Piezoelectric properties of KNbO/sub 3/ in various crystal orientations by finite element analysis

Cut angles dependence of electromechanical coupling factors in various orientations of KNbO/sub 3/ single crystal were calculated by finite element analysis. These results were compared with direct calculations using piezoelectric equation and discussed with experimental results. The k11 in a bar was 0.76 at the /spl theta/ = 40.5/spl deg/ around Y axis (XYt)40.5/spl deg/. In a thin plate, kt was 0.72 at /spl theta/ =50/spl deg/ around Y axis (XYI)50/spl deg/.