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- W2057914248 abstract "Impurity diffusion of 59Fe, 54Mn, 46Sc, 88Y, 95Zr and 95Nb in both CoO and NiO, and of 22Na in CoO has been measured as a function of temperature (1000–1600° C) in air by the tracer-sectioning technique. It has been shown that the larger ions diffuse more rapidly and have a smaller activation energy than do smaller ions for transition-metal impurity ions having the same valence. The absolute values of the divalent-impurity diffusion coefficients in CoO and NiO are comparable to the self-diffusion coefficients of Co and Ni, respectively. The diffusion coefficients of the bivalent impurity ions are smaller than those of the divalent impurity ions in these oxides. The activation energies for impurity diffusion in CoO and NiO are discussed in terms of the ionic size and the charge state of the diffusing ions." @default.
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- W2057914248 date "1984-01-01" @default.
- W2057914248 modified "2023-10-09" @default.
- W2057914248 title "Cation impurity diffusion in CoO and NiO" @default.
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- W2057914248 doi "https://doi.org/10.1016/0022-3697(84)90140-9" @default.
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