spinel

STUDYING THE INFLUENCE OF SYNTHESIS PARAMETERS ON THE MAGNETIC PROPERTIES OF CoNi FERRITES

The influence of synthesis conditions on saturation magnetization and coercive force of NiCo ferrites, which were obtained under the action of low-temperature contact nonequilibrium plasma (CNP), is investigated. The main influencing factors were the initial pH of the solution, the treatment temperature and the duration of plasma treatment. Mathematical equations adequately describe the obtained dependences. The results showed that the pH of the reaction medium is the parameter that most affects the magnetic hysteresis for samples obtained by processing CNP.

Thermodegradation Effects in Thick-film Elements Based on Spinel Ceramic of Cu- and Co-enriched Compositions

The modern state-of-the-art and perspectives to resolve the problem on negative temperature coefficient thermistor element for sensor electronics were analyzed. It was shown that thick-film technology in application to mixed transition-metal oximanganite ceramics is one of the most effective ways to achieve the final purpose — the elaboration of wide range of thermistors with high stability of their exploitation properties.

Mineralogical and geodynamical conditions of transformation of peridotites from ophiolites in the Marmarosh zone roc

Purpose. The purpose of our research is to reconstruct geodynamic condition of transformation of Marmaroch zone peridotites. This investigation is based on the study of rock petrography, chemical composition of minerals and recognizing of thermodynamic condition of mineral formation. Methodology. The occurrences of peridotites bodies in the basin of Mala Ugolka and Velyka Ugolka river have been studied.