SYNTHESIS OF PLZT POWDERS VIA A MOLECULARLY MODIFIED PRECURSOR ROUTE

A new aqueous metallo-organic precursor, namely, lead lanthanum zircon yl titanyl oxalate (PLZTO) has been developed using complexes of Pb2+, La3+, Zr4+ and Ti4+ with required stoichiometry. Controlled pyrolysis of the PLZTO precursor at sufficiently low temperatures (T almost-equ al-to 525-degrees-C) in air resulted in cubic powders of lead lanthanu m zirconate titanate (PLZT). Thermal analysis (DTA/TG/DTG), X-ray diff raction (XRD), micro- and chemical analysis, X-ray fluorescence (XRF) and IR studies were used to characterize the precursor and resulting P LZT powder. The dielectric (K, tan delta) and ferroelectric (P(s), E(c )) properties of the sintered compacts were measured at room temperatu re.