This paper reports a systematic investigation on Mg-substituted hydroxyapatite (Ca10-xMgx(PO4)(6)(OH)(2)) nanopowders produced by precipitation of Ca(NO3)(2)center dot 4H(2)O and Mg(NO3)(2). The Mg content ranged between 0.6 and 2.4 wt%. Semicrystalline Mg-substituted hydroxyapatite powders made up of needle-like nanoparticles were obtained, the specific surface area ranged between 87 and 142 m(2)/g. Pure hydroxyapatite nanopowder decomposed around 1000 degrees C. Mg-substituted hydroxyapatites were thermally stable up to 660 degrees C (x = 1.0), 760 degrees C (x = 0.5) and 840 degrees C (x=0.25) showing a distinct decreased thermal stability with respect to the pure sample. A relevant displacement of the sintering curve at lower temperature as a function of Mg content was observed, comparing to the behaviour of a pure HAp material, synthesized following the same procedure, and ascribed to the beta-TCP formation. (C) 2009 Elsevier Ltd. All rights reserved.

Cacciotti, I., Bianco, A., Lombardi, M., Montanaro, L. (2009). Mg-substituted hydroxyapatite nanopowders: Synthesis, thermal stability and sintering behaviour. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 29(14), 2969-2978 [10.1016/j.jeurceramsoc.2009.04.038].

Mg-substituted hydroxyapatite nanopowders: Synthesis, thermal stability and sintering behaviour

BIANCO, ALESSANDRA;
2009-01-01

Abstract

This paper reports a systematic investigation on Mg-substituted hydroxyapatite (Ca10-xMgx(PO4)(6)(OH)(2)) nanopowders produced by precipitation of Ca(NO3)(2)center dot 4H(2)O and Mg(NO3)(2). The Mg content ranged between 0.6 and 2.4 wt%. Semicrystalline Mg-substituted hydroxyapatite powders made up of needle-like nanoparticles were obtained, the specific surface area ranged between 87 and 142 m(2)/g. Pure hydroxyapatite nanopowder decomposed around 1000 degrees C. Mg-substituted hydroxyapatites were thermally stable up to 660 degrees C (x = 1.0), 760 degrees C (x = 0.5) and 840 degrees C (x=0.25) showing a distinct decreased thermal stability with respect to the pure sample. A relevant displacement of the sintering curve at lower temperature as a function of Mg content was observed, comparing to the behaviour of a pure HAp material, synthesized following the same procedure, and ascribed to the beta-TCP formation. (C) 2009 Elsevier Ltd. All rights reserved.
2009
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
Italian
Con Impact Factor ISI
Powders-chemical preparation; Microstructure; Thermal properties; Apatite; Biomedical applications
Cacciotti, I., Bianco, A., Lombardi, M., Montanaro, L. (2009). Mg-substituted hydroxyapatite nanopowders: Synthesis, thermal stability and sintering behaviour. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 29(14), 2969-2978 [10.1016/j.jeurceramsoc.2009.04.038].
Cacciotti, I; Bianco, A; Lombardi, M; Montanaro, L
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/25502
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