Direct Observation of Iron Oxide Reduction Using High Voltage Microscopy.
Abstract
The microstructure of reaction products resulting from gaseous reduction of iron oxide has been examined in situ and ex situ by high voltage electron microscopy (HVEM). In order to perform in situ experiments it was necessary to construct a special environmental cell for the AEI EM7 electron microscope. There have been no previous transmission electron microscopy studies of iron ores and whenever possible, micrographs of samples from various localities were obtained although not all the samples were used in reduction experiments. When hematite (Fe2O3) is heated in a reducing atmosphere, magnetite (Fe3O4) nucleates epitaxially at surfaces in contact with the gas. The morphology and rate of growth of the lower oxides were studied.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 15, 1972
- Accession Number
- AD0745981
Entities
People
- Nancy J. Tighe
- Peter R. Swann
Organizations
- Imperial College London