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Formation of aluminum titanate
In order to produce Al2O3-rich
magnesium aluminate spinel ceramic with
aluminum titanate, pure Al2TiO5 was presynthesized
and subsequently added to the
spinel raw material. At first, suitable
conditions for the Al2TiO5 formation
according to the following equation were
determined.
Al2O3 + TiO2 ↔ Al2TiO5
The percentage of aluminum titanate formed
at two different temperatures and holding
times is shown in Table I. A nearly complete
reaction of the used powders to Al2TiO5 was
achieved at 1650 ¡ãC.

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