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Barium: Barium Oxide Heated with Aluminium at 1200 °C in Vacuum (Guntz, Thorpe 1912)
Aluminium pulls the oxygen from barium oxide at 1200 °C. In a vacuum the freed barium boils off and condenses as metal in the cool end of the tube.
Result: silver-white barium, up to 98.8 % pure. It burns easily in air; Thorpe keeps barium in dry carbon dioxide.
Source: Thorpe, Dictionary of Applied Chemistry vol. 1 (1912), p. 418, after Guntz. Not given: the tube, amounts and time. Picture drawn by Youblob.
高级
1 day
说明
1
1
Mix oxide with one-tenth aluminium
Mix oxide with one-tenth aluminium
Weigh barium oxide and mix it with one-tenth of its weight of aluminium. Ours: aluminium powder.
此步骤所需材料：
氧化钡1 as required所需工具：
铝粉
精密数字天平
石制研钵与研杵2
2
Heat to 1200 °C in vacuum
Heat to 1200 °C in vacuum
Heat the mixture to 1200 °C in an evacuated tube. Ours: a porcelain tube in a tube furnace on a vacuum pump. Barium vapour attacks glass; in his other method Guntz lines the tube with nickel foil.
所需工具：
瓷管
管式炉
高温计
真空泵3
3
Collect the metal from the cool end
Collect the metal from the cool end
The barium condenses in the cooler part of the tube. Take it out and keep it in dry carbon dioxide; it oxidises fast in air.
所需工具：
瓷管此蓝图制作
CC0 公共领域
此蓝图以 CC0 协议发布。你可以自由复制、修改、分发和使用此作品，无需征得许可。
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