Manufacture of MgO-based .beta."-alumina sintered bodies

Details Manufacture of MgO-based .beta."-alumina sintered bodies Manufacture of MgO-based .beta."-alumina sintered bodies

1990-12-19

1993-07-20

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501153, 501127, C04B 7544

Patent

active

052293408

ABSTRACT:
A process for manufacturing MgO-based .beta."-alumina sintered bodies from a starting powder comprising an MgO-based .beta."-alumina as a main ingredient, through shaping and firing, in which process shaped bodies before firing contain 0.3.about.5 wt. %, preferably 1.about.3 wt. %, of Na aluminate. The resulting sintered bodies are high in density, ionic conductivity and strength and useful for solid electrolytes, for example, of sodium sulfur cells.

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patent: 5032570 (1991-07-01), Ogata et al.
Petlatsky and Nicholson, The Relative Stability of Spray-Frozen Freeze Stored .beta."-Al.sub.2 O.sub.3 Powders. Mat. Res. Bull., vol. 15, pp. 1517-1524. Oct. 1980.
"Chimie Minerale.-Sur les proprietes d'un nouvel aluminate de sodium NaAl.sub.3 O.sub.8 ", Academie Des Sciences, Comptes Rendus, Jeanine Thery et al., vol. 254, No. 3, 1962, pp. 2782-2684.
Japanese Journal of Applied Physics, "Ionic Conduction of Impurity-Doped .beta.-Alumina Ceramics" by Atsuo Imai and Mituo Harata, vol. 11, No. 2, pp. 180-185, Feb. 1972.
ID State Ionics 13, "Spinel Block Doping and Conductivity of Sodium Beta"-Alumina Ceramics" by Friederich Herbach, pp. 53-61, 1984.
Silicates Industriels 1986/5-6, "Sodium Beta"-Alumina Ceramics: Compositions, Phases, Conductives(*)" by Friedrich Harbach, pp. 81-85.

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