TY - JOUR
T1 - Polymerized Complex Synthesis of Perovskite Lead Titanate at Reduced Temperatures
T2 - Possible Formation of Heterometallic (Pb,Ti)-Citric Acid Complex
AU - Kakihana, Masato
AU - Okubo, Toru
AU - Arima, Momoko
AU - Uchiyama, Osamu
AU - Yashima, Masatomo
AU - Yoshimura, Masahiro
AU - Nakamura, Yoshiyuki
PY - 1997/1/1
Y1 - 1997/1/1
N2 - Perovskite PbTiO3 powders were prepared by a polymerized complex technique at relatively low temperatures, viz. 400-600°C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and Pb and Ti ions with a molar ratio of Pb/Ti/CA/EG = 1/1/10/40 at 130°C produced a yellowish transparent polymeric gel without any precipitation, which after pyrolysis at 300°C was converted to a powder precursor for PbTiO3. We suggest, based on the results of Raman and 13C NMR spectroscopies, that a heterometallic (Pb,Ti)-CA3 chelate complex formed in a starting Pb/Ti/CA/EG solution and it was thermally stable upon polymerization at 130°C. Chemical analyses showed no PbO loss during calcination of powder precursors at 400-700°C, which led to the conclusion that a solid-state reaction between isolated PbO and TiO2 particles was not responsible for PbTiO3 formation, but PbTiO3 formed directly by thermal decomposition of the powder precursor above 400°C.
AB - Perovskite PbTiO3 powders were prepared by a polymerized complex technique at relatively low temperatures, viz. 400-600°C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and Pb and Ti ions with a molar ratio of Pb/Ti/CA/EG = 1/1/10/40 at 130°C produced a yellowish transparent polymeric gel without any precipitation, which after pyrolysis at 300°C was converted to a powder precursor for PbTiO3. We suggest, based on the results of Raman and 13C NMR spectroscopies, that a heterometallic (Pb,Ti)-CA3 chelate complex formed in a starting Pb/Ti/CA/EG solution and it was thermally stable upon polymerization at 130°C. Chemical analyses showed no PbO loss during calcination of powder precursors at 400-700°C, which led to the conclusion that a solid-state reaction between isolated PbO and TiO2 particles was not responsible for PbTiO3 formation, but PbTiO3 formed directly by thermal decomposition of the powder precursor above 400°C.
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U2 - 10.1021/cm9602353
DO - 10.1021/cm9602353
M3 - Article
AN - SCOPUS:0000873051
VL - 9
SP - 451
EP - 456
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 2
ER -