TY - JOUR
T1 - Quantitative chemical analysis of fluorite-to-perovskite transformations in (Pb,La) (Zr,Ti)O3 PLZT thin films
AU - Parish, Chad M.
AU - Brennecka, Geoff L.
AU - Tuttle, Bruce A.
AU - Brewer, Luke N.
PY - 2008/11
Y1 - 2008/11
N2 - Lead loss during processing of solution-derived Pb(Zr,Ti)O3 (PZT)-based thin-films can result in the formation of a Pb-deficient, nonferroelectric fluorite phase that is detrimental to dielectric properties. It has recently been shown that this nonferroelectric fluorite phase can be converted to the desired perovskite phase by postcrystallization treatment. Here, quantitative standard-based energy-dispersive x-ray spectrometry (EDS) in a scanning transmission electron microscope (STEM) is used to study cation distribution before and after this fluorite-to-perovskite transformation. Single-phase perovskite PbZr0.53 Ti0.47O3 (PZT 53 /47) and Pb0.88 La0.12 Zr0.68 Ti0.29O3 (PLZT 12/70/30) specimens that underwent this treatment were found to be chemically indistinguishable from the perovskite present in the multiphase specimens prior to the fluorite-to-perovskite transformation. Significant Zr-Ti segregation is found in PLZT 12/70/30, but not in PZT 53/47. Slight La-segregation was seen in rapidly crystallized PLZT, but not in more slowly crystallized PLZT.
AB - Lead loss during processing of solution-derived Pb(Zr,Ti)O3 (PZT)-based thin-films can result in the formation of a Pb-deficient, nonferroelectric fluorite phase that is detrimental to dielectric properties. It has recently been shown that this nonferroelectric fluorite phase can be converted to the desired perovskite phase by postcrystallization treatment. Here, quantitative standard-based energy-dispersive x-ray spectrometry (EDS) in a scanning transmission electron microscope (STEM) is used to study cation distribution before and after this fluorite-to-perovskite transformation. Single-phase perovskite PbZr0.53 Ti0.47O3 (PZT 53 /47) and Pb0.88 La0.12 Zr0.68 Ti0.29O3 (PLZT 12/70/30) specimens that underwent this treatment were found to be chemically indistinguishable from the perovskite present in the multiphase specimens prior to the fluorite-to-perovskite transformation. Significant Zr-Ti segregation is found in PLZT 12/70/30, but not in PZT 53/47. Slight La-segregation was seen in rapidly crystallized PLZT, but not in more slowly crystallized PLZT.
UR - http://www.scopus.com/inward/record.url?scp=56549126787&partnerID=8YFLogxK
U2 - 10.1557/JMR.2008.0353
DO - 10.1557/JMR.2008.0353
M3 - Article
AN - SCOPUS:56549126787
SN - 0884-2914
VL - 23
SP - 2944
EP - 2953
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 11
ER -