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Textured ferroelectric ceramics with high electromechanical coupling factors over a broad temperature range

Journal Article


Abstract


  • The figure-of-merits of ferroelectrics for transducer applications are their electromechanical coupling factor and the operable temperature range. Relaxor-PbTiO3 ferroelectric crystals show a much improved electromechanical coupling factor k33 (88~93%) compared to their ceramic counterparts (65~78%) by taking advantage of the strong anisotropy of crystals. However, only a few relaxor-PbTiO3 systems, for example Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3, can be grown into single crystals, whose operable temperature range is limited by their rhombohedral-tetragonal phase transition temperatures (Trt: 60~120 °C). Here, we develop a templated grain-growth approach to fabricate <001>-textured Pb(In1/2Nb1/2)O3-Pb(Sc1/2Nb1/2)O3-PbTiO3 (PIN-PSN-PT) ceramics that contain a large amount of the refractory component Sc2O3, which has the ability to increase the Trt of the system. The high k33 of 85~89% and the greatly increased Trt of 160~200 °C are simultaneously achieved in the textured PIN-PSN-PT ceramics. The above merits will make textured PIN-PSN-PT ceramics an alternative to single crystals, benefiting the development of numerous advanced piezoelectric devices.

Publication Date


  • 2021

Citation


  • Yang, S., Li, J., Liu, Y., Wang, M., Qiao, L., Gao, X., . . . Li, F. (2021). Textured ferroelectric ceramics with high electromechanical coupling factors over a broad temperature range. Nature Communications, 12(1). doi:10.1038/s41467-021-21673-8

Scopus Eid


  • 2-s2.0-85101907433

Web Of Science Accession Number


Volume


  • 12

Issue


  • 1

Abstract


  • The figure-of-merits of ferroelectrics for transducer applications are their electromechanical coupling factor and the operable temperature range. Relaxor-PbTiO3 ferroelectric crystals show a much improved electromechanical coupling factor k33 (88~93%) compared to their ceramic counterparts (65~78%) by taking advantage of the strong anisotropy of crystals. However, only a few relaxor-PbTiO3 systems, for example Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3, can be grown into single crystals, whose operable temperature range is limited by their rhombohedral-tetragonal phase transition temperatures (Trt: 60~120 °C). Here, we develop a templated grain-growth approach to fabricate <001>-textured Pb(In1/2Nb1/2)O3-Pb(Sc1/2Nb1/2)O3-PbTiO3 (PIN-PSN-PT) ceramics that contain a large amount of the refractory component Sc2O3, which has the ability to increase the Trt of the system. The high k33 of 85~89% and the greatly increased Trt of 160~200 °C are simultaneously achieved in the textured PIN-PSN-PT ceramics. The above merits will make textured PIN-PSN-PT ceramics an alternative to single crystals, benefiting the development of numerous advanced piezoelectric devices.

Publication Date


  • 2021

Citation


  • Yang, S., Li, J., Liu, Y., Wang, M., Qiao, L., Gao, X., . . . Li, F. (2021). Textured ferroelectric ceramics with high electromechanical coupling factors over a broad temperature range. Nature Communications, 12(1). doi:10.1038/s41467-021-21673-8

Scopus Eid


  • 2-s2.0-85101907433

Web Of Science Accession Number


Volume


  • 12

Issue


  • 1