A radiotracer diffusion experiment on silver gives at and at .

PHYSICS · Multi-part · Fermi University Physics · Condensed Matter, Materials & Soft Matter · Crystal structure, bonding and diffraction · Crystal structure, bonding and diffraction

Solid State Physics, Ch Point defects, dislocations and alloys

Problem

A radiotracer diffusion experiment on silver gives D=4.3×10−17 m2 s−1D=4.3\times10^{-17}\,\mathrm{m^2\,s^{-1}} at T=800 KT=800\,\mathrm{K} and D=1.1×10−14 m2 s−1D=1.1\times10^{-14}\,\mathrm{m^2\,s^{-1}} at T=1000 KT=1000\,\mathrm{K}. ((a)) Use the two points to find the activation energy QQ in D=D0e−Q/kBTD=D_0e^{-Q/k_BT}. ((b)) Find the pre-exponential factor D0D_0. ((c)) Predict DD at T=1200 KT=1200\,\mathrm{K}.

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