Obtenção de pó de quartzo de elevada pureza por meio de tratamentos químicos para a produção de sílica vítrea

Abstract

Vitreous silica, a type of glass made of molten quartz, is a component of a scientific structure, such as the spectrometer and an ultraviolet, and is a strategic entry into the computer industry. Although Brazil is one of the largest reserves of quartz in the world, the treatment of quartz by means of chemical treatments is little explored in the country. Thus, a silica is not produced in the national territory, but imported. The success of high-quality silica is linked to the purity of the raw material. The quartz powder should have a degree of purity above 99% for the child to produce a superior quality. An alternative to reduce the impurities of quartz powder, when natural quartz is not of such high purity, is the chemical treatment. (1h, 3h and 6h) at a temperature of 100 °C with two different acid mixtures. For comparative purposes and as an unexplored alternative for the purification of quartz, it was subjected to a quartz powder in the digestion of the microwave effect. This content was based on the components for the selected components to solubilize, thus increasing the purity of the sample. The theory of silicon oxide content, using the direct creep method in its content, was performed by ICP-OES analysis.