Integration of volcanic tuffs as raw material in the preparation of industrial glass that uses feldspar

Abstract

The present work shows a study to incorporate volcanic tuffs as raw material in the preparation of industrial
glass that traditionally uses feldspar. The X- ray diffraction patterns obtained with hot camera depict an unstable
mineralogical phase under special conditions of atmospheric pressure in which appears the quartz polymorphic
transformation. Thermal analysis curves present a shoulder at 680
o
C and an endothermic peak around 840
o
C
corresponding to reactions of formation of silicates. It suffers an overlapping effect toward smaller
temperatures favouring glass formation.