| Abstract: | This paper details the results of a comparative study of two materials having the same structure, but drastically different
radiophysical characteristics. Corundum ceramic samples were synthesized from pure substances by firing a charge in air at
1450°C for 1 h. The second material was prepared from natural ilmenite without heat treatment using an epoxy polymer binder.
Measurements of the transmission and reflection factors within the frequency range of 8–26 GHz indicate that corundum ceramic
samples scatter electromagnetic radiation (EMR) exhibiting a pronounced dispersion of the reflection and transmission factors.
On the contrary, ilmenite samples absorb EMR showing no dispersion at all. The differences in the radiophysical characteristics
are due to the presence of magnetic impurities in the crystal lattices of corundum and ilmenite and the specific features
of the spin-phonon interaction in dielectric and ferrite materials. |
