Structure of Liquid Y{sub 3}Al{sub 5}O{sub 12} (YAG)

Journal Article · Mon Apr 17 00:00:00 EDT 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.3622· OSTI ID:20216136

Weber, J K. Richard; Krishnan, Shankar; Ansell, Stuart; Hixson, April D; Nordine, Paul C

The total structure factor S(Q) and the radial distribution function G(r) of liquid Y{sub 3}Al {sub 5}O{sub 12} (YAG) were measured at 1770-2230 K by x-ray scattering from samples under containerless conditions in Ar and O{sub 2} . Nominal coordination numbers are 4 for Al{sup 3+} and 6 for Y{sup 3+} ions. The G(r) has peaks at r{approx_equal}1.8 Angstrom for Al-O, r{approx_equal}2.25 Angstrom for Y-O, and r{approx_equal}3.3-3.6 Angstrom assigned to metal ions in adjacent AlO{sub 4}{sup 5-} and YO{sub 6}{sup 9-} polyhedral ions. Relative to the pure oxides, G(r) for molten YAG has smaller half-widths for the Al-O and Y-O peaks, and an increased sensitivity to temperature and the ambient gas composition. (c) 2000 The American Physical Society.

• OSTI ID: 20216136
• Journal Information: Physical Review Letters, Vol. 84, Issue 16; Other Information: PBD: 17 Apr 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
YTTRIUM OXIDES
ALUMINIUM OXIDES
LIQUIDS
STRUCTURE FACTORS
DISTRIBUTION FUNCTIONS
X-RAY DIFFRACTION
COORDINATION NUMBER
TEMPERATURE DEPENDENCE
ADVANCED PHOTON SOURCE
EXPERIMENTAL DATA