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Influence of MnO2 doping on the dielectric and piezoelectric properties and the domain structure in (K0.5Na0.5)NbO 3 single crystals

Journal Article


Abstract


  • MnO2-doped (K0.5Na0.5)NbO3 (KNN) single crystals were grown by high-temperature solution method using K2CO3-Na2CO3 eutectic composition as flux. The effect of the manganese dopant on the dielectric, piezoelectric properties and the domain structure was investigated. The MnO2-doped KNN crystals were found to exhibit higher piezoelectric coefficient d 33 and dielectric permittivity εr when compared with pure KNN crystal, being on the order of 270 pC/N and 730, respectively, for manganese-doped level at 0.5 mol%, with slightly reduced orthorhombic to tetragonal phase transition TO - T, and Curie temperature T C, being on the order of 193° and 416°C, respectively. The domain size of [001]-oriented KNN-Mn crystal was found to be on the order of 5-13 μm at room temperature, smaller than that of the domain size observed in the pure KNN crystal (20-30 μm). The thermal depoling experiments were performed on the [001]-poled KNN-Mn crystals, where the partial depolarization was found to occur at temperatures above 200°C, due to the phase transformation. © 2009 The American Ceramic Society.

Publication Date


  • 2010

Citation


  • Lin, D., Li, Z., Zhang, S., Xu, Z., & Yao, X. (2010). Influence of MnO2 doping on the dielectric and piezoelectric properties and the domain structure in (K0.5Na0.5)NbO 3 single crystals. Journal of the American Ceramic Society, 93(4), 941-944. doi:10.1111/j.1551-2916.2009.03501.x

Scopus Eid


  • 2-s2.0-77950502653

Start Page


  • 941

End Page


  • 944

Volume


  • 93

Issue


  • 4

Abstract


  • MnO2-doped (K0.5Na0.5)NbO3 (KNN) single crystals were grown by high-temperature solution method using K2CO3-Na2CO3 eutectic composition as flux. The effect of the manganese dopant on the dielectric, piezoelectric properties and the domain structure was investigated. The MnO2-doped KNN crystals were found to exhibit higher piezoelectric coefficient d 33 and dielectric permittivity εr when compared with pure KNN crystal, being on the order of 270 pC/N and 730, respectively, for manganese-doped level at 0.5 mol%, with slightly reduced orthorhombic to tetragonal phase transition TO - T, and Curie temperature T C, being on the order of 193° and 416°C, respectively. The domain size of [001]-oriented KNN-Mn crystal was found to be on the order of 5-13 μm at room temperature, smaller than that of the domain size observed in the pure KNN crystal (20-30 μm). The thermal depoling experiments were performed on the [001]-poled KNN-Mn crystals, where the partial depolarization was found to occur at temperatures above 200°C, due to the phase transformation. © 2009 The American Ceramic Society.

Publication Date


  • 2010

Citation


  • Lin, D., Li, Z., Zhang, S., Xu, Z., & Yao, X. (2010). Influence of MnO2 doping on the dielectric and piezoelectric properties and the domain structure in (K0.5Na0.5)NbO 3 single crystals. Journal of the American Ceramic Society, 93(4), 941-944. doi:10.1111/j.1551-2916.2009.03501.x

Scopus Eid


  • 2-s2.0-77950502653

Start Page


  • 941

End Page


  • 944

Volume


  • 93

Issue


  • 4