کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1569956 | 1514272 | 2006 | 7 صفحه PDF | دانلود رایگان |

To investigate the geometrical effects on nuclear graphite oxidation in the regime where the chemical effect is the rate-controlling process, we introduce the concept of internal surface density into the Arrhenius-type reaction model and suggest how to determine it experimentally. Using the 16 different samples of IG-110 graphite, which have different ratios of external surface to volume, we obtained the value of internal surface density as 17 260 m−1. We found out that the external surface reaction is very small compared to the total reaction for the IG-110 graphite: the ratio of the external surface reaction to the total reaction was within 5%. Finally, we propose the following reaction equation for this material:r‴(kg/m3s)≈2552000·exp-218000R·T·PO20.75.
Journal: Journal of Nuclear Materials - Volume 348, Issues 1–2, 1 January 2006, Pages 174–180