SELF-DIFFUSION OF OXYGEN IN MAGNETITE . EFFECT OF ANION VACANCY CONCENTRATION AND CATION DISTRIBUTION

被引：61

作者：

CASTLE, JE

SURMAN, PL

机构：

[1] Central Electricity Research Laboratories, Leatherhead, Surrey

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1969年 / 73卷 / 03期

关键词：

D O I：

10.1021/j100723a025

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The variation of the self-diffusion coefficient of oxygen in magnetite with hydrogen/water ratio and temperature can be expressed as D = 1.8 × 10-13(PH2-PH2O)0.27 exp(-17,000/RT) cm2 sec-1 The variation of D with PH2/-PH2O is compared with the theoretical predictions made by Wagner and Schmalzried for ternary oxides. It is concluded that at temperatures above 500°, the distribution of cations in the magnetite lattice becomes randomized due to electron exchange.

引用

页码：632 / &

共 13 条

[1] SELF-DIFFUSION OF OXYGEN IN MAGNETITE . TECHNIQUES FOR SAMPLING AND ISOTOPIC ANALYSIS OF MICRO QUANTITIES OF WATER [J].