| 摘要 |
PURPOSE:To make it possible to cut off the moisture absorbent property intrinsic to beta-alumina almost perfectly and to prevent the deterioration of ion conductibility following the moisture absorption by forming an organic substance membrane which is not permeated in the moisture but dissolved and burnt out in an oxygen ambiance, on the surface of a beta-alumina tube. CONSTITUTION:A beta-alumina tube 5 furnishing an organic substance membrane on the surface is used, and the organic substance membrane is not permeated in the moisture but dissolved and burnt out in the oxygen ambiance at the temperature lower than about 500 deg.C. By forming the membrane with an organic substance of such a property, the beta-alumina tube 5 generates no ion exchange with H2O<+> even in the atmosphere, and generates no deterioration of the beta-alumina. And since the glass connection is carried out at a high temperature, the membrane is dissolved and burnt out at the glass connection process of the beta-alumina tube 5 and an insulator ring 3, with no trace remaining on the surface of the beta-alumina tube 5. Consequently, the beta-alumina tube 5 is not contacted with the ambiance, while the ion conductibility of the beta-alumina tube 5 is not impaired. |
