http://www.cnr.it/ontology/cnr/individuo/prodotto/ID208377

Hydrothermal alteration of glass to Chrysotile. (Articolo in rivista)

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Bloise A. [1]; Belluso E. [2, 3, 4]; Catalano M. [5]; Barrese E. [1]; Miriello D.[1]; Apollaro C. [1] (2012)
Hydrothermal alteration of glass to Chrysotile.
in Journal of the American Ceramic Society (Online); American Ceramic Society, Westerville, Ohio (Stati Uniti d'America)
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Bloise A. [1]; Belluso E. [2, 3, 4]; Catalano M. [5]; Barrese E. [1]; Miriello D.[1]; Apollaro C. [1] (literal)

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[1] Department of Earth Sciences, University of Calabria, Arcavacata di Rende (CS) 87036, Italy [2] Department of Earth Sciences, University of Torino, Torino 10125, Italy [3] Geosciences and Geo-resources Institute (CNR), Torino section, Torino 10125, Italy [4] NIS Centre of Excellence, Via Quarello 11, Torino 10125, Italy [5] Department of Physics, University of Calabria, Arcavacata di Rende (CS) 87036, Italy (literal)

Titolo

Abstract

Chrysotile fibers were synthesized from glass in hydrothermal conditions. The starting materials were first held at 1650 degrees C and then rapidly quenched down to room temperature. The resulting glass, after the addition of mineralizing agents, was hydrothermically altered in the following conditions: temperature 300 degrees C400 degrees C; pressure 100200 similar to MPa; time 48480 similar to h. X-ray powder diffraction, scanning and transmission electron microscopy were used to examine/study the starting materials and products. Cylindrical fiber morphology was prevalent, but proto-chrysotile was also detected, not entirely showing well-defined crystallinity, as revealed by electron diffraction patterns of selected areas. The mineralizing agent and chemical composition of the glass play an important role in the yield of chrysotile fibers. The effect of growth parameters on the size and abundance of chrysotile fibers is also discussed, in the light of possible recrystallization of glass obtained by thermal treatment of chrysotile-asbestos-containing materials. (literal)

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