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Aluminum Oxide‐Titanium Oxide Solid Solution
Author(s) -
DEAN McKEE WILLIAM,
ALESHIN EUGENE
Publication year - 1963
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.1151-2916.1963.tb13771.x
Subject(s) - corundum , solid solution , solubility , materials science , oxide , titanium , grain boundary , inorganic chemistry , aluminium , chemical engineering , metallurgy , mineralogy , microstructure , chemistry , engineering
An oxide of titanium, apparently Ti 2 O 3 , showed solid solubility in Al 2 O 3 of 1.0, 1.8, and 2.5 mole % at 1400°, 1600°, and 1700°C, respectively, when heated in hydrogen with a dew point of about ‐50°C. At the same temperatures in air, however, no indication of solid solubility (of TiO 2 , presumably) was found by X‐ray diffraction. It is concluded, therefore, that titania effects densification and grain growth of alumina by grain‐boundary action rather than by a defect mechanism in the corundum lattice resulting from the substitutional solution of Ti 4+ ions.