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Abstract  

New glasses have been synthesized in the system ZrF46BaF26PrF3. Glasses were prepared by conventional fusion method and the vitreous domain was established. For vitreous samples the thermal stability parameters were determined, so that the best compositions could be selected according to a compromise between high glass forming ability and thermal stability vs. crystallization.

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Journal of Thermal Analysis and Calorimetry
Authors: J. Delben, P. Candelorio, F. de Oliveira, T. Spontoni, Angela Delben, M. Coelho, and L. Andrade

Abstract  

Petroleum natural gas (PNG) reserves will last even when the oil reserves are exhausted, requiring the development of technologies for PNG storage. Activated charcoal is the best material for such a purpose. Under vacuum samples of aroeira (Astronium Urundeuva) underwent pyrolysis in diverse conditions. The samples were characterized by thermal analysis, scanning electronic microscopy and infrared spectroscopy. When the pyrolysis temperature increased, mechanical anisotropy resistance tended to disappear. The pyrolysis became complete only at high temperatures and using a long time of treatment.

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