15 KB240 KB13 KB200020242013Baştan, Fatih ErdemDemiralp, EzgiÖzbek, Yildiz YaraliÜstel, Fatihštevilka:3letnik:47str. 303-306ISSN:1580-2949COBISSID:998314URN:URN:NBN:SI:doc-HWFEK3OXenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeatomizacijahidroksiapatitkalcijev fosfatprecipitacijaThe effect of binder on chemically precipitated hydroxyapatite during spray drying| Vpliv veziva na kemijsko izločeni hidroksiapatit med atomizacijo|The synthesis of appropriate calcium phosphate powders for thermal-spraying applications is a fundamental, crucial stage in the production of bioceramical coatings coupled with the desired characteristics. The performance, lifespan and quality of the resulting biological coating in-vivo is largely dependent on the coating morphology, phase composition, particle size and the crystallites of the spray powders. In order to achieve very reliable coatings from thermal-spray processes, spherical powders of a specified size distribution are recommended. The aim of this work was to produce hydroxyapatite powder with a chemical precipitation method and to reshape it in a spray dryer and investigate the effect of binder on the powder structure to provide an insight into the preparation and characterization aspect of HA powders using the spray-drying process. Ethanol, pure water and polyvinilalcohol (PVA) + ethanol were used as the binder. Different temperatures were applied in the spray dryer. Then, the precipitated, spray-dried powders were examined for morphology. Scanning electron microscopy (SEM), X-ray diffraction (XRD), (EDX) and ICP were used to characterize the specimen powdersSinteza primernega prahu kalcijevega fosfata za termično naprševanje, povezana z želenimi lastnostmi, je osnovna in ključna faza pri izdelavi biokeramičnih prevlek. Uspešnost, zdržljivost in kvaliteta biološke prevleke v živo je močno odvisna od morfologije prevleke, fazne sestave, velikosti delcev in kristalnih zrn napršenega prahu. Za zagotovitev zelo zanesljivega premaza se priporoča uporaba prahu z okroglimi delci določene porazdelitve velikosti zrn. Cilj tega dela je izdelati prah hidroksiapatita (HA) z metodo kemijskega izločanja, s preoblikovanjem z atomizacijo in preiskati učinek veziva na strukturo prahu, da bi dobili vpogled v načine priprave in karakterizacijo HA-prahov z atomizacijo. Kot veziva so bili uporabljeni etanol, čista voda in polivinil alkohol, (PVA) + etanol. Pri atomizaciji so bile uporabljene različne temperature. Nato je bila pregledana morfologija atomiziranega prahu. Karakterizacija vzorcev prahov je bila izvršena z vrstično elektronsko mikroskopijo (SEM), rentgensko difrakcijo (XRD), energijsko disperzijsko rentgensko spektroskopijo (EDX) in induktivno sklopljeno plazmo (ICP)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije