Accession Number:

ADA429649

Title:

Compositional Dependence of Electromechanical Behavior of Ba,Zr-Codoped Sodium Bismuth Titanate

Descriptive Note:

Briefing charts

Corporate Author:

LEHIGH UNIV BETHLEHEM PA

Personal Author(s):

• Soukhojak, Andrey N.
• Chiang, Yet-Ming

Report Date:

2003-06-17

Pagination or Media Count:

26.0

Abstract:

BNBZT systems offer rich possibilities for lead-free ferroelectrics with high electromechanical properties. The peak of electromechanical response has been found at the composition z2b7. Compositional dependence of ferroelectric phase stability in the BNBZT system has been mapped by means of a free energy expansion in terms of polarization with coefficients obtained by fitting of the predicted to the observed hysteresis loops. Nanodomain relaxation as a mechanism of frequency dependent electromechanical response of BNBZT has been supported by microscopic observations.

Descriptors:

• *ELECTROMECHANICAL DEVICES
• *BARIUM
• *ZIRCONIUM OXIDES
• *FERROELECTRICITY
• *SODIUM COMPOUNDS
• *BISMUTH TITANATE
• POLARIZATION
• COEFFICIENTS
• RELAXATION
• DOPING
• HYSTERESIS
• POLYCRYSTALLINE
• NANOTECHNOLOGY
• NANOSTRUCTURES

Subject Categories:

• Inorganic Chemistry
• Non-electrical Energy Conversion
• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE