Study of the structures and physical properties of calcium borophosphate glass containing transition metal oxides

Abstract

© 2016 Trans Tech Publications, Switzerland. This research objected to study the effects of CeO2, Sb2O3and CoO on the structures and properties of calcium borophosphate glass (CBF) in ternary system 0.42CaO-0.06B2O3-0.52P2O5. 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>Sb2O3CoO. The density, refractive index, glossy, Abbe number increased slightly with increasing of transition oxide concentrations as the series CeO2>Sb2O3CoO. 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 Sb2O3and CeO2.