Fixation of nitrogen by alumina and carbon: Tucker and Read, (Amer. Electrochem. Soc. Trans., xxii, 57.)
- Book ID
- 104118478
- Publisher
- Elsevier Science
- Year
- 1913
- Tongue
- English
- Weight
- 68 KB
- Volume
- 176
- Category
- Article
- ISSN
- 0016-0032
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✦ Synopsis
The object of the investigation was to discover whether nitrogen would combine with a heated mixture of alumina and carbon, or with the products arising from the heating of such a mixture, and to study the best conditions for effecting the reaction. The first experiments were made in a wire-wound electric resistance furnace. In order to obtain higher temperatures a granulated carbon furnace was used, through which a tube passed for holding the charge, heated by a single-phase alternating current. At first several porcelain tubes were used, embedded in the granular carbon resistor. These porcelain tubes were unable to stand the sudden changes in temperature. This was overcome by the use of a graphite tube, with a bore ~ inch in diameter. This tube had accurately-fitted stoppers of graphite, through which the nitrogen was passed by means of metallic tubes threaded into the stoppers. The charge was contained in a graphite boat. From the result of the few experiments given it is clear that, under proper conditions, there should be no difficulty in producing aluminum nitride containing 30 per cent., or even more, nitrogen. This should be preferable to calcium cyanamide, which averages 17 to 20 per cent. fixed nitrogen.