TY - JOUR
T1 - Polymerized complex route to synthesis of pure Y2Ti2O7 at 750°C using yttrium-titanium mixed-metal citric acid complex
AU - Kakihana, Masato
AU - Milanova, Maria M.
AU - Arima, Momoko
AU - Okubo, Toru
AU - Yashima, Masatomo
AU - Yoshimura, Masahiro
PY - 1996/6
Y1 - 1996/6
N2 - A polymerized complex technique was used to prepare high-purity pyrochlore Y2Ti2O7 powders at 750°C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and yttrium and titanium ions, with a molar ratio of CA:EG:Y:Ti = 5:20:1:1, at 130°C produced a yellowish transparent polymeric gel without any precipitation; this material was used subsequently as a precursor for Y2Ti2O7. Based on the results of 13C-NMR spectroscopy, it was suggested that a mixed-metal (Y,Ti)-CA3 chelate complex formed in a starting CA/EG solution. The formation of pure pyrochlore Y2Ti2O7 occurred when the precursor was heat-treated in a furnace set at 750°C in static air for 4 h.
AB - A polymerized complex technique was used to prepare high-purity pyrochlore Y2Ti2O7 powders at 750°C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and yttrium and titanium ions, with a molar ratio of CA:EG:Y:Ti = 5:20:1:1, at 130°C produced a yellowish transparent polymeric gel without any precipitation; this material was used subsequently as a precursor for Y2Ti2O7. Based on the results of 13C-NMR spectroscopy, it was suggested that a mixed-metal (Y,Ti)-CA3 chelate complex formed in a starting CA/EG solution. The formation of pure pyrochlore Y2Ti2O7 occurred when the precursor was heat-treated in a furnace set at 750°C in static air for 4 h.
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U2 - 10.1111/j.1151-2916.1996.tb08781.x
DO - 10.1111/j.1151-2916.1996.tb08781.x
M3 - Article
AN - SCOPUS:0030169620
VL - 79
SP - 1673
EP - 1676
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 6
ER -