Morphotropic NaNbO{sub 3}-BaTiO{sub 3}-CaZrO{sub 3} lead-free ceramics with temperature-insensitive piezoelectric properties

Journal Article · Mon Jul 11 04:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4958937· OSTI ID:22590569

Zuo, Ruzhong; Qi, He; Fu, Jian ^[1]

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1. Institute of Electro Ceramics and Devices, School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009 (China)

A morphotropic NaNbO{sub 3}-based lead-free ceramic was reported to have temperature-insensitive piezoelectric and electromechanical properties (d{sub 33} = 231 pC/N, k{sub p} = 35%, T{sub c} = 148 °C, and low-hysteresis strain ∼0.15%) in a relatively wide temperature range. This was fundamentally ascribed to the finding of a composition-axis vertical morphotropic phase boundary in which coexisting ferroelectric phases are only compositionally driven and thermally insensitive. Both phase coexistence and nano-scaled domain morphology deserved well enhanced electrical properties, as evidenced by means of synchrotron x-ray diffraction and transmission electron microscopy. Our study suggests that the current lead-free ceramic would be a very promising piezoelectric material for actuator and sensor applications.

• OSTI ID: 22590569
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 109; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
LEAD
MORPHOLOGY
PIEZOELECTRICITY
SENSORS
STRAINS
SYNCHROTRON RADIATION
TEMPERATURE RANGE 0400-1000 K
TITANATES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION