Title :
Field dependence of the electromechanical properties of fine grained hydrothermally processed lead titanate ceramics
Author :
Pardo, L. ; Ricote, J. ; Alemany, C. ; Jimenez, B. ; Millar, C.E.
Author_Institution :
Inst. de Ciencia de Materiales, Madrid, Spain
fDate :
30 Aug-2 Sep 1992
Abstract :
Fine-grained Sm-modified lead titanate ceramics prepared from hydrothermally processed powders have been microstructurally characterized by quantitative stereology. The poling field dependence of their permittivity and losses and their electromechanical and elastic properties as determined by the resonance method are compared with those of Ca-substituted titanates. The results are also used to evaluate the influence of grain size on the behavior of the electromechanical properties relative to the poling field. This behavior is considered to determine the most appropriate conditions for the production of ceramics for high-frequency applications
Keywords :
X-ray diffraction examination of materials; ceramics; dielectric losses; dielectric polarisation; ferroelectric Curie temperature; grain size; lead compounds; permittivity; piezoelectric materials; porosity; scanning electron microscope examination of materials; sintering; Pb0.88Sm0.08Ti0.99Mn0.01 O3; PbSmTiO3MnO3; SEM; X-ray diffraction; dielectric losses; electromechanical properties; ferroelectric transition temperature; fine grained ceramic; grain size; high-frequency applications; hydrothermally processed powders; permittivity; poling field dependence; porosity; quantitative stereology; resonance method; sintering; Ceramics; Dielectric losses; Dielectric substrates; Frequency; Grain size; Microstructure; Permittivity; Resonance; Titanium compounds; X-ray scattering;
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.1992.300578
