Contribution from the employment of volcanic tuffs to the chemistry of soda- lime glasses

Abstract:  This paper 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 show a shoulder at 680oC and an endothermic peak around 840oC corresponding to reactions of formation of silicates. It suffers an overlapping effect toward smaller temperatures favouring glass formation. Citati on: Rafael Jordán Hernández, Tania Faría Piñera, Gerardo Rodríguez- Fuentes, Gerardo C. Díaz Trujillo and María E. Zayas Saucedo, Contribution from the employment of volcanic tuffs to the chemistry of soda- lime glasses, African Journal of Pure and Applied Chemistry Vol. 1 (2), pp. 011-014, 2007.