The chemical diffusion coefficient was obtained, under an O partial pressure of about 5 x 10-4atm, as a function of temperatures ranging from 700 to 900C (table 86). The results could be described by:
(cm2/s) = 1.62 x 10-4 exp[−5.140(kcal/mol)/RT]
Mass Transport in Cuprous Oxide. P.Ochin, G.Petot-Ervas, C.Petot: Journal of Physics and Chemistry of Solids, 1985, 46[6], 695-700
Table 86
Chemical Diffusion in Cu2O
Temperature (C) | Log[initialPO2(atm)] | Log[finalPO2(atm)] | D (cm2/s) |
890 | -6 | -4 | 1.7 x 10-5 |
890 | -6.18 | -4 | 1.6 x 10-5 |
890 | -6.21 | -4 | 1.5 x 10-5 |
890 | -6.23 | -3.52 | 1.8 x 10-5 |
790 | -6.62 | -4.05 | 1.55 x 10-5 |
790 | -6.66 | -4.06 | 1.5 x 10-5 |
790 | -6.72 | -4.04 | 1.46 x 10-5 |
790 | -6.74 | -3.57 | 1.55 x 10-5 |
790 | -6.75 | -3.57 | 1.53 x 10-5 |
690 | -6.31 | -4.94 | 1.15 x 10-5 |
690 | -6.51 | -4.92 | 1.05 x 10-5 |
690 | -6.80 | -4.92 | 1.02 x 10-5 |
690 | -6.83 | -4.90 | 1.1 x 10-5 |