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An x-ray photoelectron spectroscopic study of the chemical states of fluorine atoms in calcium silicate glasses

Published online by Cambridge University Press:  31 January 2011

Satoshi Hayakawa ,
Akira Nakao ,
Chikara Ohtsutki ,
Akiyoshi Osaka ,
Shuji Matsumoto  and
Yoshinari Miura
Satoshi Hayakawa
Affiliation:
Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Tsushima, Okayama-shi 700, Japan
Akira Nakao
Affiliation:
Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Tsushima, Okayama-shi 700, Japan
Chikara Ohtsutki
Affiliation:
Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Tsushima, Okayama-shi 700, Japan
Akiyoshi Osaka
Affiliation:
Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Tsushima, Okayama-shi 700, Japan
Shuji Matsumoto
Affiliation:
Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University, Tsushima, Okayama-shi 700, Japan
Yoshinari Miura
Affiliation:
Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University, Tsushima, Okayama-shi 700, Japan
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Abstract

X-ray photoelectron spectroscopy has been used to examine the chemical states of fluorine in the glasses of composition xCaF2(50 – x)CaO · 50SiO2 (x = 5, 10, 15, 20, and 25 mol %) and xCaF2(50 – x/2)CaO(50 – x/2)SiO2 (x = 5, 10, 15, and 20 mol %). The analysis of the F1s spectra indicated that Ca2+ and F- ions introduced as CaF2 are favorably located among the Si–O skeleton forming Ca–F clusters. The fraction of the bridging and nonbridging oxygen atoms was derived from the O1s spectra, and the network of the fluorine-containing glasses was concluded to depend only on the ratio CaO/SiO2.

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Type
Articles
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Journal of Materials Research , Volume 13 , Issue 3 , March 1998 , pp. 739 - 743
Copyright
Copyright © Materials Research Society 1998

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References

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