O-18 DIFFUSION THROUGH AMORPHOUS SIO2 AND CRISTOBALITE

被引：63
|
作者：
RODRIGUEZVIEJO, J
SIBIEUDE, F
CLAVAGUERAMORA, MT
MONTY, C
机构：
[1] UNIV AUTONOMA BARCELONA,DEPT FIS,E-08193 BARCELONA,SPAIN
[2] LAB PHYS MAT,CNRS,F-92195 MEUDON,FRANCE
来源：
APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 14期
关键词：
D O I：
10.1063/1.110644
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Secondary ion mass spectrometry was used to profile the diffusion of oxygen in polycrystalline beta-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 beta-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-degrees-C, is about five times greater for vitreous silica than for beta-cristobalite.
引用
收藏
页码：1906 / 1908
页数：3
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