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Microwave complex index of refraction of ore minerals

A. L. Dzardanov 1, V. V. Tikhonov 2, D. A. Boyarskii 2, O. N. Polyakova 1, G. N. Gol'tsman 1

1Moscow Pedagogical State University

2Space Research Institute (IKIRAN), Moscow

Received September
25, 2012

Abstract: The paper discusses results of studies of complex dielectric permittivity of a number of ore minerals (magnetite, hematite, sphalerite, chalcopyrite, pyrite and ilmenite) and associate barren minerals (labradorite and oligoclase) in copper ore. Techniques to measure the reflection power and transmission coefficient of plain-parallel samples of minerals in the frequency range of 12....145 GHz are described, as well as computation methods and results for dielectric characteristics of the minerals based on the obtained experimental data. Approximation expressions are presented for the real and imaginary parts of complex dielectric permittivity of the minerals depending on radiation frequency in the range of 12145 GHz.

Authors express sincere gratitude to the companies of Open Company TECHNOROS and Open Company RADOS (Krasnoyarsk) for given samples of minerals.

The work was supported by FTP "Scientific and scientific-pedagogical personnel of innovative Russia" for 2009-2013 years, by the Russian Foundation for Basic Research (project N 10-05 00037).

Key words: electrodynamic model, minerals, microwave radiation, reflectivity, transmissivity, complex dielectric permittivity.