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

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(In_1/2Nb_1/2)O₃-Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃, can be grown into single crystals, whose operable temperature range is limited by their rhombohedral-tetragonal phase transition temperatures (T_rt: 60~120 °C). Here, we develop a templated grain-growth approach to fabricat

SUBMITTER: Yang S 

PROVIDER: S-EPMC7977148 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature