Piezoelectric ceramic material include powder, block, plate, disc, ring, tube with silver , gold and nickel electrode. Typical values of piezoelectric ceramic materials Material typesS42S43S44S44-2S43AS44AS81PropertiesItemsP-42P-43FM-2-1SP-12-4P-8Coupling Coefficients(%)Kp65666866596058Kt48464847726846K3133 3435353330Piezoelectric Charge Constants (PC/N)d33320290330330300300250d31-155 -135-140- ...