Investigation of high Curie temperature (1-x)BiSc{sub 1-y}Fe{sub y}O{sub 3}-xPbTiO{sub 3} piezoelectric ceramics

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3253585· OSTI ID:21361890

Sterianou, I; Sinclair, D C; Reaney, I M ^[1]; Comyn, T P; Bell, A J ^[2]

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1. Department of Engineering Materials, The University of Sheffield, Sheffield S1 3JD (United Kingdom)
2. Institute for Materials Research, University of Leeds, Leeds LS2 9JT (United Kingdom)

Ceramics around the morphotropic phase boundary (MPB) in the (1-x)BiSc{sub 1-y}Fe{sub y}O{sub 3}-xPbTiO{sub 3} solid solution were fabricated. For y=0.5, ceramics were single phase, and piezoelectric coefficients (d{sub 33}) and electromechanical coupling coefficients (k{sub p}) for MPB compositions were 300 pC/N and 0.49, respectively; a level of piezoelectric activity similar to that of hard, lead zirconate titanate compositions but with T{sub C}approx60 deg. C higher at approx440 deg. C. For ceramics with y>=0.7, dielectric measurements in combination with diffraction contrast transmission electron microscopy revealed the existence of two ferroelectric phases for most PbTiO{sub 3} contents studied. The presence of two ferroelectric phases was associated with a decrease in piezoelectric activity and although raw materials costs for y=0.7 and 0.8 with respect to y=0 were significantly lower (less Sc{sub 2}O{sub 3}) and T{sub C} greater (approx500 deg. C), d{sub 33} (approx100 pC/N) and k{sub p} (0.18) were too low to be commercially useful for actuator applications.

• OSTI ID: 21361890
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 106; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CERAMICS
CHALCOGENIDES
COHERENT SCATTERING
CURIE POINT
DIELECTRIC MATERIALS
DIFFRACTION
DISPERSIONS
ELECTRICITY
ELECTRON MICROSCOPY
FERROELECTRIC MATERIALS
HOMOGENEOUS MIXTURES
LEAD COMPOUNDS
MATERIALS
MICROSCOPY
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PIEZOELECTRICITY
PZT
RAW MATERIALS
SCANDIUM COMPOUNDS
SCANDIUM OXIDES
SCATTERING
SOLID SOLUTIONS
SOLUTIONS
THERMODYNAMIC PROPERTIES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONATES
ZIRCONIUM COMPOUNDS