelectric materials; ferroelectric transitions; lithium compounds; pyroelectricity; LiTaO3-CaZrO3; LiTaO3-Li2O; LiTaO3-Li2SiO3; LiTaO3-LiMgF3-LiMg(OH)3; ceramics; chemical inhomogeneities; diffuse phase transition; ferroelectric-paraelectric transition; pyroelectric properties; quick sintering; Ceramics; Chemicals; Dielectric loss measurement; Ferroelectric materials; Firing; Grain size; Polarization; Pyroelectricity; Solid state circuits; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 1990., IEEE 7th International Symposium on
Conference_Location :
Urbana-Champaign, IL
Print_ISBN :
0-7803-0190-0
DOI :
10.1109/ISAF.1990.200263
