Piezoelectric performances of lead-reduced (1-x)(Bi{sub 0.9}La{sub 0.1})(Ga{sub 0.05}Fe{sub 0.95})O{sub 3}-x(Pb{sub 0.9}Ba{sub 0.1})TiO{sub 3} crystalline solutions in the morphotropic phase boundary
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200072 (China)
In this investigation, (1-x)(Bi{sub 0.9}La{sub 0.1})(Ga{sub 0.05}Fe{sub 0.95})O{sub 3}-x(Pb{sub 0.9}Ba{sub 0.1})TiO{sub 3}(BLGF= -PBT) crystalline solutions have been fabricated by using the solid-state reaction method. A ferroelectric rhombohedral/tetragonal morphotropic phase boundary (MPB) of (1-x)BLGF-xPBT was observed for x=0.4. In the vicinity of MPB, 0.6BLGF-0.4PBT revealed the maximum dielectric constant K and piezoelectric d{sub 33} constant of 1168 and 186 pC/N, respectively. The substitution of 10 at. % Ba for Pb dramatically increased K and d{sub 33} of (1-x)BLGF-xPBT relative to (1-x)BLGF-xPT at the same x content. The Curie temperature T{sub c} of (1-x)BLGF-xPBT was determined to be above 386 deg. C through the compositions investigated. The phase diagram of (1-x)BLGF-xPBT revealed a V-shaped relationship between T{sub c} and x content. The planar coupling coefficient K{sub p} was measured to be 0.37 for 0.6BLGF-0.4PBT, which was stable with increasing the measurement temperature until 170 deg. C. It is demonstrated that BLGF-PBT is a competitive alternative piezoelectric material, with the superior piezoelectricity and lead-reduced composition.
- OSTI ID:
- 20658108
- Journal Information:
- Journal of Applied Physics, Vol. 96, Issue 11; Other Information: DOI: 10.1063/1.1810633; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of Pb(Fe{sub 1/2}Nb{sub 1/2})O{sub 3} modification on dielectric and piezoelectric properties of Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-PbZr{sub 0.52}Ti{sub 0.48}O{sub 3} ceramics
The morphotropic phase boundary and dielectric properties of the xPb(Zr{sub 1/2}Ti{sub 1/2})O{sub 3}-(1-x)Pb(Ni{sub 1/3}Nb{sub 2/3})O{sub 3} perovskite solid solution