Sol-Gel Synthesis of Silica-Based Oxyfluoride Glass-Ceramic Thin Films: Incorporation of Eu3+ Activators into Crystallites

Shinobu Fujihara, Takayoshi Kato, Toshio Kimura

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Transparent oxyfluoride glass-ceramic thin films were prepared using a sol-gel method starting from rare-earth trifluoroacetate/silicon alkoxide solutions. SiO2-LaF3 and SiO2-LaOF glass-ceramics were formed by heating at temperatures of 300°-500°C and 600°-900°C, respectively. Eu3+ activators were successfully incorporated into oxyfluoride crystals, as evidenced by their luminescent properties, such as capability of a charge-transfer (O2--Eu3+) excitation, suppression of a multiphonon relaxation, and occurrence of a cross-relaxation at low Eu3+ concentrations. As a result, the films exhibited strong red emission by ultraviolet excitation. The incorporation supposedly originated from decomposition of the (La,Eu)-trifluoroacetates in the silica-gel matrix.

Original languageEnglish
Pages (from-to)2716-2718
Number of pages3
JournalJournal of the American Ceramic Society
Volume84
Issue number11
Publication statusPublished - 2001 Nov

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Trifluoroacetic Acid
Glass ceramics
Crystallites
Silicon Dioxide
Sol-gels
Silica
Thin films
Silica Gel
Silica gel
Silicon
Sol-gel process
Rare earths
Charge transfer
Decomposition
Heating
Crystals
Temperature
fluorine monoxide
lanthanum trifluoride

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Sol-Gel Synthesis of Silica-Based Oxyfluoride Glass-Ceramic Thin Films : Incorporation of Eu3+ Activators into Crystallites. / Fujihara, Shinobu; Kato, Takayoshi; Kimura, Toshio.

In: Journal of the American Ceramic Society, Vol. 84, No. 11, 11.2001, p. 2716-2718.

Research output: Contribution to journalArticle

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