Lithium disilicate glass-ceramic obtained by the silica extracted from rice husk

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dc.contributor.authorSANTOS, FELIPE A.pt_BR
dc.contributor.authorSANTOS, CLAUDINEI dospt_BR
dc.contributor.authorRODRIGUES JUNIOR, DURVALpt_BR
dc.contributor.authorLAZAR, DOLORES R.pt_BR
dc.contributor.authorCASTRO, DAYANE F. dept_BR
dc.contributor.authorPINATTI, DALTRO G.pt_BR
dc.contributor.authorCONTE, ROSA A.pt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2014-07-15T13:38:58Zpt_BR
dc.date.accessioned2014-07-30T11:49:38Z
dc.date.available2014-07-15T13:38:58Zpt_BR
dc.date.available2014-07-30T11:49:38Z
dc.date.issued2010pt_BR
dc.description.abstractIn this work lithium disilicate glass-ceramic and glasses based on the Li2O-SiO2 system have been investigated by replacing the high-purity SiO2 starting powder by silica obtained from rice husk. Glasses were developed at the stoichiometric composition of 66%.molSiO2:33%.molLiO2 using SiO2 obtained by thermochemical treatment of rice husk. The influence of rice husk-SiO2 on phase formation, microstructure, hardness and fracture toughness was determined and discussed. Investigations were carried out by means of differential thermal analysis, X-ray fluorescence, X-ray diffractometry and scanning electron microscopy. Amorphous and transparent glasses were obtained after melting. The glasses presented Tg near to 480 0C, crystallization peak at 660 0C in both glasses from different silica sources and Li2Si2O5 as the crystalline phase after heat treatment. The hardness (HV300gF) presented average values near to 430 HV for both high-purity and rice husk silica powders. Fracture toughness measurements present results near to 1.7 MP am1/2 for both compositions.
dc.format.extent414-419pt_BR
dc.identifier.citationSANTOS, FELIPE A.; SANTOS, CLAUDINEI dos; RODRIGUES JUNIOR, DURVAL; LAZAR, DOLORES R.; CASTRO, DAYANE F. de; PINATTI, DALTRO G.; CONTE, ROSA A. Lithium disilicate glass-ceramic obtained by the silica extracted from rice husk. <b>Advances in Science and Technology</b>, v. 63, p. 414-419, 2010. DOI: <a href="https://dx.doi.org/10.4028/www.scientific.net/AST.63.414">10.4028/www.scientific.net/AST.63.414</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/4608.
dc.identifier.doi10.4028/www.scientific.net/AST.63.414
dc.identifier.issn1662-8969pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7384-304X
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/4608pt_BR
dc.identifier.vol63pt_BR
dc.relation.ispartofAdvances in Science and Technologypt_BR
dc.rightsopenAccessen
dc.sourceInternational Ceramics Congress, 12th; Forum on New Materials, 5th Montecatini Terme, Italy, June 6-11, 2010pt_BR
dc.subjectlithium silicatespt_BR
dc.subjectsilicon oxidespt_BR
dc.subjectricept_BR
dc.subjectbiological materialspt_BR
dc.subjectceramicspt_BR
dc.subjectglasspt_BR
dc.subjectprosthesespt_BR
dc.subjectteethpt_BR
dc.titleLithium disilicate glass-ceramic obtained by the silica extracted from rice huskpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorDOLORES RIBEIRO RICCI LAZAR
ipen.codigoautor240
ipen.contributor.ipenauthorDOLORES RIBEIRO RICCI LAZAR
ipen.date.recebimento10-12pt_BR
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.ipendoc16090pt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicatione2f75c76-2269-40cf-b463-bc5207084c5f
relation.isAuthorOfPublication.latestForDiscoverye2f75c76-2269-40cf-b463-bc5207084c5f
sigepi.autor.atividadeLAZAR, DOLORES R.:240:720:Npt_BR

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