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US 5,334,366 AGranted
Transition alumina and method for its production
AssigneeAluminum Company of America
InventorsAnthony J. Perrotta, Randall B. Minnick
Life of this patent
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Abstract
A new transition alumina is made by heating substantially pure diaspore in a vacuum to an elevated temperature of about 300-1000.degree. C. The new transition alumina has increased surface area compared with alpha-alumina formed by heating diaspore in air.
Claims5
A transition alumina having an x-ray diffraction pattern essentially as shown in Table 1.
A transition alumina having an x-ray diffraction pattern as shown in Table 1.
Dependencies are inferred from the claim text.