Application of Magnesite Waste in Manufacturing High-strength Ceramics

Салахов, А М; Ariskina, Kristina A.; Ariskina, Regina

doi:10.18599/grs.18.3.15

Cited by 6 publications

(2 citation statements)

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“…Off-spec silica raw materials and industrial mineral waste can be used as additional raw material source [1][2][3][4][5]. At the same time, slow development of technogenic deposits for ceramic products manufacturing is connected with insufficient previous studies on physico-chemical processes that occur while burning such raw materials [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Macromodel of interfacial transition layer in ceramic matrix composites

et al. 2018

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Abstract. The purpose of the study is to create a macromodel of interfacial transition layer in ceramic matrix composites. Chemical and mineralogical compositions were investigated by means of X-ray fluorescence analysis and X-ray diffractometry, ceramic and technological properties of raw materials were defined using standard test methods for argillaceous raw materials. Phase composition and structure of ceramic specimens were studied using a complex of modern physico-chemical analysis methods. The layer-by-layer model of shell-core transition in ceramic matrix material was suggested. Boundary conditions for obtaining specimens were defined in terms of number of layers, thickness of such layers and pitch of core-to-shell material ratio. Forced air supply was organized while burning for directed heat and mass transfer inside the specimens. Mineral composition of layers was defined for ceramic specimens with the core of iron ore waste and the shell of clay. The study enabled to determine dependences between qualitative and semiquantitative variation of new mineral formations content in transitional layers of a composite, which is the evidence of interaction between the core and the shell products while burning a ceramic matrix material.

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Section: Introductionmentioning

confidence: 99%

Macromodel of interfacial transition layer in ceramic matrix composites

et al. 2018

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“…The issues of complex modification of clay raw materials and the use of technogenic raw materials for this purpose, which provide an intensifying effect on the processes of phase formation and structure formation in a ceramic shard, are devoted to a number of scientific developments [3][4][5]. The experience of using magnesite waste in the technology of manufacturing high-strength ceramics [6], man-made serpentinite raw materials [7], the use of industrial waste for the production of ceramic building materials [8,9].…”

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confidence: 99%

Activated ceramic compositions with the addition of serpentinite

2018

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The article describes the loam of the Kubekovsky deposit of the Krasnoyarsk Territory, which is widely used in the production of ceramic bricks in factories that produce wall materials. In the studies described in the article, mechanoactivation and modification were used to improve its technological and physico-mechanical characteristics. Mechanoactivation was carried out in a hydrodynamic dispersant. As the additive-modifier used waste stoneplant serpentinites of the Perevalnoye deposit. The effect of the additive-modifier on the properties of ceramic compositions is shown. It is shown that a small amount of serpentinite up to three percent -significantly increases the compressive strength of fired ceramic samples.If the composition has an additive of more than three percent, a decrease in strength characteristics is observed, this is related, probably due to the fact that most of the magnesium oxide remains unreacted. White inclusions areobserved visually in the structure of calcined samples throughout the volume. The combined effect of mechanoactivation and modification is shown, which makes it possible to improve the technological and physicomechanical characteristics of the ceramic shard. The results of electron microscopy are presented, suggesting that the microstructure of a ceramic shard activated with the addition of serpentinite contains moremullite-rich mixed crystals, as well as devitrified areas. Inclusions of magnesium oxide are not observed. Magnesium oxide in the ceramiccomposition serves as a primer capable of making the melt more liquid,accelerating its devitrification.

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