An incommensurate-commensurate phase transformation in antiferroelectric tin-modified lead zirconate titanate

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Journal of Materials Research; (United States)

DOI:https://doi.org/10.1557/JMR.1995.0453· OSTI ID:6661473

Xu, Z; Viehland, D; Payne, D A ^[1]

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1. Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

Antiferroelectric tin-modified lead zirconate titanate ceramics (PZST), with 42 at. % Sn and 4 at. % Ti, were studied by hot- and cold-stage transmission electron microscopy and selected area electron diffraction techniques. The previously reported tetragonal antiferroelectric state is shown to be an incommensurate orthorhombic state. Observations revealed the existence of incommensurate 1/[ital x][l angle]110[r angle] superlattice reflections below the temperature of the dielectric maximum. The modulation wavelength for this incommensurate structure was found to be metastably locked-in near and below room temperature. An incommensurate-commensurate orthorhombic antiferroelectric transformation was then observed at lower temperatures. However, an intermediate condition was observed over a relatively wide temperature range which was characterized by an intergrowth of [l angle]110[r angle] structural modulations, which was strongly diffuse along the [l angle]110[r angle]. These structural observations were correlated with dispersion in the dielectric properties in the same temperature range. No previous reports of an incommensurate orthorhombic antiferroelectric state or an incommensurate-commensurate orthorhombic antiferroelectric transformation are know to exist.

• DOE Contract Number: AC02-76ER01198
• OSTI ID: 6661473
• Journal Information: Journal of Materials Research; (United States), Vol. 10:2; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PZT
CRYSTAL-PHASE TRANSFORMATIONS
DIELECTRIC PROPERTIES
ANTIFERROELECTRIC MATERIALS
ELECTRON DIFFRACTION
TIN ADDITIONS
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
COHERENT SCATTERING
DIELECTRIC MATERIALS
DIFFRACTION
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
LEAD COMPOUNDS
MATERIALS
MICROSCOPY
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SCATTERING
TIN ALLOYS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS
360602* - Other Materials- Structure & Phase Studies