Convergent-beam electron diffraction studies of domains in Rhombohedral phase of lead zirconate titanate ceramics

Conference · Wed Jul 01 00:00:00 EDT 1987

OSTI ID:5411752

Dass, M L.A.; Thomas, G

Lead zirconate titanate Pb(Zr{sub x}Ti{sub 1-x})O{sub 3} (PZT) ceramics are ferroelectrics formed as solid solutions between PbTiO{sub 3} and PbZrO{sub 3}. Among the different phases in the ferroelectric state, the primary ones are the Ti{sup +} rich tetragonal (T) phase and the Zr{sup +4} rich rhombohedral (R) phase and the phase boundary between them (x {approx} 0.53). A net polarization for the piezoelectric activity is obtained under an applied field whereby the polarization vectors of individual grains reorient and this process is called poling. The boundary composition is of great technological importance owing to the high piezo eletric activity. It is suggested, that the excellent piezo electric property is due to the coexistence of both the T and R phases which favours easy poling. Domain types in the R phase of PZT ceramic have been identified using the CBED method. However, the fringe contrast at the domain boundaries indicate that the domain walls are inclined. The orientation relation of domain walls is being studied by conventional microscopy contrast and diffraction techniques. 4 refs., 4 figs.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5411752
• Report Number(s): LBL-23055; CONF-8708368-1; ON: DE91016433
• Resource Relation: Conference: Annual meeting of the Electron Microscope Society of America (EMSA)-Microbeam Analysis Society (MAS), Albuquerque, NM (United States), 15 Aug 1987
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PZT
MICROSTRUCTURE
PHASE STUDIES
CERAMICS
ELECTRON DIFFRACTION
TETRAGONAL LATTICES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
LEAD COMPOUNDS
OXYGEN COMPOUNDS
SCATTERING
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies