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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 8
BKCSDE 23(8)
August 20, 2002 

The Seeding Effects on the Phase Transformation of Sol-Gel Derived PZT Powder
Hyun Tae Lee, Wan In Lee, Yoo Hang Kim, Chin Myung Whang
Seeding effect, PZT Powder, Sol-gel, Microstructure, Raman
The formation temperature for the perovskite lead zirconate titanate [Pb(Zr,Ti)O3, PZT] derived from sol-gel route was lowered by more than 100℃ with the addition of crystallographically suitable seed particles, such as barium titanate (BT) or PZT. We investigated the effect of seeding on the crystallization of perovskite phase and in the microstructure of the sol-gel derived PZT powder by varying the concentration, size and chemical species of seed particles. The phase transition as a function of temperature was monitored by DTA, XRD, and Raman spectroscopy, and the interface between the seed particle and grown PZT layer was analyzed by SEM and high resolution TEM techniques. It was found that both the heterogeneous and homogeneous nucleation contributes competitively in the formation of perovskite PZT grains.
1078 - 1084
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