Grain-boundary grooving methods were used to study the diffusion of Ag at 973 to 1073K. The results could be described by:

D (m2/s) = 2.49 x 10-1 exp[-166(kJ/mol)/RT]

at an O partial pressure of 10-11Pa, and by:

D (m2/s) = 1.71 x 10-3 exp[-106(kJ/mol)/RT]

at an O partial pressure of 105Pa.

K.Yoshihara, K.Nii: Transactions of the Japan Institute of Metals, 1979, 20[9], 533-42