scholarly journals Pyrochlore to perovskite phase transformation in sol‐gel derived lead‐zirconate‐titanate thin films

1992 ◽  
Vol 60 (12) ◽  
pp. 1430-1432 ◽  
Author(s):  
Chi Kong Kwok ◽  
Seshu B. Desu
Keyword(s):  
Thin Films ◽  
Phase Transformation ◽  
Lead Zirconate Titanate ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Zirconate Titanate

Microstructural development in sol-gel derived lead zirconate titanate thin films: The role of precursor stoichiometry and processing environment

1996 ◽  
Vol 11 (8) ◽  
pp. 2076-2084 ◽  
Author(s):  
M. J. Lefevre ◽  
J. S. Speck ◽  
R. W. Schwartz ◽  
D. Dimos ◽  
S. J. Lockwood
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Lead Zirconate Titanate ◽  
Single Phase ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Microstructural Development ◽  
Zirconate Titanate

The role of precursor stoichiometry and local firing environment on the microstructural development of sol-gel derived lead zirconate titanate (PZT) thin films was investigated. Typically, excess Pb is added to films to compensate for PbO volatilization during heat treatment. Here, it is shown that the use of stoichiometric precursors with either a PbO atmosphere powder or a PbO overcoat during the crystallization heat treatment is an attractive and viable alternative method for control of film stoichiometry. Using these approaches, we have fabricated single phase perovskite thin films with microstructures and electrical properties (Pr ∼ 36 μC/cm2 and Ec ∼ 45 kV /cm) comparable to those of films using optimized solution chemistries and excess Pb additions. The potential advantage of increasing PbO partial pressure, or activity, during firing versus excess Pb additions is discussed from the standpoint of a proposed crystallization scenario based on the kinetic competition between Pb loss and the nucleation and growth rates of the perovskite phase.

Phase transformations in rapid thermal processed lead zirconate titanate

1995 ◽  
Vol 10 (12) ◽  
pp. 3149-3159 ◽  
Author(s):  
Ellen M. Griswold ◽  
L. Weaver ◽  
M. Sayer ◽  
I.D. Calder
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Pyrochlore Phase ◽  
Lead Zirconate ◽  
Grain Structure ◽  
Avrami Model ◽  
Pzt Thin Films ◽  
Zirconate Titanate

The crystallization kinetics of the pyrochlore to perovskite phase transformation in lead zirconate titanate (PZT) thin films have been analyzed using rapid thermal processing (RTP). Sol-gel PZT thin films, fabricated on platinum electrodes, were annealed at 550 °C to 650 °C with hold times ranging from 1 s to 5 min. Glancing angle x-ray diffraction (XRD) was used for depth profiling to identify the location of phases in the films. Transmission electron microscopy (TEM) provided information on grain structure, nucleation, and growth. The phase information was correlated to the ferroelectric and dielectric properties. The perovskite phase nucleated in the pyrochlore phase throughout the film thickness, and at 650 °C the transformation was complete in 15 s. Fast growing (100) PZT nucleated at the platinum and consumed a small-grained matrix until a columnar structure was obtained. A ramp rate of 100 °C/s was sufficiently fast to prevent transformation during heating and allowed the direct application of an Avrami model for transformation kinetics. An activation energy of 610 kJ/mol was determined.

Early Stages of Crystallization of Sol−Gel-Derived Lead Zirconate Titanate Thin Films

2003 ◽  
Vol 15 (5) ◽  
pp. 1147-1155 ◽  
Author(s):  
A. Wu ◽  
P. M. Vilarinho ◽  
I. Reaney ◽  
I. M. Miranda Salvado
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Early Stages ◽  
Zirconate Titanate

scholarly journals Interfacial mechanisms controlling phase formation in sol-gel derived lead zirconate titanate thin films

1994 ◽  
Vol 17 (6) ◽  
pp. 1005-1014 ◽  
Author(s):  
S B Majumder ◽  
V N Kulkarni ◽  
Y N Mohapatra ◽  
D C Agrawal
Keyword(s):  
Thin Films ◽  
Phase Formation ◽  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Zirconate Titanate

Densification and enhanced polarisation in lead zirconate titanate sol–gel thin films

2009 ◽  
Vol 113 (1) ◽  
pp. 135-139 ◽  
Author(s):  
Anirban Chowdhury ◽  
Mikael A. Khan ◽  
Craig James ◽  
Steven J. Milne
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Zirconate Titanate

Low temperature formation of sol-gel derived ferroelectric lead zirconate titanate (Pb(ZrxTi1-x)O3, x = 0.3) thin films

1998 ◽  
Vol 08 (PR9) ◽  
pp. Pr9-79-Pr9-82 ◽  
Author(s):  
Q. Zhang ◽  
R. W. Whatmore ◽  
Z. Huang ◽  
M. E. Vickers
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Zirconate Titanate

Characterization of seeded sol–Gel lead zirconate titanate thin films

1999 ◽  
Vol 19 (6-7) ◽  
pp. 1403-1407 ◽  
Author(s):  
Aiying Wu ◽  
Paula M. Vilarinho ◽  
Isabel M.Miranda Salvado ◽  
João L. Baptista ◽  
C.M. de Jesus ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Zirconate Titanate
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