N. Saitô, T. Ôtsuki and K. Yamamoto
We obtained the following results with regard to gases from Al-clad-Fe plates: (1) The volume and the composition of gases from Al-clad-Fe plate are not different from those of the gases from iron evaporated with aluminium or from pure aluminium, but very much different from those from iron. The volume of gas from Al-clad-Fe plate is about 2 cc/100 g and 90% of the gas is pure hydrogen. (2) Heating Al-clad-Fe plates at a higher temperature, some of aluminium evaporates and it shows gettering action. (3) When heated at a lower temperature or neither silicon nor other impurities is contained in aluminium, the blackness of the surface of Al-clad-Fe plate is obvious. (4) When an Al-clade-Fe plate is practically used as the anode of a vacuum tube, the properties of Al-clad-Fe are satisfactory and the character istics of the tube are very good.
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