Structural and surface properties of zinc-tellurite glass doped with silicon dioxide

This thesis studied the influence of silicon dioxide (SiO2) on the physical, thermal, structural and surface properties of zinc-tellurite glass. A series of transparent ternary tellurite glass systems with composition (80-x)TeO2–20ZnO–xSiO2, where x = 0 till 0.20 mol% were synthesized via convention...

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Main Author:	Azmi, Syarinie
Format:	Thesis
Language:	English
Published:	2018
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/81388/1/SyarinieAzmiMFS2018.pdf
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spelling	my-utm-ep.813882019-08-23T04:07:00Z Structural and surface properties of zinc-tellurite glass doped with silicon dioxide 2018 Azmi, Syarinie QC Physics This thesis studied the influence of silicon dioxide (SiO2) on the physical, thermal, structural and surface properties of zinc-tellurite glass. A series of transparent ternary tellurite glass systems with composition (80-x)TeO2–20ZnO–xSiO2, where x = 0 till 0.20 mol% were synthesized via conventional melt-quenching method. The effects of varying SiO2 contents on the glass density, structural characteristics, thermal properties, water contact angle (WCA), surface roughness and surface morphology were investigated. The amorphous nature of the glass was confirmed using X-ray diffraction measurement. The increase in the SiO2 contents reduced the density from 5.55 to 5.53 g.cm-3 and enhanced the molar volume from 25.96 to 26.06 cm3.mol-1. Differential thermal analysis revealed the increase of glass transition temperature (Tg) with the increase of SiO2 contents. The thermal stability factor was found to vary between 79.9 to 81.5°C depending on the glass composition. Glass morphologies were characterized using atomic force microscopy and WCA measurements. Glass surface roughness as much as 10 nm was attained which is higher than normal glass. The optimal value for WCA was discerned to be 101° and the minimum surface energy was found to be 0.06 N.m-1 for glass sample with 0.1 mol% of SiO2 indicating a glass with low wettability compared to other zinc-tellurite glass. The structural characteristics of glass samples were investigated using Fourier transform infrared (FTIR) spectroscopy in the range of 600 – 4000 cm-1. The FTIR results showed the tellurium atom coordination changes from TeO4 to TeO3 with the increase of SiO2 contents. For TeO4 coordination, the infrared band peaks occurred between 642.8 and 661.7 cm-1 whereas for TeO3, the peaks were observed between 784.7 and 773.1 cm-1. Field emission scanning electron microscopy and energy dispersive X-ray spectroscopy were performed on the glass sample. The surface morphology of glass system appeared rougher with the addition of SiO2 content up to 0.1 mol% which is better compared to normal glass. Overall, the physical, thermal and structural properties of the proposed zinc-tellurite glass system were marginally changed while the surface properties were significantly improved with the inclusion of SiO2. 2018 Thesis http://eprints.utm.my/id/eprint/81388/ http://eprints.utm.my/id/eprint/81388/1/SyarinieAzmiMFS2018.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:124766 phd doctoral Universiti Teknologi Malaysia Physics
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Azmi, Syarinie Structural and surface properties of zinc-tellurite glass doped with silicon dioxide
description	This thesis studied the influence of silicon dioxide (SiO2) on the physical, thermal, structural and surface properties of zinc-tellurite glass. A series of transparent ternary tellurite glass systems with composition (80-x)TeO2–20ZnO–xSiO2, where x = 0 till 0.20 mol% were synthesized via conventional melt-quenching method. The effects of varying SiO2 contents on the glass density, structural characteristics, thermal properties, water contact angle (WCA), surface roughness and surface morphology were investigated. The amorphous nature of the glass was confirmed using X-ray diffraction measurement. The increase in the SiO2 contents reduced the density from 5.55 to 5.53 g.cm-3 and enhanced the molar volume from 25.96 to 26.06 cm3.mol-1. Differential thermal analysis revealed the increase of glass transition temperature (Tg) with the increase of SiO2 contents. The thermal stability factor was found to vary between 79.9 to 81.5°C depending on the glass composition. Glass morphologies were characterized using atomic force microscopy and WCA measurements. Glass surface roughness as much as 10 nm was attained which is higher than normal glass. The optimal value for WCA was discerned to be 101° and the minimum surface energy was found to be 0.06 N.m-1 for glass sample with 0.1 mol% of SiO2 indicating a glass with low wettability compared to other zinc-tellurite glass. The structural characteristics of glass samples were investigated using Fourier transform infrared (FTIR) spectroscopy in the range of 600 – 4000 cm-1. The FTIR results showed the tellurium atom coordination changes from TeO4 to TeO3 with the increase of SiO2 contents. For TeO4 coordination, the infrared band peaks occurred between 642.8 and 661.7 cm-1 whereas for TeO3, the peaks were observed between 784.7 and 773.1 cm-1. Field emission scanning electron microscopy and energy dispersive X-ray spectroscopy were performed on the glass sample. The surface morphology of glass system appeared rougher with the addition of SiO2 content up to 0.1 mol% which is better compared to normal glass. Overall, the physical, thermal and structural properties of the proposed zinc-tellurite glass system were marginally changed while the surface properties were significantly improved with the inclusion of SiO2.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Azmi, Syarinie
author_facet	Azmi, Syarinie
author_sort	Azmi, Syarinie
title	Structural and surface properties of zinc-tellurite glass doped with silicon dioxide
title_short	Structural and surface properties of zinc-tellurite glass doped with silicon dioxide
title_full	Structural and surface properties of zinc-tellurite glass doped with silicon dioxide
title_fullStr	Structural and surface properties of zinc-tellurite glass doped with silicon dioxide
title_full_unstemmed	Structural and surface properties of zinc-tellurite glass doped with silicon dioxide
title_sort	structural and surface properties of zinc-tellurite glass doped with silicon dioxide
granting_institution	Universiti Teknologi Malaysia
granting_department	Physics
publishDate	2018
url	http://eprints.utm.my/id/eprint/81388/1/SyarinieAzmiMFS2018.pdf
_version_	1747818319701868544

Structural and surface properties of zinc-tellurite glass doped with silicon dioxide

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