Combustion of magnesium particles I

✍ Scribed by H.M. Cassel; I. Liebman

• Book ID: 103038705
• Publisher: Elsevier Science
• Year: 1962
• Tongue: English
• Weight: 457 KB
• Volume: 6
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(62)90084-6

✦ Synopsis

Evaluation o[ measurements o/ the liletimes o[ magnesium particles (50 to 120 micron diameter), burning in oxygen, air, 20~+8 A, and 202+8 He, strongly supports the conclusion that the overall reaction is governed by diffusion, predominantly o] oxygen atoms in thc first three gases but of oxygen molecules at the lower temperature in the helium mixture. The data are consistent with the cenosphere model, a porous oxide shell containing the ~'vaporating metal drop, the reaction zone extending to an approximately constant distance /rom the shell. Thermodynamic and thermochemical information on the magnesium-oxygen ,v.,tem substantiates the assumed flame structure i[ the reaction zone thickness is determined by the time requirement Jor nucleation and precipitation o[ magnesium oxide.