Analysis of Liquid-State Interdiffusion in the System CaO-Al2O3-SiO2 Using Multiatomic Ion Models期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Analysis of Liquid-State Interdiffusion in the System CaO-Al₂O₃-SiO₂ Using Multiatomic Ion Models

Authors:	Y OISHI M NANBA JOSEPH A PASK

Affiliation:	Department of Nuclear Engineering, Faculty of Engineering, Kyushu University, Hakozaki, Fukuoka 812, Japan;Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, College of Engineering, University of California, Berkeley, California 94720

Abstract:	Concentration profiles after liquid-state interdiffusion were determined using an electron probe microanalyzer for diffusion couples of ternary oxide systems with an average composition -40CaO₂OAl₂O₃-40SiO₂ (wt%) at r=1370° to 1550°C. Multicomponent diffusion equations were derived for three multiatomic ion models in terms of tracer diffusion coefficients of the constituent elements. The sizes of the diffusing units for silicate and aluminate ions were estimated by determining the structure parameters in the diffusion equations so as to provide the best fit of the theoretical calculations to the experimentally determined concentration profiles. The results were compared with the theoretical calculations for the monoatomic ion model and the oxide molecule model as diffusing species.

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