Glass - Back to the Future!

Presenting Author:
Mariana Fatobene Ando

article posted 21st March 2016

Mariana Fatobene Ando is PhD student in glass chemistry at Otto Schott Institute of Material Research (OSIM) at Friedrich-Schiller-Universität (Germany) and works with structural investigations of binary glasses for application in optical fibers. She is M.Sc in Nanoscience and Advanced Materials at Universidade Federal do ABC (Brazil) in collaboration with Universidade Estadual de Campinas (Brazil) and has worked with tellurite glasses doped with rare-earth for optical amplifiers.

Are there P-O-P bonds in phosphosilicate glasses with low P2O5-content?

Sindy Fuhrmann 1, Mariana Fatobene Ando* 1,2, Christoph Domscheit 1, Grégory Tricot 3, Sonja Unger 2, Kay Schuster 2, Lothar Wondraczek 1
1 Otto Schott Institute of Materials Research, Friedrich Schiller Universität, Fraunhoferstraße 6, 07743 Jena, Germany. 2Leibniz Institute of Photonic Technology, Friedrich Schiller Universität, Albert-Einstein-Straße 9, 0775 Jena, Germany. 3LASIR, UMR-CNRS 8516, Université de Lille 1, Villeneuve d’Ascq Cedex, France.

Binary 92.2 SiO2-7.8 P2O5 mol% glasses were prepared by Modified Chemical Vapor Deposition (MCVD). High purity quartz tubes (F300 Heraeus) served as substrate. High purity SiCl4- and POCl3-gases were used as raw materials. In the presented study, the structure of MCVD synthesized binary SiO2-P2O5 glasses up to 7.8 mol% P2O5 is characterized by 29Si and 31P MAS Nuclear Magnetic Resonance (NMR) and Raman spectroscopy. According to the literature, the range of ~650 up to 750 cm-1, ~980 up to 1045 cm-1 and, ~ 1115 up to 1180 cm-1 are known for phosphor groups to exhibit typical -P-O-P-, -Si-O- (P,Si) and -P-O- (P,Si) vibrations, respectively [1,2]. Nevertheless, NMR results have shown that there no direct bonding between P-O-P, which is contradictory with Raman result.

Fig. 1: Raman spectra of pure SiO2 and binary glass SiO2-P2O5.

Fig. 2: 31P NMR analysis. MAS-NMR spectrum and deconvolution (light blue dotted lines) and DQ-filtered acquisition obtained

[1] V. G. Plotnichenko et al., Journal of Non-Crystalline Solids 306 (2002).
[2] N. Shibata et al., Journal of Non-Crystalline Solids 45 (1981).