Sodium ion conductor, solid electrolyte strengthened with zircon

Details Sodium ion conductor, solid electrolyte strengthened with zircon Sodium ion conductor, solid electrolyte strengthened with zircon

1981-10-16

1982-11-09

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

501153, 204195S, H01M 1039

Patent

active

043585167

ABSTRACT:
Fracture toughness and strength of .beta.-Al.sub.2 O.sub.3, .beta."-Al.sub.2 O.sub.3, and Na.sub.1+x Zr.sub.2 Si.sub.x P.sub.3-x O.sub.12 solid electrolytes are increased by incorporating metastable grains of tetragonal ZrO.sub.2 in the structure. The ZrO.sub.2 occupies from 5 to 40% of the volume of the ceramic. To enable retention of the metastable tetragonal structure at room temperature, the ZrO.sub.2 has a grain size less than about 2 .mu.m and has dissolved in it a rare earth oxide such as Y.sub.2 O.sub.3, CeO.sub.2, La.sub.2 O.sub.3 and/or Er.sub.2 O.sub.3.

REFERENCES:
patent: 3895963 (1975-07-01), McGowan et al.
patent: 4166159 (1979-08-01), Pober
patent: 4221650 (1980-09-01), Friese et al.
patent: 4298385 (1981-11-01), Claussen et al.
patent: 4322249 (1982-03-01), Claussen et al.
May et al., Recent Progress in The Development of Beta-Alumina For the Sodium-Sulphur Battery, Electrochimica Acta, vol. 24, pp. 755-763, 1979.

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