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Title The pyrochlore-to-perovskite transformation in solution-derived lead zirconate titanate thin films
Creator/Author Voigt, J.A. ; Tuttle, B.A. ; Headley, T.J. ; Lamppa, D.L.
Publication Date1995 May 01
OSTI IdentifierOSTI ID: 48692 ; DE95010453
Report Number(s)SAND--95-0735C; CONF-941267--1
DOE Contract NumberAC04-94AL85000
Resource TypeConference
Resource Relation4. Material Research Society-Ferroelectric thin films conference, Boston, MA (United States), 5-9 Dec 1994 ; PBD:[1995]
Research OrgSandia National Labs., Albuquerque, NM (United States)
Sponsoring OrgUSDOE, Washington, DC (United States)
Subject36 MATERIALS SCIENCE ; PZT; PHASE TRANSFORMATIONS; THIN FILMS; MAGNESIUM OXIDES; POROSITY
Description/Abstract The authors have characterized the pyrochlore-to-perovskite crystallization process in solution-derived Pb(Zr{sub 0.20}Ti{sub 0.80})O{sub 3} thin films on (100) MgO single crystal substrates. It has been determined that the perovskite phase nucleated preferentially at the film/MgO interface out of a nanocrystalline ({approx}100{angstrom} grains) pyrochlore matrix. During the early stages of the pyrochlore-to-perovskite conversion process, perovskite growth proceeded nearly isotropically from the substrate to form hemispherically shaped grains. Deviations from isotropic growth were shown to result from a growth dependence based on the crystallographic orientation of a growing perovskite grain relative to the orientations of pyrochlore grains being transformed. The volume change that occurs during the pyrochlore-to-perovskite transformation along with two-dimensional grain growth has been used to develop a mechanism for formation of porosity that commonly is concentrated in grain boundary regions.
Country of PublicationUnited States
LanguageEnglish
Format7 p. ; PL:
AvailabilityOSTI as DE95010453
System Entry Date2001 May 03

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