Structural features of fumed silica and alumina alone, blend powders and fumed binary systems

Effect of Mechanical Activation of Highly Disperse SiO$_{2}$/$\alpha$-Fe$_{2}$O$_{3}$ Mixtures on Distribution of Valence Electrons

“…In order to analyse the effect of mechanical activation on interatomic interactions, namely on a character of electron distributions in oxygen, silicon, and iron atoms, it is necessary to determine the energy regions, where Op, Sisd, and Fesd valence electrons localize for the studied materials. The energy distributions of valence electrons in various silicas were analysed in detail elsewhere [24][25][26]. It is shown [24][25][26], that lower subband corresponds to covalent-binding states in silica, and the high-energy OK  band describes non-binding electronic states occupied by electrons transferred from silicon to oxygen.…”

“…The energy and charge states of ions depend on energy redistribution of valence electrons of atoms of surface layers of nanoparticles with developed surface area as in nanosize SiO 2 and -Fe 2 O 3 [12][13][14][15][16][17][18][19][20][21][22][23]. Properties of such materials in nanocomposites are reciprocally supplemented [24][25][26][27]. Thus, it is important to investigate the electronic structure depending on composition of such nanomaterials and synthesis method.…”

Preparation of Silica-Alumina Nanoparticles via Blast-Furnace Slag Dissolution in Low-Concentration Acetic Acid for Carbonation

“…In view of this, it is interesting to find that silica and alumina nanoparticles in either single or mixed states are as important as more expensive materials used in the ceramics industry or as additives in the polymer industry, for example as conventional inorganic fillers. Furthermore, binary silica-alumina aerogels are among the most widely studied silica-based, mixed oxide aerogels [12][13][14].…”