Influence of the Ca/P ratio on the morphology of fluorapatite crystals in SiO2-Al2O3-CaO-P2O5-K2O-F- glass-ceramics

The formation of fluorapatite crystals with needle-like morphology was studied in glass-ceramics (GCs) of the system SiO2-Al2O3-CaO-P2O5-K2O-F-. XRD, 31P and 27Al NMR, SEM, temperature-dependent electric conductance measurements, and TEM with energy dispersive X-ray analysis were used to study the i...

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Veröffentlicht in:	Journal of non-crystalline solids 2001-08, Vol.289 (1-3), p.123-134
Hauptverfasser:	MOISESCU, C, HÖCHE, T, CARL, G, KEDING, R, RÜSSEL, C, HEERDEGEN, W. D
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Methods of crystal growth physics of crystal growth Physics Theory and models of crystal growth physics of crystal growth, crystal morphology and orientation
Online-Zugang:	Volltext
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Zusammenfassung:	The formation of fluorapatite crystals with needle-like morphology was studied in glass-ceramics (GCs) of the system SiO2-Al2O3-CaO-P2O5-K2O-F-. XRD, 31P and 27Al NMR, SEM, temperature-dependent electric conductance measurements, and TEM with energy dispersive X-ray analysis were used to study the influence of the Ca/P ratio of the starting glass composition on the apatite crystal morphology. The composition of the ambient glass hosting apatite crystals and particularly the calcium supersaturation herein is the key to an understanding of the apatite crystal morphology observed. 29 refs.
ISSN:	0022-3093 1873-4812
DOI:	10.1016/S0022-3093(01)00712-8