Silicon Self-Diffusion in Quartz

Abstract
30Si diffusion was measured in quartz along c axis in the β-phase field, at T=14001600°C by Rutherford backscattering spectrometry and the 30Si(p,γ)P31 resonant nuclear reaction. The diffusion coefficient D(cm2s1)=10(6.1±2.7)exp[(7.6±1eV)/kT], comparable to D of silicon in vitreous SiO2. We suggest Frenkel pairs as majority defects with diffusion occurring by interstitial mechanism.

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