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Surface properties of tellurite and fluorotellurite glasses

Published online by Cambridge University Press:  31 January 2011

M.D. O’Donnell ,
D. Furniss ,
V.K. Tikhomirov ,
D. Briggs ,
E.F. Smith  and
A.B. Seddon
M.D. O’Donnell*
Affiliation:
Novel Photonic Glasses Research Group, School of Mechanical, Manufacturing and Materials Engineering, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
D. Furniss
Affiliation:
Novel Photonic Glasses Research Group, School of Mechanical, Manufacturing and Materials Engineering, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
V.K. Tikhomirov
Affiliation:
Novel Photonic Glasses Research Group, School of Mechanical, Manufacturing and Materials Engineering, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
D. Briggs
Affiliation:
Wolfson Centre for Materials Research, School of Mechanical, Manufacturing and Materials Engineering, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom; and Centre for Surface Chemical Analysis, School of Chemistry, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
E.F. Smith
Affiliation:
Wolfson Centre for Materials Research, School of Mechanical, Manufacturing and Materials Engineering, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom; and Centre for Surface Chemical Analysis, School of Chemistry, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
A.B. Seddon
Affiliation:
Novel Photonic Glasses Research Group, School of Mechanical, Manufacturing and Materials Engineering, University Park, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
*
a)Address all correspondence to this author. Present address: Department of Materials, Imperial College London, South Kensington Campus, Exhibition Road, London, SW7 2AZ, United Kingdom. e-mail: m.odonnell@imperial.ac.uk
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Abstract

The surface properties of some freshly cleaved, or polished, quaternary tellurite glasses (TeO2-ZnO-Na2O-Yb2O3and TeO2-ZnO-Na2O-GeO2) and a proposed ternary fluorotellurite core/clad optical fiber pair (TeO2-N a2O-ZnF2) were investigated by means of x-ray photoelectron spectroscopy and chemical durability. Semiquantitative chemical analysis of the x-ray photoelectron spectroscopy spectra of cleaved tungsten-tellurite and fluorotellurite glasses showed good agreement with the batched at.% values when taking into account the effects of processing (e.g., melt fluorine volatilization), and the samples seemed to exhibit negligible hydrolysis. However, spectra of polished surfaces did not yield useful data because of masking of the glass “signal” from organic contamination at the sample surface. The chemical durability of these glasses were studied; specifically, the glass resistance to the attack and the etchability of various acids (aqueous HF, H2SO4, and HCl), alkali (aqueous NaOH), and water at 15, 21, and 60 °C were obtained by simple mass loss experiments and optical microscopy. Based on the appearance of the glass surfaces after immersion in these solutions, aqueous HF was found to be the most promising etchant, however, infrared spectra showed that significant OH was introduced into the glass. Attack of the fluorotellurite glasses was found to proceed at a higher rate in water at 60 °C compared with room temperature, and at both temperatures was shown to be diffusion controlled, with an Arrhenian activation energy estimated as 57 kJ mol−1.

Keywords

CeramicInfrared (IR) spectroscopyX-ray photoelectron spectroscopy (XPS)
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 6 , June 2007 , pp. 1673 - 1684
Copyright
Copyright © Materials Research Society2007

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