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Titre du document / Document title

Constante dieléctrica, expansión térmica y difracción de neutrones en la transición FRL-FRH del PbZr1−xTixO3 = Dielectric constant, thermal expansion and neutron powder diffraction of FRL-FRH transition of PbZr1-xTixO3

Auteur(s) / Author(s)

NOHEDA B. (1) ; IGLESIAS T. (1) ; CERECEDA N. (1) ; GONZALO J. A. (1) ; DE FRUTOS J. ; COX D. E. ; SHIRANE G. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Departamento de Física de Materiales, C-IV. Universidad Autónoma, 28049 Madrid, ESPAGNE

Résumé / Abstract

Dielectric constant, thermal expansion and neutron powder diffraction data have been collected in order to characterize the FRL-FRH transition of a Nb-doped PZT sample with the composition Pb1-y/2(Zr1-xTix)1-yNbyO3 (x=0.035, y=0.039). Neutron data for the first few diffraction peaks were obtained in the temperature range 270≤T≤350 K at temperature intervals of 10 K in order to make a detailed study of the FRL-FRH transition, which takes place for this composition at TLH323 K. The temperature dependence of the Pb and Zr/Ti atomic shifts, and the rotation and distortion of the oxygen octahedra through the transition was derived. The results are compared with published data for PZT with x=0.10, and indicate that (a) the change in Zr/Ti shift through TLH becomes more pronounced, and (b) the tilt of the oxygen octahedra below TLH becomes more important for x= 0.035 than for x=0.10. It has been pointed out that the increment in the variation of the spontaneous polarization through TLH with higher Zr amounts, is due mainly to the increase of the Zr/Ti(Nb) displacement in the low temperature rhombohedral phase.

Revue / Journal Title

Boletín de la Sociedad Española de Cerámica y Vidrio    ISSN  0366-3175   CODEN BSCVB9 

Source / Source

Congrès
ReuniÓn nacional de Electrocerámica No2, Aranjuez, Madrid , ESPAGNE (22/06/1995)
1995, vol. 34, no 5-6, pp. 263-503 (11 ref.), pp. 277-280

Langue / Language

Espagnol

Revue : Espagnol ; Anglais

Editeur / Publisher

Sociedad Española de Cerámica y Vidrio, Madrid, ESPAGNE  (1972) (Revue)

Mots-clés anglais / English Keywords

Experimental study

;

Permittivity

;

Thermal expansion

;

Neutron diffraction

;

Phase transformations

;

Doped materials

;

Niobium additions

;

PZT

;

Ceramics

;

Lead oxides

;

Zirconium oxides

;

Titanium oxides

;

Transition element compounds

;

Inorganic compounds

;

Mots-clés français / French Keywords

Etude expérimentale

;

Constante diélectrique

;

Dilatation thermique

;

Diffraction neutron

;

Transformation phase

;

Matériau dopé

;

Addition niobium

;

PZT

;

Céramique

;

Plomb oxyde

;

Zirconium oxyde

;

Titane oxyde

;

PbZr1-xTixO3:Nb

;

O Pb Ti Zr

;

Métal transition composé

;

Composé minéral

;

Localisation / Location

INIST-CNRS, Cote INIST : 10399, 35400004501806.0030

Nº notice refdoc (ud4) : 3050406



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