Abstract
The carbon dioxide in the iron and steel industries accounts for about 5% of the total world CO 2 emissions because of the use of coal as reductant, heat source, carburization and so on. There are many research projects for reduction of carbon dioxide. But most of them are still depend on the carbon as reductant. Recently we found that several kinds of ceramics could reduce iron-oxide with in-situ electron microscopy. They do not include carbon and no carbon dioxide produce during the reaction with iron-oxides. Figure showed the change of the specimen on the tip. This change was very rapid and completed within 1 frame of the VTR. Black dots appeared around the specimen after the change was identified as iron by EDS. These black precipitates appeared only on the base of the tip. The Protochip company which made heating holder told us that the component of the tip was silicon nitride (Si 3 N 4 ).
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