Polymerized complex route to synthesis of pure Y2Ti2O7 at 750°C using yttrium-titanium mixed-metal citric acid complex

Masato Kakihana; Maria M. Milanova; Momoko Arima; Toru Okubo; Masatomo Yashima; Masahiro Yoshimura

doi:10.1111/j.1151-2916.1996.tb08781.x

Polymerized complex route to synthesis of pure Y₂Ti₂O₇ at 750°C using yttrium-titanium mixed-metal citric acid complex

Masato Kakihana, Maria M. Milanova, Momoko Arima, Toru Okubo, Masatomo Yashima, Masahiro Yoshimura

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1673-1676
Number of pages	4
Journal	Journal of the American Ceramic Society
Volume	79
Issue number	6
DOIs	https://doi.org/10.1111/j.1151-2916.1996.tb08781.x
Publication status	Published - 1996 Jun

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1996.tb08781.x

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title = "Polymerized complex route to synthesis of pure Y2Ti2O7 at 750°C using yttrium-titanium mixed-metal citric acid complex",

abstract = "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.",

author = "Masato Kakihana and Milanova, {Maria M.} and Momoko Arima and Toru Okubo and Masatomo Yashima and Masahiro Yoshimura",

year = "1996",

month = jun,

doi = "10.1111/j.1151-2916.1996.tb08781.x",

language = "English",

volume = "79",

pages = "1673--1676",

journal = "Journal of the American Ceramic Society",

issn = "0002-7820",

publisher = "Wiley-Blackwell",

number = "6",

}

Polymerized complex route to synthesis of pure Y₂Ti₂O₇ at 750°C using yttrium-titanium mixed-metal citric acid complex. / Kakihana, Masato; Milanova, Maria M.; Arima, Momoko; Okubo, Toru; Yashima, Masatomo; Yoshimura, Masahiro.

In: Journal of the American Ceramic Society, Vol. 79, No. 6, 06.1996, p. 1673-1676.

Research output: Contribution to journal › Article › peer-review

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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Polymerized complex route to synthesis of pure Y₂Ti₂O₇ at 750°C using yttrium-titanium mixed-metal citric acid complex

Abstract

All Science Journal Classification (ASJC) codes

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