Phosphoric acid rate addition effect in the hydroxyapatite synthesis by neutralization method

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dc.contributor.authorGOUVEIA, D.S.pt_BR
dc.contributor.authorBRESSIANI, A.H.A.pt_BR
dc.contributor.authorBRESSIANI, J.C.pt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2014-07-15T13:46:48Zpt_BR
dc.date.accessioned2014-07-30T11:50:20Z
dc.date.available2014-07-15T13:46:48Zpt_BR
dc.date.available2014-07-30T11:50:20Z
dc.date.issued2006pt_BR
dc.description.abstractCalcium phosphates with different Ca/P molar ratio can be obtained depending the precipitation conditions such as pH and temperature. In this work the effect of the pH's variation during the H3PO4 addition in the synthesis of hydroxyapatite-HA, (Ca/P molar ratio 1.67) by neutralization method, was studied. The H3PO4 addition's rate was 1.0, 1.5, 8.0 mL.min-1 and in other experiment the H 3PO4 was added at a time. After the addition was completed the pH ranged from 7-12. The suspensions were kept during 24 hours for ripening. The precipitate was separated from the suspension by vacuum filtration, washed with distilled water and dried at 70°C/24h. Afterwards the materials were analyzed by thermogravimetric analysis (TGA) with heating rate of 10°C/min in air. The calcination of the powders was accomplished at 800°C/3h with heating rate of 10°C.min-1. The powders were characterized by X-ray diffraction (XRD), infrared spectrometry (FTIR), specific surface area (BET), and scanning electron microscopy (SEM). The results indicated that the ratio of addition of the acid can influence both the morphology and the formation of the phases (HA and TCP) in the obtained powders.
dc.format.extent593-598pt_BR
dc.identifier.citationGOUVEIA, D.S.; BRESSIANI, A.H.A.; BRESSIANI, J.C. Phosphoric acid rate addition effect in the hydroxyapatite synthesis by neutralization method. <b>Materials Science Forum</b>, v. 530-531, p. 593-598, 2006. DOI: <a href="https://dx.doi.org/10.4028/www.scientific.net/MSF.530-531.593">10.4028/www.scientific.net/MSF.530-531.593</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/5319.
dc.identifier.doi10.4028/www.scientific.net/MSF.530-531.593
dc.identifier.issn0255-5476pt_BR
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/5319pt_BR
dc.identifier.vol530-531pt_BR
dc.relation.ispartofMaterials Science Forumpt_BR
dc.rightsopenAccessen
dc.subjectphosphoric acidpt_BR
dc.subjecthydroxidespt_BR
dc.subjectapatitespt_BR
dc.subjectcalcium phosphatespt_BR
dc.subjectsynthesispt_BR
dc.subjectph valuept_BR
dc.subjectthermogravimetric analysispt_BR
dc.subjectpowderspt_BR
dc.subjectx-ray diffractionpt_BR
dc.subjectinfrared spectrapt_BR
dc.subjectscanning electron microscopypt_BR
dc.titlePhosphoric acid rate addition effect in the hydroxyapatite synthesis by neutralization methodpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorJOSE CARLOS BRESSIANI
ipen.autorANA HELENA DE ALMEIDA BRESSIANI
ipen.autorDEIBY SANTOS GOUVEIA
ipen.codigoautor1459
ipen.codigoautor96
ipen.codigoautor3285
ipen.contributor.ipenauthorJOSE CARLOS BRESSIANI
ipen.contributor.ipenauthorANA HELENA DE ALMEIDA BRESSIANI
ipen.contributor.ipenauthorDEIBY SANTOS GOUVEIA
ipen.date.recebimento07-10pt_BR
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.ipendoc11880pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationf9cbec71-8864-4175-998d-637777f90c2d
relation.isAuthorOfPublication04d834e7-faee-4461-8fa7-5e5071ec48cc
relation.isAuthorOfPublication0b8040e6-6de7-45ec-aebc-1b94c9cafcfa
relation.isAuthorOfPublication.latestForDiscovery0b8040e6-6de7-45ec-aebc-1b94c9cafcfa
sigepi.autor.atividadeGOUVEIA, D.S.:3285:34:Spt_BR
sigepi.autor.atividadeBRESSIANI, A.H.A.:96:34:Npt_BR
sigepi.autor.atividadeBRESSIANI, J.C.:1459:34:Npt_BR
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