Physical properties and structure of silica-alumina-europium oxide glasses

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb09821.x· OSTI ID:6386908

Tanabe, S; Soga, N; Hirao, K; Hanada, T ^[1]

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1. Dept. of Industrial Chemistry, Faculty of Engineering, College of Liberal Arts and Science, Kyoto Univ., Sakyo-ku, Kyoto 606 (JP)

SiO{sub 2}-Al{sub 2}O{sub 3}-Eu{sub 2}O{sub 3} glasses were prepared for the composition 50SiO{sub 2} {center dot} (50 {minus} {ital x})Al{sub 2}O{sub 3} {center dot} {ital x}Eu{sub 2}O{sub 3}, and their density, sound velocity, and elastic modulus were measured. The chemical shift of the Al{ital K}{alpha} band emission spectra and the isomer shift of {sup 151}Eu by Moessbauer effect were obtained to determine the coordination states of Al{sub 3+} and Eu{sup 3+} ions in these glasses. It was found that the coordination number of Eu{sub 3 +} ions was 12 and that the average coordination number of Al{sub 3+} ions was almost 5 in these glasses. By introducing Eu{sub 2}O{sub 3}, the packing of constituent ions was strongly enhanced and the elastic modulus increased in this system. The compositional dependence of the molar volume and elastic modulus are explained by these states of high coordination number for Eu{sup 3+} and low coordination number for Al{sup 3+} ions compared with those in the corresponding M{sub 2}O{sub 3} crystals.

• OSTI ID: 6386908
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:6; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
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& Refractories-- Structure & Phase Studies
360203 -- Ceramics
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426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHANNELING
CHEMICAL COMPOSITION
CHEMICAL SHIFT
CRYSTAL LATTICES
CRYSTAL STRUCTURE
EMISSION SPECTRA
EUROPIUM 151
EUROPIUM COMPOUNDS
EUROPIUM ISOTOPES
EUROPIUM OXIDES
GLASS
HIGH-TC SUPERCONDUCTORS
INTERMEDIATE MASS NUCLEI
ION CHANNELING
ISOTOPES
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOESSBAUER EFFECT
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
STABLE ISOTOPES
SUPERCONDUCTORS
YOUNG MODULUS