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

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

doi:10.15330/pcss.22.3.516-521

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 Opπ-binding states.

Highlights

Oxides of transition and semi-transition metals have a wide range of special properties, which are widely used in the field of semiconductor electronics, information storage, solar and renewable energy, etc. [1,2,3,4,5]
Based on the assumption that any treatment is accompanied by energy transfer, and the processing time may correlate with the amount of this energy provided to the system, it was decided to determine the optimal time of MBT, which will give the best results of electrochemical analysis
Studies of the effect of MBT time on the morphological features of nanocomposite SA 20 showed that during processing for 3 min there is a slight adhesion of particles to each other, and when processing more than 10 min there is only crushing of agglomerates and increase in bulk density

Summary

Introduction

Oxides of transition and semi-transition metals have a wide range of special properties, which are widely used in the field of semiconductor electronics, information storage, solar and renewable energy, etc. [1,2,3,4,5]. Energy efficiency, and the cost-effectiveness of these methods is quite low, so it is more appropriate to use the method of shockvibration treatment on micro-breaker, which can provide the same result, but for a shorter period of time. In previous works [7,8,9,10] it was shown that this method of processing is quite effective in the processing of nanocomposites. It is not known how the processing time of this method affects the energy efficiency of this method. It is advisable to conduct such studies for a promising mixture 0.8SiO2/0.2Al2О3, which is very promising for use as an electrode material of lithium current sources

Methods

Results

Conclusion