In this communication an attempt has been made to review, in brief, on Curie temperatures (Tc) of lead zirconatetitanate near morphotropical phase boundary. This review also includes 52/48 PZT modified by cadmium (Cd+2) in various amounts such as 5%, 10%, and 15%. We are proposing an easy method of selecting a substitution element for synthesizing modified lead zirconatetitanate (PZT) ceramics. Our investigation revealed that substitution of +3 valence elements will enhance Tc values whereas the substitution of +2 valence elements will decrease Tc. The change in Tc values is also attributed to ionic radii of modifier ions.