ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Equimolar Al2O3-TiO2 composite powders were prepared via controlled hydrolysis of organometallic precursors, sometimes in the presence of submicrometre commercialγ-Al2O3 or anatase-TiO2 particles. Variations in the chemical procedures were used aimed at different submicrostructures within the resulting powders. Heating such powders in air shows that structural behaviour is influenced by the micromorphology of the composite particle. Transformation temperatures of the titania phases seem to depend upon some size parameter which would represent their morphology within the powders. Studies performed on a series of non-equimolar Al2O3-TiO2 composite powders showed that the temperature of α-Al2O3 formation may be decreased by ∼210° C possibly due to a seeding effect of rutile. Pseudobrookite Al2TiO5 was never detected at ≲1300° C in air.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01106567
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