Microstructure of electrocorundum

Conclusions

Investigation of the microsturcture of electrocorundum has shown that two types of micro structure are typical of standard electrocorundum:

The first type is a hypidiomorphic structure and the accompanying phases fill the gaps between the corundum crystals; accompanying phases fill the gaps between the corundum crystals;

The second type of corundum is represented by large “fields”, the diameters of which-attain several millimeters; the accompanying phases are present in the form of impurities in the body of the corundum “fields”.

White electrocorundum, generally speaking, has a microstructure of the second type, but is marked by dendritic shapes and a considerable volume of cavities.