Published in Refractories and Industrial Ceramics
The chemical purity of fused corundum was demonstrated experimentally to improve after high-temperature (~1750°C) vacuum (~10–5 mm Hg) roasting. Three industrial fused corundum samples with different particle-size and impurity profiles were heat treated, after which the impurity contents decreased by an order of magnitude. The samples were practica...
Published in Refractories and Industrial Ceramics
The effect of refractory product structure on such operational properties as slag resistance and thermal shock resistance is considered. The specimens used are conventional chamotte refractory (standard) and chamotte refractory prepared by new technology using variable pressing pressure. It is shown that porosity, slag resistance, and thermal shock...
Published in Refractories and Industrial Ceramics
The properties of traditional refractory concrete modified by means of microsilica and the deflocculant, including the different types of chamotte filler are studied. It is established that refractory concrete with chamotte filler Bos145 (containing 44% of has lower open porosity, and both high density and ultimate strength in compression compared ...
Published in Refractories and Industrial Ceramics
The sialon-to-ZrB2 ratio during spark-plasma sintering at pressing load 75 MPa and 1200 – 1600°C influenced the phase composition, Si3N4 and Al2O3 contents in sialon, microstructure and grain size of crystalline phases, relative density, open porosity, linear shrinkage, physicomechanical properties, and the linear correlation between the elasticity...
Published in Refractories and Industrial Ceramics
The Acknowledgement on page 105 should read The work was financially supported by the Ministry of Education and Science of the RF under a State Task for Scientific Activity, Project No. 9.1372.2017/4.6.
Published in Refractories and Industrial Ceramics
The Acknowledgement on page 289 should read The work was financially supported by the Ministry of Education and Science of the RF under a State Task for Scientific Activity, Project No. 9.1372.2017/4.6.
Published in Refractories and Industrial Ceramics
High-density (with a relative density of up to 98.8%) ultra-high-temperature ceramic materials (UHTCs) based on the ZrB2–TaC–SiC system were obtained by hot pressing for 15 min at 2000°C 30 MPa of pressure in an argon atmosphere. Phase composition, lattice parameters, microstructure, flexural strength, Vickers hardness and crack resistance were stu...
Published in Refractories and Industrial Ceramics
Results are provided for a study of the strength properties of both individual fractions and also mixtures based upon them. It is established that in order to reduce filler electrical conductivity there should be a reduction in granule diameter or creation of denser polydispersed compositions. Introduction into a charge composition of corundum fill...
Published in Refractories and Industrial Ceramics
We describe the operating parameters of high-production-capacity container-glass melting furnaces and specify the service conditions of the melting-tank lining at a specific glass-melt production rate of 2.5 – 3.0 t/(m2·d) and a specific glass production per furnace run of 7000 – 8000 metric tons/m2. We recommend that melt-molded baddeleyite-corund...
Published in Refractories and Industrial Ceramics
A procedure for modeling phase formation in the multicomponent CaO–MgO–Al2O3–SiO2–FeO–Fe2O3 oxide system has been proposed. This procedure can be used to predict the equilibrium phase composition of both the refractory and refractory-slag systems in order to modify the chemical composition of smelter slags, improve the service life of the lining of...
