STRUCTURAL STUDY OF SOME LITHIUM BOROPHOSPHATE GLASSES USING DENSITY, HARDNESS AND INFRARED SPECTROSCOPY | ||||
| Al-Azhar Bulletin of Science | ||||
| Article 1, Volume 27, Issue 2-B, December 2016, Page 1-9 PDF (575.46 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/absb.2016.43970 | ||||
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| Authors | ||||
| A. M. Nassar* ; E. Nabhan; Al-Sh. Ramadan | ||||
| Phys. Dept. Faculty of Science (Girls branch) Al Azhar university, Nasr city, Cairo, Egypt. | ||||
| Abstract | ||||
| Glasses in the system [50Li 2 O-xB 2 O 3 -(50-x)P 2 O 5 ] (10 < x < 27.5), have been prepared by the melt quenching technique. Density, molar volume, hardness and Ft-IR spectroscopy have been employed to study the role of B 2 O 3 on the structure of the glass network. The results of density and hardness showed that both increased as P 2 O 5 is replaced by B 2 O 5 [as y was increased from 0.2 up to 0.4 where (y = B 2 O 3 /(B 2 O 3 +P 2 O 5 ))]. After Y 0.4 both of them decreased. Infrared spectra reveal that with the replacement P-O-B bonds are present at very low B 2 O 3 content and their relative amount increased within the whole range of B 2 O 3 . BO 4 tetrahedral groups are predominant (~ 100%) up to 15 mole% B 2 O 3 . Then, the proportion of BO 3 units starts to appear. | ||||
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