Method for preparing Pb-.beta."-alumina ceramic
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United States of America Patent
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Apr 29, 1986
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N/A
app pub date -
Aug 30, 1984
filing date -
Aug 30, 1984
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Expired
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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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