Crystal chemical and dielectric properties of Pb0.5(5-x)LaxNb5-xFexO15system with “tetragonal tungsten bronze” structural type

6533b830fe1ef96bd1296f81

RESEARCH PRODUCT

Crystal chemical and dielectric properties of Pb0.5(5-x)LaxNb5-xFexO15system with “tetragonal tungsten bronze” structural type

A. Benabad Brahim Elouadi Jean-claude Niepce M. Bouziane

subject

Permittivity Materials science General Physics and Astronomy Mineralogy chemistry.chemical_element Dielectric engineering.material Tungsten Ferroelectricity Crystallography Tetragonal crystal system chemistry engineering Curie temperature Bronze Chemical composition

description

The lanthanum-lead and iron-niobium coupled substitution in PbNb 2 O 6 have allowed to isolate new materials of a general formula Pb 0.5(5-x) La x Nb 5-x Fe x O 15 crystallising with the tetragonal tungsten bronze structural type. The resulting influence on the lattice parameters, the ferroelectric Curie temperature and Cole - Cole plots are presented. A typical ferroelectric - paraelectric behaviour occurs in the composition range 0 ≤ x ≤ 0.33 while, a relaxor behaviour is observed in the composition range 0.33 < x < 1.

year	journal	country	edition	language
2005-03-01	Journal de Physique IV (Proceedings)

https://doi.org/10.1051/jp4:2005123030

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