Preparation of SrBi2Ta2O9 from metal alkoxides

Miah Muhammed Yusuf, Hiroaki Imai, Hiroshi Hirashima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

SrBi2Ta2O9 (SBT) has potential application in FERAM. Some problems in the sol-gel processing of SBT, such as the solubility of metal alkoxides, chemical modification with a chelating reagent and crystallization behavior of the gels, are investigated. The starting solutions were prepared with Sr(OC4H9)2, Bi(OC3H7)3, and Ta(OC2H5)5. Ethoxyethanol and acetylacetone (ACAC) were used as solvent and chelating reagent, respectively. Ta- and Bi-alkoxide are chemically modified with ACAC, but Sr-alkoxide was not. The SBT solution was stabilized with ACAC for ca. 3 months. After hydrolysis of the SBT solution with the addition of ACAC, a monolithic and transparent gel was obtained at room temperature in 100 days. The X-ray diffraction peaks of SBT and very weak peaks of SrTa2O6 (ST) and SrBi2O4 (SB) were found after calcination at 700°C for both of the gels obtained with and without addition of ACAC. In contrast, the stronger peaks of ST and SB were observed for the powder mixture of SrCO3, Bi2O3, and Ta2O5 after calcination at 800°C. These results show the better homogeneity of the gels.

Original languageEnglish
Pages (from-to)599-601
Number of pages3
JournalJournal of Sol-Gel Science and Technology
Volume19
Issue number1-3
DOIs
Publication statusPublished - 2000 Dec

Fingerprint

acetylacetone
alkoxides
Gels
Metals
gels
preparation
Chelation
metals
Calcination
roasting
reagents
Chemical modification
Sol-gels
Hydrolysis
Crystallization
Solubility
Powders
homogeneity
hydrolysis
X ray diffraction

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Preparation of SrBi2Ta2O9 from metal alkoxides. / Yusuf, Miah Muhammed; Imai, Hiroaki; Hirashima, Hiroshi.

In: Journal of Sol-Gel Science and Technology, Vol. 19, No. 1-3, 12.2000, p. 599-601.

Research output: Contribution to journalArticle

Yusuf, Miah Muhammed ; Imai, Hiroaki ; Hirashima, Hiroshi. / Preparation of SrBi2Ta2O9 from metal alkoxides. In: Journal of Sol-Gel Science and Technology. 2000 ; Vol. 19, No. 1-3. pp. 599-601.
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