Electrical Properties of 1-3 Piezocomposites Prepared from Textured KSr_2Nb_5O_(15) (KSN) Ceramic Fibers

摘要

Highly [001] textured KSr_2Nb_5O_(15) (KSN) ceramic fibers were fabricated by a combination of novel alginate gelation method and templated grain growth using acicular KSr_2Nb_5O_(15) template particles. Fibers were drawn from alginate based slurries without or with 10 wt% KSN template particles. A maximum texture fraction of 0.96 was obtained. Piezocomposites with 1-3 connectivity were prered from the KSN fibers and their electrical and electromechanical properties were investigated. Dielectric constant of 90, piezoelectric charge coefficient of 60 pC/N, remnant polarization of 10 μC/cm~2 and electric field induced strain of up to 0.036% were obtained from piezocomposites with textured fibers.