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Phase decomposition in Al 2 O 3 –SiO 2 glasses
Author(s) -
Jantzen C.,
Schwahn D.,
Schelten J.,
Herman H.
Publication year - 1978
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889878014028
Subject(s) - electron microprobe , materials science , small angle x ray scattering , amorphous solid , analytical chemistry (journal) , decomposition , phase (matter) , scattering , crystallography , mineralogy , metallurgy , chemistry , optics , physics , organic chemistry , chromatography
The kinetics of unmixing of SiO 2 ‐rich compositions of ultra‐rapidly quenched amorphous Al 2 O 3 –SiO 2 was investigated with both neutron (SANS) and X‐ray (SAXS) small‐angle scattering. Al 2 O 3 ‐SiO 2 glasses of 20, 25, 30, and 35% Al 2 O 3 were prepared by extrusion at 1850° by water‐cooled stainless steel rollers. The samples were found by X‐rays to be amorphous, and electron microprobe measurements showed the compositions to be ~21, 24, 28 and 33 ± 1–2% Al 2 O 3 , respectively. The samples were annealed in a vertical tube furnace in air. SANS experiments were carried out at the Jülich FRJ‐2 reactor and SAXS at Oak Ridge National Laboratory.