Thermal stability and sintering behaviour of hydroxyapatite nanopowders

Bianco, Alessandra; Cacciotti, Ilaria; Lombardi, Mariangela; Montanaro, Laura; Gusmano, G.

doi:10.1007/s10973-006-8011-6

Cited by 83 publications

(47 citation statements)

References 35 publications

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“…4a) show the characteristic pattern of partially carbonated hydrated HAps as extensively discussed elsewhere [14]. In particular, bands at 3570 and 631 cm À1 , corresponding to the stretching and vibrational mode of the OH À groups, respectively, were evidenced for HAp.…”

Section: Ft-ir Analysis Of Pure and F-substituted Hydroxyapatitessupporting

confidence: 53%

F-substituted hydroxyapatite nanopowders: Thermal stability, sintering behaviour and mechanical properties

Bianco

Cacciotti

Lombardi

et al. 2010

Ceramics International

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120

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Section: Ft-ir Analysis Of Pure and F-substituted Hydroxyapatitessupporting

confidence: 53%

F-substituted hydroxyapatite nanopowders: Thermal stability, sintering behaviour and mechanical properties

Bianco

Cacciotti

Lombardi

et al. 2010

Ceramics International

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120

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“…In the temperature range 200-950°C, small mass loss results from removal of carbonates and chemically bonded water [20,21]. These data are in agreement with the results obtained by Bianco et al [22]. Adsorption of oxalic acid on hydroxyapatite not only changes active centres on the surface and their energies but also affects their thermal stability.…”

Section: Adsorption Of Oxalate Ionssupporting

confidence: 91%

Thermal analysis of hydroxyapatite with adsorbed oxalic acid

Skwarek

2015

J Therm Anal Calorim

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The specific adsorption of oxalic acid ions at the hydroxyapatite interface was investigated by means of the radioisotope method ( 14 C) as a function of oxalic acid ions concentration, NaCl concentration and pH. Application of hydroxyapatite has become extensive in the biomaterial field due to its biocompatibility with human hard tissue. Hydroxyapatite was synthesized using wet methods. Physical properties of the resulting powder were characterized by DTA/TG, XRD, AFM and SEM microscopy. Physicochemical properties characterizing the electrical double layer of the hydroxyapatite/NaCl solution interface were determined. The zeta potential and the adsorption of oxalic acid molecules were studied as a function of pH. The point of zero charge and the isoelectric point of samples were determined: its values are as follows: pH PZC = 7 and pH IEP = 4. Temperature has insignificant influence on pure substance and with oxalic acid adsorbed, as thermal analysis has shown, and characterization of hydroxyapatite structure can be carried out by this thermal analysis. Two phenomena are responsible for oxalic acid adsorption: phosphate group replacement at the hydroxyapatite surface by oxalic ions simultaneous to intraspherical complexes formation.

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“…More details have been published elsewhere. 7 Magnesium-substituted hydroxyapatite powders (MgHAp) of different composition (Ca 10−x Mg x (PO 4 ) 6 (OH) 2 , 0.25 ≤ x ≤ 1.0) were prepared assuming that magnesium ions would substitute for the calcium site in the HAp lattice in order to obtain a nominal composition in term of (Ca + Mg)/P ratio of 1.667 ( …”

Section: Synthesis Of Pure and Mg-substituted Hydroxyapatitementioning

confidence: 99%