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Nanostructural Transitions in Bioactive Sol–Gel Silicate Glasses
Author(s) -
Aguiar Hélio,
Serra Julia,
González Pío
Publication year - 2011
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02633.x
Subject(s) - materials science , magic angle spinning , sol gel , bioactive glass , nanostructure , transmission electron microscopy , silicate , fourier transform infrared spectroscopy , silica glass , chemical engineering , magic angle , mineralogy , high resolution transmission electron microscopy , nanotechnology , composite material , nuclear magnetic resonance , nuclear magnetic resonance spectroscopy , chemistry , physics , engineering
A study of the short‐range organization of bioactive SiO 2 –P 2 O 5 –CaO sol–gel glasses using high‐resolution transmission electron microscopy, Fourier transform infrared and magic angle spinning—nuclear magnetic resonance spectroscopies are reported. These combined techniques were used to investigate the rearrangement of the glass matrix and to clarify the role of phosphorus and calcium during the heat‐treatment stage of the sol–gel process. The study shows how the incorporation of calcium into the glass structure promotes the appearence of P–O–NBO groups and that the glass nanostructure is induced to form Ca‐rich orthophosphate units.