A study is made of the effect of dispersant additives on the properties of a mix and a fired material containing hollow corundum microspheres. It is shown tht the addition of CASTAMENT FS10 together with CASTAMENT FW 10 makes it possible to obtain a green product having an ultimate compressive strength of at least 2 MPa. The fired material is slightly less porous than the material without dispersant additives. Heat-insulating ceramics based on hollow corundum microspheres and having an open porosity of at least 50.7% and an ultimate compressive strength of at least 35 MPa are obtained after firing at 1600°C. The material shrinks no more than 0.2% during the firing operation, which has made it possible to make large products of complex shape and ship them to customers.
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This research was conducted with financial support from the Ministry of Education and Science of the Russian Federation in concert with Federal incentive program “Research and Development in Fields that are a High Priority for the Growth of the Scientific-Industrial Complex in Russia during the Period 2014 – 2020.” The study was performed as part of the R&D program “Developing Technologies to Make Large Ceramic Products of Complex Shape for Different Sectors of Industry on the Basis of Highly Concentrated Nano-Modified Suspensions” [Contract No. 14.577.21.0009; unique identifier for applied scientific studies (projects) RFMEF157714X0009] performed on equipment in the “Science-Intensive Technologies in Machine-Building” Center for Collective Use at Moscow State Industrial University.
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Translated from Novye Ogneupory, No. 12, pp. 29 – 31, December, 2014.
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Krasnyi, B.L., Tarasovskii, V.P., Krasnyi, A.B. et al. Heat-Insulating Refractory Material Based on Hollow Corundum Microspheres. Refract Ind Ceram 55, 559–561 (2015). https://doi.org/10.1007/s11148-015-9764-x
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DOI: https://doi.org/10.1007/s11148-015-9764-x