| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Fojud, Zbigniew
Adam Mickiewicz University in Poznań
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2020Phase transitions, molecular dynamics and structural properties of 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquidcitations
- 2010Molecular dynamics in grafted polydimethylsiloxanescitations
- 2009Crystal structure, electric field gradient, and electronic charge densities in ReB<inf>2</inf>: A single crystal x-ray, B<sup>11</sup> nuclear magnetic resonance, and first-principles studycitations
- 2009The aluminium effect on the structure of silico-phosphate glasses studied by NMR and FTIRcitations
- 2008Redetermination of the structure and dielectric properties of bis(thiourea) pyridinium iodide - A new ferroelectric inclusion compoundcitations
- 2005Spectroscopic studies of poly(ε-caprolactone)/sodium montmorillonite nanocompositescitations
- 2005Structure of multicomponent SiO<inf>2</inf>-Al<inf>2</inf>O <inf>3</inf>-Fe<inf>2</inf>O<inf>3</inf>-CaO-MgO glasses for the preparation of fibrous insulating materialscitations
Places of action
| Organizations | Location | People |
|---|
article
The aluminium effect on the structure of silico-phosphate glasses studied by NMR and FTIR
Abstract
<p>Silico-phosphate glasses of NaCaPO<sub>4</sub>-SiO<sub>2</sub> and NaCaPO<sub>4</sub>-AlPO<sub>4</sub>-SiO<sub>2</sub> system have been the subject of the presented investigations. Glasses of these systems are the basis for the preparation of glassy-crystalline biomaterials [R.D. Rawlings, Clin. Mater. 14 (1993) 155]. Detailed knowledge of the precursor glass structure is necessary for proper design of the glassy-crystalline biomaterials preparation procedure. Since there is no long-range ordering in glasses, spectroscopic methods which make it possible to study the short range ordering should be applied. MIR studies carried out in the work have allowed to establish that the glasses of the systems studied show domain composition [L.L. Hench, R.J. Splinter, T.K. Greenlee, W.C. Allen, J. Biol. Res. Symp. 2 (1971) 117; L.L. Hench, R.J. Splinter, W.C. Allen, T.K. Greenlee, J. Biol. Res. 5 (1972) 117]. Domain structure is close to that of the corresponding crystalline phases. It has been shown that even small amount of aluminium in the glass (5 mol.% of AlPO<sub>4</sub>) significantly influences both, its texture (microscopic and EDX studies) and its structure (spectroscopic studies). <sup>27</sup>Al NMR investigations have made it possible to establish unequivocally that aluminium occurs exclusively in tetrahedral coordination, i.e. it is involved in the formation of glass framework. Presence of aluminium results in significant changes in the [SiO<sub>4</sub>]<sup>4-</sup> and [PO<sub>4</sub>]<sup>3-</sup> tetrahedra environment which is reflected in <sup>23</sup>Na, <sup>31</sup>P and <sup>29</sup>Si NMR spectra. Changes in the shapes and positions of the bands in the NMR spectra of glasses belonging to the NaCaPO<sub>4</sub>-AlPO<sub>4</sub>-SiO<sub>2</sub> system confirm great influence of aluminium on silico-phosphate glasses structure. © 2008 Elsevier B.V. All rights reserved.</p>