Open AccessAcid-basic surface properties of dispersed fillers based on metal oxides TiO2, Al2O3, CaO and Fe2O3
Author(s) -
Yuliya Danchenko,
Vladimir Andronov,
Elena Barabash,
Evgenіy Rybka,
Anastasiia Khmyrova
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/708/1/012083
Subject(s) - alkalinity , oxide , hematite , hydrate , rutile , adsorption , materials science , inorganic chemistry , chemical composition , calcite , metal , mineral , chemical engineering , alkaline earth metal , mineralogy , chemistry , metallurgy , organic chemistry , engineering
The dispersed oxide fillers of different chemical composition were investigated: rutile (TiO 2 ), alumina (Al 2 O 3 ), calcite (CaO) and hematite (Fe 2 O 3 ). The mineral composition, surface morphology, particle size and specific surface of the fillers were investigated using modern physicochemical methods. It has been established that the acid-alkaline properties of the active surface centers (ASC) and hydroxyl-hydrate layer (HHL) depend on the chemical and mineral nature of the fillers. It is established that with decreasing acidity of the oxide, the desire for its surface to adsorb water molecules from the air increases. As the alkalinity of the oxide increases, the thickness of both the hydroxyl and hydrate surface layers increases in proportion. It is shown that the acid-alkaline properties of the surface correlate with the acid-alkaline properties of the oxides included in the fillers.