摘要
The conductivity and stability of Na-beta alumina are markedly affected by H2O. This is a problem of both theoretical and practical interest and has been studied recently by various authors （see e.g. Refs. [1—3] and the works cited therein）. As for the influence of H2O on the conductivity of Na-beta almina （hereafter referred to as beta alumina except in case special reference to Na-ion is necessary）, it was usually measured with mono-or poly-crystalline beta alumina in plate form with few authors using directly beta alumina tubes in contact with moist air. In a previous paper we
