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Open Access item Nucleation and crystal growth of glasses produced by a generic plasma arc -process

Authors:Hernández, M. S.
Romero, Maximina
Rincón López, Jesús María
Keywords:Nucleation, Crystallisation, Sintering, Glass-ceramics, Plasma arc vitrification, Hospital wastes
Issue Date:2006
Citation:Journal of the European Ceramic Society 26 (2006) 1679–1685
Abstract:The feasibility to crystallise a glass prepared by thermal plasma vitrification of hospital wastes to produce a glass-ceramic suitable to be used as a construction material was investigated by using differential thermal analysis (DTA) and X-ray diffraction (XRD). Two crystallisation exotherms in DTA were attributed to the formation of wollastonite and a crystalline phase belonging to the melilite group (gehlenite or akermanite). DTA tests have shown that the glass is not suitable for bulk crystallisation and must be converted into a glass-ceramic by using the sintering process route through a single crystallisation step at 1000 ◦C for 10 min.
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