PHASE-TRANSITION AND DIELECTRIC CHARACTERISTICS OF TUNGSTEN BRONZE RELAXORS

Authors
POVOA JM MOREIRA EN GARCIA D SPINOLA DUP DOCARMO CGV EIRAS JA
Citation
Jm. Povoa et al., PHASE-TRANSITION AND DIELECTRIC CHARACTERISTICS OF TUNGSTEN BRONZE RELAXORS, Journal of the Korean Physical Society, 32, 1998, pp. 1046-1047
Citations number
5
Categorie Soggetti
Physics
Journal title
Journal of the Korean Physical Society → ACNP
ISSN journal
03744884
Volume
32
Year of publication
1998
Part
3
Supplement
S
Pages
1046 - 1047
Database
ISI
SICI code
0374-4884(1998)32:<1046:PADCOT>2.0.ZU;2-C
Abstract
Niobates of tungsten bronze type structure, as (Pb,Ba)Nb2O6 and (Sr,Ba )Nb2O6, were investigated by impedance spectroscopy as function of tem perature. The samples were synthesized by conventional ceramic process ing (mixed oxides and firing) over optimized conditions. The results s howed complex dielectric behavior of both compounds. Relaxation parame ters were obtained using a Vogel-Fulcher relation.