authors |
Tkach, A; Araujo, B; Vilarinho, PM |
editors |
Vilarinho, PM |
nationality |
International |
journal |
ADVANCED MATERIALS FORUM III, PTS 1 AND 2 |
author keywords |
SrTiO3; doping; dielectric ceramics; structure |
keywords |
PHASE-TRANSITIONS; SRTIO3 |
abstract |
The effect of the electric field on the dielectric response of the Sr1-xCaxTiO3 ceramic system was analysed and complemented by structural and microstructural studies. A monotonic decrease of the lattice parameter and an increase of the average grain size from I I to 23 mu m with increasing x were observed by X-ray diffraction and scanning electron microscopy analysis respectively. Samples with x = 0.003 and 0.01 reveal a monotonous increase of low-temperature dielectric constant, corresponding to an enhancement of the tunability and a reduction of the driving electric field at 10-30 K for x = 0.01. For Sr1-xCaxTiO3 ceramic samples with x = 0.04 and 0.10 the ferroelectric phase transition of around 20 K was observed together with the enhanced tunability of the dielectric constant at 30-85 K for x = 0.10. |
publisher |
TRANS TECH PUBLICATIONS LTD |
issn |
0255-5476 |
year published |
2006 |
volume |
514-516 |
beginning page |
240 |
ending page |
244 |
web of science category |
Materials Science, Multidisciplinary |
subject category |
Materials Science |
unique article identifier |
WOS:000238056400050
|