Processing and Ferroelectric Property of Lead-Free KBa2Nb5O15 Piezoceramics
Dense KBa2Nb5O15 ceramics have been first prepared from the accurate treatment of powder mixing under ordinary pressure-less sintering. The sample prepared by the calcined powder mixed by a planetary ball-milling showed a relatively high density of 94.7% and a homogeneous microstructure resulting from the inhibition of abnormal grain growth. The electric properties of KBa2Nb5O15 ceramics was controlled by the preferential crystallographic orientation. The remanent polarization (Pr) of the sample cut parallel to the pressing direction demonstrated above two times larger (2.9 μC/cm2) than that of the perpendicular-cut sample (1.3 μC/cm2) at 150°C.
Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang
T. Yoshifuji et al., "Processing and Ferroelectric Property of Lead-Free KBa2Nb5O15 Piezoceramics", Advanced Materials Research, Vols. 11-12, pp. 113-116, 2006