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JACerS
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Compositional Modification of Hot‐Pressed Silicon Nitride by High‐Temperature Electrolysis

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Abstract

Impurities and additives used in the liquid‐phase densifica‐tiondensification of silicon nitride ceramics are preferentially partitioned to the residual intergranular glass phase remaining in these materials. On the basis of a simple phenomenological ionic migration model, it is proposed and demonstrated that a high‐temperature electrolysis treatment may be used to modify the concentration of both the additive and impurities. The compositional modification has a number of consequences and, as an illustration, the improvement in high‐frequency dielectric loss produced as a result of the electrolysis treatment is presented. Copyright © 1984, Wiley Blackwell. All rights reserved

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JACerS

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