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- W2015820914 abstract "Secondary ion mass spectrumètry has been applied for measuring the tracer diffusivity of oxygen in the c direction of single-crystal rutile for a temperature range of 1150 to 1450 K at 6000 Pa pressure of oxygen gas. Specimens diffusion-annealed in oxygen gas containing 18O were subsequently continuously sputtered and analyzed for 16O and 18O. The tracer diffusivity was determined from the depth profile of 18O, taking into account a surface exchange reaction of oxygen. The tracer diffusivity in Cr2O3-doped rutile was 3 to 8 times larger than that in pure rutile. For pure rutile, the diffusivity is expressed by D(m2/s)=3.4×10−7, exp [-251(kJ/mol)/RT], and for 0.08 mol% Cr2O3-doped rutile, by D(m2/s)= 2.0×10−8 exp[-204(KJ/mol)/RT]. The Cr2O3 doping had a catalytic effect on the rate constant of the surface exchange reaction on the c surface. The rate constant is represented, for pure rutile, by K(m/s)= 2.4×10−1 exp[-246(KJ/mol)/RT], and for 0.08 mol% Cr2O3-doped rutile, k(m/s)= 3.5×10−5 exp[-131(KJ/mol)/RT]." @default.
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- W2015820914 date "1979-09-01" @default.
- W2015820914 modified "2023-09-27" @default.
- W2015820914 title "Depth Profile Measurement by Secondary Ion Mass Spectrometry for Determining the Tracer Diffusivity of Oxygen in Rutile" @default.
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- W2015820914 doi "https://doi.org/10.1111/j.1151-2916.1979.tb19101.x" @default.
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