Specialists of the Department of Physical Chemistry, Faculty of Chemistry, Moscow State University have developed the composition of a triple additive of barium, chromium and lanthanum, which changes the properties of fine-crystalline corundum. The press service of Moscow State University said that even in a small amount, this additive significantly increases the abrasive ability of the material and the transparency of the ceramics obtained from it. As a result, it becomes possible to create new materials with high abrasive, luminescent and gas diffusion characteristics.
Additives, also known as alloying or doping, are often used by chemists to change the properties of materials. In the described work, corundum, a special crystalline modification of aluminum oxide, was alloyed.
“Corundum and its alloyed derivatives are widely used in high-temperature and luminescent ceramics,” said Valery Kreisberg, Ph.D., Senior Researcher. Faculty of Chemistry, Moscow State University. — Due to their high hardness, corundum materials are used as abrasives for machining, but the effect of dopants is not well understood. In this work, we have attempted to see how doping can improve their quality.”
In the future, the authors plan to find out how other additives will affect the material under study. In particular, they are now experimenting with the addition of manganese in various forms and oxidation states, hoping that this will help to obtain high-temperature transparent luminescent ceramics. Such ceramics can replace the materials currently used in light sources.
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