Method of preparing .beta."-Al.sub.2 O.sub.3

Details Method of preparing .beta."-Al.sub.2 O.sub.3 Method of preparing .beta."-Al.sub.2 O.sub.3

1976-02-17

1977-05-17

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

429104, C01F 704

Patent

active

040242145

ABSTRACT:
.beta."-Al.sub.2 O.sub.3 is a highly desirable material for serving the double function of solid electrolyte and separator in a rechargeable battery that employs sodium, Na, as the anode and sulfur, S, as the cathode. But conventional means for manufacturing the .beta."-Al.sub.2 O.sub.3 require temperatures between 1400.degree. and 1600.degree. C. By reacting .theta.-Al.sub.2 O.sub.3 with Na.sub.2 O, or a compound that yields Na.sub.2 O on decomposition, the desired .beta."-Al.sub.2 O.sub.3 is obtained at temperatures as low as 950.degree. C.

REFERENCES:
patent: 2454227 (1948-11-01), Smith et al.
patent: 3714343 (1973-01-01), Sato et al.
patent: 3795723 (1974-03-01), Clemlenen et al.
patent: 3859427 (1975-01-01), Francis et al.
Newsome et al., "Alumina Properties", Aluminum Co. of America, Pittsburg, 1960, p. 46.
McGowan, "Dissertation Abstracts, Int. B.," vol. 34(5), 1973, p. 2003.

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