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Subsolidus Phase Relationships in the Ga 2 O 3 –Al 2 O 3 –TiO 2 System
Author(s) -
Jaromin Andrea L.,
Edwards Doreen D.
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00484.x
Subject(s) - rutile , corundum , gallium , crystallography , phase (matter) , solid solution , materials science , x ray crystallography , diffraction , mineralogy , chemistry , analytical chemistry (journal) , metallurgy , physics , optics , organic chemistry , chromatography
Subsolidus phase relationships in the Ga 2 O 3 –Al 2 O 3 –TiO 2 system at 1400°C were studied using X‐ray diffraction. Phases present in the pseudoternary system include TiO 2 (rutile), Ga 2−2 x Al 2 x O 3 ( x ≤0.78 β‐gallia structure), Al 2−2 y Ga 2 y O 3 ( y ≤0.12 corundum structure), Ga 2−2 x Al 2 x TiO 5 (0≤ x ≤1 pseudobrookite structure), and several β‐gallia rutile intergrowths that can be expressed as Ga 4−4 x Al 4 x Ti n −4 O 2 n −2 ( x ≤0.3, 15≤ n ≤33). This study showed no evidence to confirm that aluminum substitution of gallium stabilizes the n =7 β‐gallia–rutile intergrowth as has been mentioned in previous work.