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| Titel: |
Synthesis and Elastic Behaviour of Borate Glass Doped with High Tellurite Content |
| Auteur: |
H.A.A. Sidek M.K. Halimah M.N. Faizal W.Y.W. Daud A.W. Zaidan A.T. Zainal S.A. Halim |
| Verschenen in: |
Journal of applied sciences |
| Paginering: | Jaargang 6 (2006) nr. 2 pagina's 274-279 |
| Jaar: |
2006 |
| Inhoud: |
A systematic series of quality binary glass system of (x)TeO2)-(1-x)B2O3 with x = 60 to 80 (wt. %) were successfully synthesized by the rapid quenching method. The densities of each glass samples were determined using Archimedes method with acetone as a floatation medium. The molar volume have been estimated and analyzed for borate glasses doped with tellurite. Ultrasonics methods have been used to study the elastic properties of TeO2-B2O3 glasses where the sound wave velocities have been measured in each glass samples at a frequency of 15 MHz and at room temperature. The velocities, both longitudinal and transverse, increase linearly with increasing of TeO2 content in a borate glass network. Their elastic moduli such as longitudinal, Young`s, bulk and shear modulus have been calculated as a function of TeO2 concentration. Poisson`s ratio and Debye temperature were also found to increase nonlinearly with TeO2 concentration. The glass transition temperature were determined by the differential thermogravimetric analysis at heating rate of 20 K min-1. However the glass transition temperature (Tg) slowly decrease as more tellurite is added into the borate glass network. |
| Uitgever: |
Asian Network for Scientific Information, Pakistan (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 68 van 78 gevonden artikelen
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