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標題: Monte Carlo simulation on the cation diffusion via vacancies in simple spinels
作者: Lu, F.H.
關鍵字: Monte Carlo simulation;correlation factors;diffusion;vacancies;spinels;transport-properties;tracer diffusion;defect structure;solid-solutions;point-defects;magnetite;nonstoichiometry;binary;oxides
Project: Computational Materials Science
期刊/報告no:: Computational Materials Science, Volume 14, Issue 1-4, Page(s) 48-55.
The correlation factors of cations and vacancies for diffusion in simple spinels were calculated by using the Monte Carlo simulation technique. Since the predominant point defects are cationic vacancies at high temperature and especially at high oxygen partial pressures in many spinels, the cations are considered to move primarily via cationic vacancies in this study. Several input parameters including the lattice size, the number of jumps per cation. etc., were optimized to calculate the correlation factors. Then the correlation factors of cations moving via vacancies in simple spinels were calculated in different types of exchange jumps, i.e., diffusion that occurs on tetrahedral or octahedral or both cationic sites. Results were obtained with satisfactory accuracy. The influence of the vacancy concentration on the correlation factors was also analyzed. (C) 1999 Elsevier Science B.V. All rights reserved.
ISSN: 0927-0256
DOI: 10.1016/s0927-0256(98)00071-8
Appears in Collections:材料科學與工程學系

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