The bBeta to alpha phase transition in tricalcium phosphate (TCP) bioceramics containing different amount of magnesium doping ions was studied in the present work. Mg-doped TCP powder was obtained by solid-state reaction starting from pure calcium carbonate, ammonium phosphate dibasic and magnesium oxide powders. The β to α transformation temperature was identified by dilatometric and thermo-differential analyses. Small pellets produced by uniaxial pressing samples were employed to study the influence of Mg2+ on the transition kinetic, after sintering at 1550°C and subsequent slow or fast cooling down to room temperature. The evolution of β- and α-TCP crystalline phases upon during each thermal treatment was determined by X-ray powder diffraction analysis combined with Rietveld method method-based software An annealing treatment, suitable to reconvert metastable α phase to the more clinically suitable β phase, was also investigated. It is shown that the presence of magnesium within the TCP lattice strongly influences the kinetic of the β ⇄ α phase transition, promoting the spontaneous α→β reconversion even upon fast cooling, or slowing down the β→α transition during heating. Similarly, it allows the α→β transformation in TCP sintered components by optimized annealing treatment at 850°C.
Effect of Mg2+ doping on beta–alpha phase transition in tricalcium phosphate (TCP) bioceramics / Frasnelli, Matteo; Sglavo, Vincenzo Maria. - In: ACTA BIOMATERIALIA. - ISSN 1742-7061. - STAMPA. - 33(2016), pp. 283-289.
|Titolo:||Effect of Mg2+ doping on beta–alpha phase transition in tricalcium phosphate (TCP) bioceramics|
|Autori:||Frasnelli, Matteo; Sglavo, Vincenzo Maria|
|Titolo del periodico:||ACTA BIOMATERIALIA|
|Anno di pubblicazione:||2016|
|Codice identificativo Scopus:||2-s2.0-84959551303|
|Codice identificativo WOS:||WOS:000372688700028|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.actbio.2016.01.015|
|Citazione:||Effect of Mg2+ doping on beta–alpha phase transition in tricalcium phosphate (TCP) bioceramics / Frasnelli, Matteo; Sglavo, Vincenzo Maria. - In: ACTA BIOMATERIALIA. - ISSN 1742-7061. - STAMPA. - 33(2016), pp. 283-289.|
|Appare nelle tipologie:||03.1 Articolo su rivista (Journal article)|
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