Study of the Structures and Physical Properties of Calcium Borophosphate Glass Containing Transition Metal Oxides

Abstract:

This research objected to study the effects of CeO₂, Sb₂O₃ and CoO on the structures and properties of calcium borophosphate glass (CBF) in ternary system 0.42CaO-0.06B₂O₃-0.52P₂O_5. The batches were melted at 1200 °C with 5 °C /min for 1 h in an electric furnace. The melts were regular bulk formed by pouring into a stainless mold and were immediately transferred to an annealing lehr at 550 °C for 2 h for testing the properties. The structures and physical properties were investigated. The results showed that all doped CBF glass were completely melted representing only one broad peak in XRD patterns. The structural observations revealed the major units are cross-linking B-O-P and B-O-B triangle and B-O-B tetrahedral units. The dense packing of structural or the shorter phosphate chain length and whether the branching group were achieved as the series CeO₂>Sb₂O₃>CoO. The density, refractive index, glossy, Abbe number increased slightly with increasing of transition oxide concentrations as the series CeO₂>Sb₂O₃>CoO. The microhardness also increased with increasing the concentration of transition oxides as the series CeO₂<Sb₂O₃<CoO due to CoO act as glass-network formers stronger than Sb₂O₃ and CeO₂

• Periodical: Key Engineering Materials (Volumes 675-676)
• Pages: 397-400
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.675-676.397
• Online since: January 2016
• Authors: Worapong Thiemsorn, Tida Tungyai*, Heiko Hessenkemper
• Keywords: Calcium Borophosphate, Glass, Physical Properties, Tetrahedral Site, Transition Oxide

References

[1] B. Tiwari, M. Pandey, V. Sudarsan and G.P. Kothiyal, Study of structural modification of sodium alumino-phosphate glasses with TiO2 addition through Raman and NMR spectroscopy, Physica B. 404 (2009) 47-51.

DOI: 10.1016/j.physb.2008.10.016

[2] Z. Pawlak, P.K.D.V. Yarlagadda, R. Forst and D. Hargreaves, The mechanical characteristics of phos- phate glasses under high temperature and friction-induced cross-linking processes, J. Achieve. Mater. Manufact. Engineering. 37: 2 (2009) 458-465.

[3] P.Y. Shih, Properties and FTIR spectra of lead phosphate glasses for nuclear waste immobilization, Mater. Chem. and Phys. 80 (2003) 299-304.

DOI: 10.1016/s0254-0584(02)00516-3

[4] M. Karabulut, E. Melnik, R. Stefan, G. K. Marasinghe, C. S. Ray, C. R. Kurkjain, D. E. Day, Mechanical and structural properties of phosphate glasses, J. Non-Cryst. Solids. 288 (2001) 8-17.

DOI: 10.1016/s0022-3093(01)00615-9

[5] K. A. A. Ali, A. J. E. D. Mostafa, Study of the structure and some physical properties of sodium-boro-phosphate glasses containing antimony and iron oxides, Turk J. Phys. 27 (2003) 225-233.