Technical Physics Letters
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Obtaining glass ceramics of the MgO-SiO2 system by the plasma melting method
Shekhovtsov V. V.
1, Volokitin O. G.
1, Ushakov V. A.2, Zorin D. A.
2
1Tomsk state university of architecture and building, Tomsk, Russia
2Moscow State University of Civil Engineering, Moscow, Russia
2Moscow State University of Civil Engineering, Moscow, Russia
Email: shehovcov2010@yandex.ru, volokitin_oleg@mail.ru
Results of experimental studies of the synthesis of glass ceramics of the MgO-SiO2 system by plasma melting at the atmospheric pressure are presented. Electron microscopy data showed that, during the melt crystallization with the rate of 287-5 K/s, the surface morphology is represented by a dense packing of rhombic dodecahedral Mg2SiO4 crystals (without open porosity). In this case, the matrix is characterized by the formation of a dense framework with a clear linear arrangement of spherical inclusions corresponding to the MgSiO3 phase. As a result of the plasma melting synthesis, glass ceramics with the density of 3.56 g/cm3 and microhardness of up to 15 GPa was obtained. It is assumed that glass ceramics with such a composition can be considered as an excellent option for the development of a cost-effective high-quality refractory. Keywords: forsterite, glass ceramics, electric arc synthesis.
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