Refractory oxides

Details Refractory oxides Refractory oxides

1995-12-14

1998-09-22

Marcantoni, Paul

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423600, 501 12, 501123, 501132, C04B 3502

Patent

active

058110712

ABSTRACT:
A precursor, in gel form, of an oxide having the formula (I), BaO.n(Al.sub.2x Cr.sub.2y O.sub.3), where 1.ltoreq.n.ltoreq.6.6, (x+y)=1, and 0.ltoreq.y.ltoreq.0.5, said oxide being derivable from the precursor gel by the application of heat, is prepared by mixing a solution of a barium salt with a solution of an aluminium salt or a solution of an aluminium salt and a solution of a chromium salt, and polymerising the mixture to produce said precursor gel. A mixture suitable for firing to an oxide of the formula (II), BaO.m(Al.sub.2x Cr.sub.2y O.sub.3), where 4.6.ltoreq.m.ltoreq.6.6; (x+y)=1; and 0.ltoreq.y.ltoreq.0.5, comprises at least one of:

REFERENCES:
patent: 4897232 (1990-01-01), Emblem et al.
patent: 5002906 (1991-03-01), Soroka
patent: 5061682 (1991-10-01), Aksay et al.

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