Microstructure-property relations in tungsten bronze lead barium niobate, Pb sub 1 minus sub x Ba sub x Nb sub 2 O sub 6

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Journal of Materials Research; (United States)

DOI:https://doi.org/10.1557/JMR.1991.1720· OSTI ID:5471139

Randall, C A; Guo, R; Bhalla, A S; Cross, L E ^[1]

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1. The Pennsylvania State University, Materials Research Laboratory, University Park, Pennsylvania (USA)

Transmission electron microscopy (TEM) has been used to explore details of the structural phase transitions and corresponding microstructural features in the solid solution of Pb{sub 1{minus}{ital x}}Ba{sub {ital x}}Nb{sub 2}O{sub 6}(PBN) tungsten bronze ferroelectrics at compositions embracing the morphotropic phase boundary between orthorhombic and tetragonal ferroelectric phases. In addition to the ferroelectric domain structures that were consistent with the expected symmetries, incommensurate ferroelastic phases were observed. The onset'' and lock-in'' transition temperatures are a function of the Pb/Ba ratio, and for lead-rich compositions it appears that the incommensurate distortion may occur above the ferroelectric Curie temperature in the paraelectric phase.

• OSTI ID: 5471139
• Journal Information: Journal of Materials Research; (United States), Vol. 6:8; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
LEAD OXIDES
NIOBIUM OXIDES
CURIE POINT
DOMAIN STRUCTURE
FERROELECTRIC MATERIALS
MICROSTRUCTURE
ORTHORHOMBIC LATTICES
QUATERNARY COMPOUNDS
SOLID SOLUTIONS
TETRAGONAL LATTICES
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DISPERSIONS
ELECTRON MICROSCOPY
LEAD COMPOUNDS
MICROSCOPY
MIXTURES
NIOBIUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SOLUTIONS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies