African Journal of
Pure and Applied Chemistry

  • Abbreviation: Afr. J. Pure Appl. Chem.
  • Language: English
  • ISSN: 1996-0840
  • DOI: 10.5897/AJPAC
  • Start Year: 2007
  • Published Articles: 357

Full Length Research Paper

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

Rafael Jordán Hernández1, Tania Faría Piñera1, Gerardo Rodríguez- Fuentes1, Gerardo C. Díaz Trujillo2 and María E. Zayas Saucedo3
Zeolites Engineering Laboratory, Institute of Science and Technology of the Materials, Havana University, Cuba. 2Chemistry Faculty, Baja California, México. 3Physics Faculty, Sonora University, México
Email: [email protected]

  •  Accepted: 07 November 2007
  •  Published: 30 November 2007

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 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.

 

Key words: Glass, volcanic tuff, endothermic peaks.