Title:
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180 diffusion through amorphous SiOs and cristobalite
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Author:
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Rodríguez-Viejo, Javier; Sibieude, F.; Clavaguera-Mora, M. T.; Monty, C.; American Physical Society
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Abstract:
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Secondary ion mass spectrometry was used to profile the diffusion of oxygen in polycrystalline β-cristobalite and vitreous SiO2. The tracer concentration profiles of cristobalite are consistent with a model based on two mechanisms: bulk and short-circuit diffusion. The profiles of partially crystallized samples containing vitreous SiO2 and β-cristobalite were fitted using the sum of two complementary error functions and taking account of some interstitial-network exchange. The bulk oxygen diffusivity, in the temperature range 1240-1500 °C, is about five times greater for vitreous silica than for β-cristobalite. |
Subject(s):
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-Diffusion -Mass diffusion -Polycrystals -Secondary ion mass spectroscopy -Silica |
Rights:
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open access
Tots els drets reservats.
https://rightsstatements.org/vocab/InC/1.0/ |
Document type:
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Article |
Published by:
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Share:
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Uri:
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https://ddd.uab.cat/record/116306
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