Ferroelectric properties of pyrochlore-structure PbBiZrNbO/sub 7/

Journal Article · Tue Dec 31 23:00:00 EST 1974 · Bull. Acad. Sci. USSR, Phys. Ser.; (United States)

OSTI ID:7273579

Belyaev, I N; Fesenko, E G; Peresun'ko, A F; Chernev, Ya E

Lead-bearing quaternary oxides with the pychlore structure were examined; in three of these (PbBiTiNbO/sub 7/,PbDyTiNbO/sub 7/, and PbBiZrNbO/sub 7/) there are peaks on the temperature dependence of the dielectric constant. These compounds lie at the center of the PbO--A/sub 2/O/sub 3/--BO/sub 2/--Nb/sub 2/O/sub 5/ tetrahedra (where A = Bi, Dy; B = Ti, Zr). X-ray phase and dta studies of sections in the system go with examination of single crystals to indicate that distinct compounds are produced, not solid solutions based on simple A/sub 2/B/sub 2/O/sub 7/ pyrochlores or pyrochlore-type A/sub 3/BO/sub 7/ compositions (with A = Pb, Bi, Dy; B = Nb, Ti, Zr). All the compounds had the cubic pyrochlore cell, while PbBiZrNbO/sub 7/ showed a small tetragonal distortion (c/a = 1,005); the unit-cell parameters and distortion type were determined using a TuR M62 diffractometer made by Zeiss in Eastern Germany. The synthesis temperatures and sintering temperatures are given in a table together with x-ray and dielectric data.

• Research Organization: Rostov State Univ., USSR
• OSTI ID: 7273579
• Journal Information: Bull. Acad. Sci. USSR, Phys. Ser.; (United States), Journal Name: Bull. Acad. Sci. USSR, Phys. Ser.; (United States) Vol. 39:5; ISSN BUPSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BISMUTH COMPOUNDS
CRYSTAL STRUCTURE
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DYSPROSIUM COMPOUNDS
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
LEAD COMPOUNDS
MATERIALS
NIOBATES
NIOBIUM COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS