Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad
Three glass systems with composition xNa₂O- (35-x)V₂O₅-65TeO₂;(x=5,10, 15, 20, 25 mol %), yWO₃-(40-y)Ag₂O-60TeO₂ (y=0, 10, 20, 30 mol %) and zNb₂O₅-(20-z)BaO-80TeO₂ (z=0, 5, 10, 15 mol %) were prepared by conventional solid state and melt-quenching methods. Elastic moduli and structural changes were...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://ir.uitm.edu.my/id/eprint/21621/1/TP_MUHAMMAD%20UMAIR%20MOHAMAD%20AS%2015_5.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my-uitm-ir.21621 |
|---|---|
| record_format |
uketd_dc |
| spelling |
my-uitm-ir.216212018-09-26T03:29:13Z Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad 2015 Mohamad, Muhammad Umair QA Mathematics Elementary mathematics. Arithmetic QC Physics Three glass systems with composition xNa₂O- (35-x)V₂O₅-65TeO₂;(x=5,10, 15, 20, 25 mol %), yWO₃-(40-y)Ag₂O-60TeO₂ (y=0, 10, 20, 30 mol %) and zNb₂O₅-(20-z)BaO-80TeO₂ (z=0, 5, 10, 15 mol %) were prepared by conventional solid state and melt-quenching methods. Elastic moduli and structural changes were studied by measuring ultrasonic shear and longitudinal velocities using the pulse-echo-overlap technique and Raman spectroscopy, respectively. For xNa₂O-(35-x)V₂O₅-65TeO₂ glass system, both longitudinal (vL) and shear (vs) velocities showed small steady decrease with addition of Na₂O from x=5 mol % to x=15 mol % followed by large decrease at x>15 mol %. Longitudinal modulus (CL), shear modulus (μ), Young’s modulus (Y), Hardness (H) and Debye Temperature (θD) also showed similar behavior to the ultrasonic velocities. The decrease in elastic moduli is suggested to be due to weakening of network rigidity of the glass system with increase in formation of non-bridging oxygen (NBO) as revealed by Raman spectroscopy... 2015 Thesis https://ir.uitm.edu.my/id/eprint/21621/ https://ir.uitm.edu.my/id/eprint/21621/1/TP_MUHAMMAD%20UMAIR%20MOHAMAD%20AS%2015_5.pdf text en public phd doctoral Universiti Teknologi MARA Faculty of Applied Sciences |
| institution |
Universiti Teknologi MARA |
| collection |
UiTM Institutional Repository |
| language |
English |
| topic |
QA Mathematics QA Mathematics QC Physics |
| spellingShingle |
QA Mathematics QA Mathematics QC Physics Mohamad, Muhammad Umair Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad |
| description |
Three glass systems with composition xNa₂O- (35-x)V₂O₅-65TeO₂;(x=5,10, 15, 20, 25 mol %), yWO₃-(40-y)Ag₂O-60TeO₂ (y=0, 10, 20, 30 mol %) and zNb₂O₅-(20-z)BaO-80TeO₂ (z=0, 5, 10, 15 mol %) were prepared by conventional solid state and melt-quenching methods. Elastic moduli and structural changes were studied by measuring ultrasonic shear and longitudinal velocities using the pulse-echo-overlap technique and Raman spectroscopy, respectively. For xNa₂O-(35-x)V₂O₅-65TeO₂ glass system, both longitudinal (vL) and shear (vs) velocities showed small steady decrease with addition of Na₂O from x=5 mol % to x=15 mol % followed by large decrease at x>15 mol %. Longitudinal modulus (CL), shear modulus (μ), Young’s modulus (Y), Hardness (H) and Debye Temperature (θD) also showed similar behavior to the ultrasonic velocities. The decrease in elastic moduli is suggested to be due to weakening of network rigidity of the glass system with increase in formation of non-bridging oxygen (NBO) as revealed by Raman spectroscopy... |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Mohamad, Muhammad Umair |
| author_facet |
Mohamad, Muhammad Umair |
| author_sort |
Mohamad, Muhammad Umair |
| title |
Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad |
| title_short |
Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad |
| title_full |
Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad |
| title_fullStr |
Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad |
| title_full_unstemmed |
Elastic, structural and optical studies on ᵪNa₂O-(35-ᵪ)V₂O₅-65TeO₂,ƴWO₃-(40-y)Ag₂O-60TeO₂ AND zNb₂O₅-(20-z)BaO-80TeO₂ tellurite based glass systems / Muhammad Umair Mohamad |
| title_sort |
elastic, structural and optical studies on ᵪna₂o-(35-ᵪ)v₂o₅-65teo₂,ƴwo₃-(40-y)ag₂o-60teo₂ and znb₂o₅-(20-z)bao-80teo₂ tellurite based glass systems / muhammad umair mohamad |
| granting_institution |
Universiti Teknologi MARA |
| granting_department |
Faculty of Applied Sciences |
| publishDate |
2015 |
| url |
https://ir.uitm.edu.my/id/eprint/21621/1/TP_MUHAMMAD%20UMAIR%20MOHAMAD%20AS%2015_5.pdf |
| _version_ |
1783733759536791552 |