チタン線を用いたバリウムゲッターについて
1956 年 25 巻 6 号 p. 240-244
詳細
1956 年 25 巻 6 号 p. 240-244
A new barium getter called “Batitan getter” has been devised using a titanium wire as a reducing agent for barium oxide produced by thermal decomposition of barium carbonate.
Some properties of this getter are compared with those of Batalum getter. At the out-gassing, the total gas evolution of the former is larger than the latter, which is due to the occluded hydrogen in titanium wire. In both cases, the liberated gas is mainly composed of carbon monoxide and carbon dioxide. The evaporation of barium from “Batitan getter” commences at temperatures (_??_1150°C) lower than the flashing temperature of Batalum getter (_??_1400°C) which complies with chemical thermodynamic considerations.
The results of life tests of some vacuum tubes have proved the efficacy of the getter.
