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dc.contributor.authorTeixeira, Silvio Rainho-
dc.contributor.authorRomero, Maximina-
dc.contributor.authorRincon, Jesus Ma.-
dc.identifier.citationJournal of The American Ceramic Society. Malden: Wiley-blackwell, v. 93, n. 2, p. 450-455, 2010.-
dc.description.abstractThis work reports the feasibility results of recycling sugar cane bagasse ash (SCBA) to produce glass-ceramic. The major component of this solid residue is SiO2 (>89%). A 100 g batch composition containing ash, CaO and Na2O was melted and afterward, poured into water to produce a glass frit. The crystallization kinetic study by nonisothermal method was performed on powder samples (<63 mu m) at five different heating rates. Wollastonite is the major phase in crystallization at T>970 degrees C, and below this temperature there is a predominance of rankinite. The crystallization activation energies calculated by the Kissinger and Ligero methods are equivalent: 374 +/- 10 and 378 +/- 13 kJ/mol. The growth morphology parameters have equal values n = m = 1.5 indicating that bulk nucleation is the dominant mechanism in this crystallization process, where there is a three-dimensional growth of crystals with polyhedron-like morphology controlled by diffusion from a constant number of nuclei. However, differential thermal analysis (DTA) curves on both monolithic and powder glass samples suggest that crystallization of the powder glass sample occurs through a surface mechanism. The divergence in both results suggests that the early stage of surface crystallization occurs through a three-dimensional growth of crystals, which will then transform to one-dimensional growth.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.sourceWeb of Science-
dc.titleCrystallization of SiO2-CaO-Na2O Glass Using Sugarcane Bagasse Ash as Silica Sourceen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUNESP, Dept Fis Quim & Biol, BR-19060080 Presidente Prudente, SP, Brazil-
dc.description.affiliationCSIC, Eduardo Torroja Inst Construct Sci, Dept Bldg Construct Syst, Madrid 28033, Spain-
dc.description.affiliationUnespUNESP, Dept Fis Quim & Biol, BR-19060080 Presidente Prudente, SP, Brazil-
dc.description.sponsorshipIdFAPESP: 04368-4/08-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of the American Ceramic Society-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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