Preparation of highly pure iron by vapour deposition

✍ Scribed by Dr.-Ing. habib. G. Weise; G. Owsian

• Publisher: John Wiley and Sons
• Year: 1976
• Tongue: English
• Weight: 549 KB
• Volume: 11
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.19760110705

✦ Synopsis

Abstract

Hydrogen reduction of ferrous chloride performed at a hot iron wire results in highly pure iron in the form of polycrystalline rods. The effects of the mixture ratio hydrogen/ferrous chloride and the deposition temperature on the yield and the supersaturation on the type of iron deposition are discussed. The highly pure iron rods produced by vapour deposition have a theoretical density of 7.875 g/cm^3^. The high purity is demonstrated by a coercivity H~c~ of 0.01 oersted and a residual resistivity ratio R~293°K~/R~4.2°K~ of 3 × 10^3^. The purity of this iron is higher than that of repeatedly zone‐melted electrolytic iron and comparable to that of zone‐melted iron prepared from chemically purified iron powder.