Investigation of bismuth-based perovskite system: (1-x)Bi(Ni{sub 2/3}Nb{sub 1/3})O{sub 3}-xPbTiO{sub 3}

Journal Article · Mon Aug 01 04:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1991969· OSTI ID:20714027

Shujun, Zhang; Stringer, Craig; Ru, Xia; Choi, S -M; Randall, Clive A; Shrout, Thomas R ^[1]

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1. Material Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

The dielectric and piezoelectric properties for bismuth-based perovskite system (1-x)Bi(Ni{sub 2/3}Nb{sub 1/3})O{sub 3}-xPbTiO{sub 3} (BNN-PT100x) with x=0.6-0.95 were investigated. High-density polycrystalline ceramics were fabricated using a conventional solid-state reaction method. Morphotropic phase boundary (MPB) at x=0.625-0.65 composition was observed by x-ray-diffraction measurements, separating rhombohedral and tetragonal phases. Analogous to Pb(ZrTi)O{sub 3} ceramic, enhanced dielectric and piezoelectric activities were associated with the composition near the MPB. The dielectric constant (K{sub 33}{sup T}) and piezoelectric coefficient (d{sub 33}) for BNN-PT65 composition were found to be 1100 and 140 pC/N, respectively, with a Curie temperature (T{sub c}) around 273 deg. C. The addition of manganese (Mn) resulted in lowering the dielectric loss and increasing the mechanical quality factor Q when compared with the pure counterpart. The coercive field was found to increase to 30.7 kV/cm when BNN-PT65 was modified with magnesium (Mg). These results demonstrate the BNN-PT system to be a competitive piezoelectric material with a reduced lead content.

• OSTI ID: 20714027
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 98; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CERAMICS
COERCIVE FORCE
CURIE POINT
DENSITY
DIELECTRIC MATERIALS
LEAD
LEAD COMPOUNDS
MAGNESIUM
MANGANESE
NICKEL COMPOUNDS
NIOBIUM COMPOUNDS
PERMITTIVITY
PEROVSKITE
PIEZOELECTRICITY
POLYCRYSTALS
QUALITY FACTOR
TEMPERATURE RANGE 0400-1000 K
TITANATES
X-RAY DIFFRACTION