Gettering Process of Barium—Sorption Properties of Oxygen to Barium—

Abstract

The sorption properties of Ba-O₂ system were studied. Oxygen is mainly adsorbed physically onto the active centres, below −150°C, differing from other kinds of gas. The activation energy for the physical adsorption is 0.3∼0.9 Kcal/g.mol. At temperatures between −150°C and −30°C, it is adsorbed in the activated state and its activation energy is 5.8 Kcal/g.mol. Beyond −30°C oxygen combines with barium to form oxide.