Title :
Single-microstructure in ferroelectric ceramics of PbTiO3
Author :
de Olmo, L. ; Calzada, M.L. ; Alemany, C.
Author_Institution :
Inst. Ciencia de Mater., CSIC, Madrid, Spain
Abstract :
A [TiO(OH)2+Pb(OH)2] xerogel has been prepared from a sol-gel process by an inorganic route. The synthesis of this gel at 900°C/1 h provides a PbTiO3 ceramic precursor with a high crystalline anisotropy (c/a≃1.063). Sintering at 1100°C leads to ceramic materials with a bulk density of 90% and a microstructure of twinned single crystals with associate porosity. These PbTiO3 ceramics have a Curie point of 434.5°C and d33 values of 50 pC-N after poling with electric fields of 100 kV-cm-1
Keywords :
ceramics; crystal microstructure; dielectric polarisation; ferroelectric Curie temperature; ferroelectric materials; lead compounds; porous materials; sol-gel processing; 1 hr; 434.5 degC; 900 degC; Curie point; PbTiO3; bulk density; crystalline anisotropy; d33 values; ferroelectric ceramics; inorganic route; poling; porosity; precursor; single microstructure; sintering; sol-gel process; twinned single crystals; xerogel; Ceramics; Ferroelectric materials; Infrared heating; Infrared spectra; Lead; Microstructure; Polymers; Scanning electron microscopy; Temperature; X-ray scattering;
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.1990.200318
