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DYNA

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Abstract

VARGAS, FABIO et al. SILICON CARBIDE TUBES FABRICATION FOR RADIANT FURNACES AND HEATING SYSTEMS. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.157, pp.233-242. ISSN 0012-7353.

Silicon carbide is a useful material in furnaces and heating systems because its high thermal conductivity, refractory, dimensional and mechanical stability to high temperature until 1650°C. In spite of its excellent thermal properties, utilization of silicon carbide in furnaces and heating systems has been limited for two factors: its oxidation due to temperatures higher than 1100°C and its low plasticity, reasons for which it’s shaped can become difficult by the conventional process normally used for shape ceramic materials. In order to solve the shape problem a paste was made. This paste was prepared using two different size particles (180 µm y 7 µm) with a relation of 70/30 weight, respectively. The SiC particles were agglomerated by a watery solution of 7,5% weight of celullose Type B plasticizer developed at laboratory. 15 ml of watery solution for each 100 grams of SiC were used. The paste let us obtain silicon carbide tubes by centrifugal technique, which reached out good physical and thermal properties to be used in radiant furnaces and heating systems applications.

Keywords : radiant tube; silicon carbide; heat transfer; radiation.

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