Method for preparing Pb-.beta."-alumina ceramic

Details Method for preparing Pb-.beta."-alumina ceramic Method for preparing Pb-.beta."-alumina ceramic

1984-08-30

1986-04-29

Carter, H. T.

Chemistry of inorganic compounds

Rare earth compound

423593, 423594, 423600, C01F 1700, C01F 702, C01G 1500

Patent

active

045856354

ABSTRACT:
A process is disclosed for preparing impermeable, polycrystalline samples of Pb-.beta."-alumina ceramic from Na-.beta."-alumina ceramic by ion exchange. The process comprises two steps. The first step is a high-temperature vapor phase exchange of Na by K, followed by substitution of Pb for K by immersing the sample in a molten Pb salt bath. The result is a polycrystalline Pb-.beta."-alumina ceramic that is substantially crack-free.

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patent: 4197171 (1980-04-01), Dunn
Dunn et al., "Solid State Ionics", vol. 5, 1981, pp. 203-204.
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Hellstrom et al., "Solid State Ionics", vol. 11, 1983, pp. 125-132.
Crosbie et al., "Journal of the American Ceramic Soc.", vol. 65, Apr. 1982, pp. 187-191.

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