Ferroelectric phase transition in Ba5RTi3Nb7O30 [R = Nd, Eu, Gd] ceramics

Authors
Choudhary, RNP Shannigrahi, SR Singh, AK
Citation
Rnp. Choudhary et al., Ferroelectric phase transition in Ba5RTi3Nb7O30 [R = Nd, Eu, Gd] ceramics, B MATER SCI, 22(6), 1999, pp. 975-979
Citations number
21
Categorie Soggetti
Material Science & Engineering
Journal title
BULLETIN OF MATERIALS SCIENCE
ISSN journal
02504707 → ACNP
Volume
22
Issue
6
Year of publication
1999
Pages
975 - 979
Database
ISI
SICI code
0250-4707(199910)22:6<975:FPTIB[>2.0.ZU;2-Q
Abstract
Polycrystalline samples of Ba5RTi3Nb7O30 [R = Nd, Eu, Gd], were prepared us ing high-temperature solid-state reaction technique. Preliminary X-ray stru ctural analysis of the compounds shows the formation of single phase compou nds (orthorhombic crystal system) at room temperature. Detailed studies of dielectric properties (epsilon, tan delta, sigma) as a function of frequenc y (400 Hz to 10 kHz) and temperature (30 degrees to 380 degrees C) show tha t these compounds exhibit diffuse ferroelectric phase transition.