The dependence between the structural-morphological features mixes 0.8SiO2/0.2Al2O3 from the time of mechanicall treatment

Yu.V. Yavorsky'; Ya.V. Zaulichny; M.V. Karpets; A.I. Dudka; A.B. Hrubiak; V.V. Moklyak

doi:10.15330/pcss.22.3.516-521

Authors

Yu.V. Yavorsky' National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
Ya.V. Zaulichny National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
M.V. Karpets National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
A.I. Dudka National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
A.B. Hrubiak G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine
V.V. Moklyak G.V. Kurdyumov Institute for Metal Physics

DOI:

https://doi.org/10.15330/pcss.22.3.516-521

Keywords:

mechanical treatment at microbraker, morphology, coherent scattering field, spectra, XRD, distribution of valence electrons

Abstract

This paper highlights the relationship between changes in structural and morphological features, electronic structure and exanging of time mechanical treatment at microbraker (MBT). Scaning electron microscopy revealed a change in the morphological features of nanoscale powders. From the comparison of SEM images of 0.8SiO₂/0.2Al₂О₃ mixture before and after MBT, it is established that due to MBT, the agglomerates of the initial components are simultaneously crushed with perfect mixing particles of oxides between each other and the formation of new agglomerates with a denser structure. The increase in processing time leads to an increase in the density of the nanocomposite. The effect of time of mechanical treatment on the structural parameters and phase composition of mixtures of silicon dioxide and titanium were studied using the method of X-ray structural analysis. The established agglomeration is accompanied by a change in the lattice parameter c with a change in the regions of coherent scattering of crystalline Al₂О₃. Ultra-soft X-ray emission spectroscopy was used to study the distribution of Op-, Sisd- and Alsd- valence electrons in 0.8SiO₂/0.2Al₂О₃ powder mixtures after the different time of mechanicall treatment. An increase in atomic charges has been measured and can be explained by the transfer of electrons from Si and Al to O atoms in split Op_π-binding states.

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