INFLUENCE OF OXYGEN-PRESSURE ON OXIDATION REDUCTION PHENOMENA OBSERVED WITH SUBMICROMETER-SIZED MANGANESE-SUBSTITUTED MAGNETITES

被引：5

作者：

GILLOT, B

ELGUENDOUZI, M

机构：

来源：

THERMOCHIMICA ACTA | 1990年 / 162卷 / 02期

关键词：

D O I：

10.1016/0040-6031(90)80348-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Over the temperature range 250-600°C, the oxidation of submicrometre-sized manganese-substituted magnetites depends on oxygen pressure because the presence of manganese ions leads to redox phenomena. Below 400°C, within the single-phase region of the cation-deficient spinel, a quantitative analysis by DTG of oxidizable cations allows the defect concentration associated with partial oxidation of manganese ions in tetrahedral sites to be related to oxygen pressure. Above 550°C, the oxidation of manganese ions not oxidized previously is accompanied by a structural change, but the nature of the inversion products again depends markedly on oxygen pressure. © 1990.

引用

页码：265 / 275

页数：11

共 6 条

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