Influence of solution composition on the formation of SiO2/LaF3 composites in the sol-gel process

Shinobu Fujihara, T. Kato, T. Kimura

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Influence of starting solution composition on the formation of SiO2/LaF3 composites was examined in the sol-gel process of tetramethylorthosilicate, methanol, water and N,N-dimethylformamide. Trifluoroacetic acid (TFA) and lanthanum acetate were used as chemical sources for LaF3. Microcrystals of LaF3 with a size of 10 nm were formed in silica matrix by heating dried gels above 300°C. Colorization, crack formation and fragmentation during drying and heating gels were greatly dependent on the amount of TFA. It was possible to suppress fragmentation of the heated gels by using lanthanum trifluoroacetate gels as precursor in preparing the starting solutions.

Original languageEnglish
Pages (from-to)2763-2767
Number of pages5
JournalJournal of Materials Science
Volume35
Issue number11
DOIs
Publication statusPublished - 2000

Fingerprint

Trifluoroacetic Acid
Sol-gel process
Gels
Trifluoroacetic acid
Lanthanum
Composite materials
Chemical analysis
Heating
Dimethylformamide
Microcrystals
Crack initiation
Silicon Dioxide
Methanol
Drying
Acetates
Silica
lanthanum trifluoride
Water

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Influence of solution composition on the formation of SiO2/LaF3 composites in the sol-gel process. / Fujihara, Shinobu; Kato, T.; Kimura, T.

In: Journal of Materials Science, Vol. 35, No. 11, 2000, p. 2763-2767.

Research output: Contribution to journalArticle

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