Solid electrolyte ceramic

Details Solid electrolyte ceramic Solid electrolyte ceramic

1994-10-28

1996-05-21

Bonner, Melissa

Compositions: ceramic

Ceramic compositions

Aluminum compound containing

501120, 501127, 423600, C04B 3510

Patent

active

055189750

ABSTRACT:
A method of making a .beta.-alumina compound which is a polyaluminate of the general formula M.sub.y O.multidot.xAl.sub.2 O.sub.3 in which M is a metal selected from monovalent metals and divalent metals, y=2 when M is a monovalent metal, y=1 when M is a divalent metal and x=4-12 comprises forming a green precursor of the 62 -alumina compound by mixing together particulate aluminium metal and a reagent compound comprising an oxide of the metal M or a precursor thereof. The mixture is heated to 800.degree.-1150.degree. C. in an oxidizing environment to cause oxidation of at least part of the aluminium. Further heating then takes place to 1150.degree.-1350.degree. C. in said environment to cause the oxidized aluminium and oxide of the metal M to react to form the .beta.-alumina compound.

REFERENCES:
patent: 4496664 (1990-08-01), Van Zyl et al.
patent: 4732741 (1988-03-01), Duncan et al.
patent: 5162273 (1992-11-01), Newkirk et al.
patent: 5326519 (1994-07-01), Claussen
patent: 5358914 (1994-10-01), Newkirk et al.

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