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Research paper thumbnail of Enhanced piezoelectric and ferroelectric properties in the BaZrO 3 substituted BiFeO 3 - PbTiO 3

BiFeO 3 -PbTiO 3 (BF-PT) compounds possess very high Curie temperature and tetragonality compared... more BiFeO 3 -PbTiO 3 (BF-PT) compounds possess very high Curie temperature and tetragonality compared to other PbTiO 3 -based piezoceramics. The BaZrO 3 (BZ), with weakly ferroelectric active cations, was introduced into the BiFeO 3 -PbTiO 3 to reduce the tetragonality (c/a) and improve the piezoelectric property. For the (0.8-x)BiFeO 3 -0.2BaZrO 3 -xPbTiO 3 , the BaZrO 3 substitution can effectively decrease the tetragonality (c/a) from 1.18 to 1.02 for those compositions near the morphotropic phase boundary. The piezoelectric property of BiFeO 3 -PbTiO 3 can be much enhanced with an optimal piezoelectric constant $270 pC/N with a reduced T C of 270 C. Both the temperature dependent dielectric properties and polarization loops verified the existence of antiferroelectric relaxor, which was not observed in previous reported BiFeO 3 -PbTiO 3 based materials. V C 2013 American Institute of Physics. [http://dx.

Research paper thumbnail of Enhanced piezoelectric and ferroelectric properties in the BaZrO 3 substituted BiFeO 3 - PbTiO 3

BiFeO 3 -PbTiO 3 (BF-PT) compounds possess very high Curie temperature and tetragonality compared... more BiFeO 3 -PbTiO 3 (BF-PT) compounds possess very high Curie temperature and tetragonality compared to other PbTiO 3 -based piezoceramics. The BaZrO 3 (BZ), with weakly ferroelectric active cations, was introduced into the BiFeO 3 -PbTiO 3 to reduce the tetragonality (c/a) and improve the piezoelectric property. For the (0.8-x)BiFeO 3 -0.2BaZrO 3 -xPbTiO 3 , the BaZrO 3 substitution can effectively decrease the tetragonality (c/a) from 1.18 to 1.02 for those compositions near the morphotropic phase boundary. The piezoelectric property of BiFeO 3 -PbTiO 3 can be much enhanced with an optimal piezoelectric constant $270 pC/N with a reduced T C of 270 C. Both the temperature dependent dielectric properties and polarization loops verified the existence of antiferroelectric relaxor, which was not observed in previous reported BiFeO 3 -PbTiO 3 based materials. V C 2013 American Institute of Physics. [http://dx.

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