Open AccessSlag resistant and refractory ceramic compositions in MgO – Al2O3 – SiO2 system on the base of local raw materials of Uzbekistan
Author(s) -
Z. A. Babakhanova,
M. Kh. Aripova
Publication year - 2021
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/1091/1/012057
Subject(s) - ceramic , materials science , raw material , refractory (planetary science) , slag (welding) , metallurgy , base (topology) , mineralogy , geology , chemistry , mathematical analysis , mathematics , organic chemistry
Forsterite and spinel-corundum ceramic materials were obtained in the MgO-Al 2 O 3 -SiO 2 system based on local raw materials of Uzbekistan - talc-magnesite of Zinelbulak deposit, kaolin of Angren deposit and inorganic additives (fused periclase PPE-87, electric fused corundum). The formations of various phases were studied using XRD and SEM-EDS. Study of chemical-mechanical properties of ceramic samples showed that spinel-corundum composition have density from 2520 to 2770 kg/m 3 , water absorption rate from 10.52 to 11.71%, open porosity from 27 to 31%, apparent density from 2420 to 2750 kg/m 3 , compressive strength from 100 to 120 MPa, characterized by increased refractoriness (it was 1750 °C for forsterite ceramic materials, for spinel-corundum more than 1800 °C) and slag resistance under metallurgy slags. The synthesis of spinel in optimal compositions occurs at 300 °C lower than the traditional sintering temperature of spinel products, which contributes to significant energy savings in the synthesis of highly refractory spinel-corundum materials.