  Even though standard method to determine physical parameters of piezoelectric
materials has been set up for several decades, bare attention has been made on
loss determination method. Furthermore, several deficits have been recognized
in the standard method for k33 mode. In this study, detailed discussion on
deficits of IEEE Standard k33 is investigated and the method to resolve such
deficits will be introduced. The standard k33 specimen suffers from small
capacitance, which causes huge experimental error, intrinsic electrical energy
leakage, specimen setup issue and inability to directly determine intensive
elastic properties. In order to resolve these issues, partial electrode method
was introduced, and curve fitting was demonstrated to determine physical
parameters and losses.
