AC field induced polarization disordering in the ferroelectric phase of modified PZT ceramics

Book · Wed Dec 30 23:00:00 EST 1998

OSTI ID:323466

Tan, Q; Viehland, D ^[1]

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1. Univ. of Illinois, Urbana, IL (United States). Dept. of Materials Science and Engineering

Pronounced nonlinear enhancements in dielectric responses and decreases in phase transformation temperatures were induced under moderate ac fields and high field cycling for La modified lead zirconate titanate (PZT) ceramics. Polarization disordering could be inhibited by introducing acceptor dopants into La modified PZT compositions and by DC bias field. Analysis of the frequency dispersion revealed that the field driven transformation in lower La content PZT is a field assisted activation process, while the transformation in higher La content PZT relaxers is intrinsically a thermal activated process.

• Sponsoring Organization: Office of Naval Research, Washington, DC (United States)
• OSTI ID: 323466
• Report Number(s): CONF-971201--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DIELECTRIC PROPERTIES
ELECTRIC FIELDS
EXPERIMENTAL DATA
LANTHANUM OXIDES
LEAD OXIDES
ORDER PARAMETERS
PHASE STUDIES
POTASSIUM OXIDES
TITANIUM OXIDES
ZIRCONIUM OXIDES