Method for producing coarsely crystalline alumina

Details Method for producing coarsely crystalline alumina Method for producing coarsely crystalline alumina

1977-05-24

1978-12-19

Carter, Herbert T.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

423625, C04B 3102, C01F 702

Patent

active

041304020

ABSTRACT:
Coarsely crystalline aluminum oxide is provided which contains the following trace elements: V.sub.2 O.sub.5 > 0.005 percent by weight, P.sub.2 O.sub.5 > 0.005 percent by weight, Na.sub.2 O > 0.8 percent by weight.
A method is provided for producing such an aluminum oxide by calcining aluminum hydroxide in the presence of at least one flouride and of vanadium salt.

REFERENCES:
patent: 2360841 (1944-10-01), Baumann et al.
patent: 3406010 (1968-10-01), Holderreed et al.
patent: 3457032 (1969-07-01), La Breteque
patent: 3832442 (1974-08-01), Emerson
patent: 4019914 (1977-04-01), Esper et al.

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