Obtenção do carboneto de silício pela redução carbotérmica da sílica / SYNTHESIS OF SILICION CARBIDE BY CARBOTHERMAL REDUCTION OF SILICA

AUTOR(ES)

João Luis Abel

DATA DE PUBLICAÇÃO

2009

RESUMO

The production of silicon carbide (SiC) in an industrial scale still by carbothermal reduction of silica . This study aims to identify, in a comparative way, among the common reducers like petroleum coke, carbon black, charcoal and graphite the carbothermal reduction of silica from the peat. It is shown, that the peat, also occurs in nature together with high purity silica sand deposits, where the proximity of raw materials and their quality are key elements that determine the type, purity and cost of production of SiC. Tests were running from samples produced in the electric resistance furnace with controlled atmosphere at temperatures of 1550ºC, 1600°C and 1650°C, both the precursors and products of reaction of carbothermal reduction were characterized by applying techniques of X-ray diffraction, scanning electron microscopy (SEM) and Energy-Dispersive X-ray analysis Spectroscopy (EDS). The results showed the formation of SiC for all common reducers, as well as for peat, but it was not possible to realize clearly the difference between them, being necessary, specific tests.

ASSUNTO(S)

redução carbotérmica turfa carboneto de silício sílica carboneto de silício sílica redução carbotérmica turfa

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