The diffusivity and solubility of oxygen in liquid tin and solid silver in the temperature range of about 750° to 950°C (1023 to 1223 K) and the diffusivity of oxygen in solid nickel at 1393°C (1666 K) were determined using the electrochemical cell arrangement of cylindrical geometry: Liquid or Solid Metal + O (dissolved) | ZrO2 + (3 to 4%)CaO | Pt, air The diffusivity and solubility of oxygen in liquid tin are given by:D O(Sn) = 9.9 × 10-4 exp(-6300/RT) cm2/s (9.9 × 10-8 exp - 6300/RT m2/s) and N O S (Sn) = 1.3 × 105 exp(-30,000/RT) at. pct The diffusivity and solubility of oxygen in solid silver follow the relations:D O(Ag) = 4.9 × 10-3 exp (-11,600/RT) cm2/s ( 4.9 × 10-7 exp - 11,600/RT m2/s) and N O S (Ag) = 7.2 exp (-11,500/RT) at. pct The experimental value for the preexponential in the expression for D O(Ag) is lower than the value calculated according to Zener's theory of interstitial diffusion by a factor of 11. The diffusivity of oxygen in solid nickel at 1393°C (1666 K) was found to be 1.3 × 10-6 cm2/s (1.3 × 10-10 m2/s).
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