Compositional effects on the optical and thermal properties of sodium borophosphate glasses

Dielectric dispersion and spectroscopic investigations on Na2SO4–B2O3–P2O5 glasses mixed with low concentrations of TiO2

“…B 2 O 3 is also a strong glass former, when it is mixed in the phosphate glasses, the tetrahedral boron entities dominate in the phosphate-rich domain where as trigonal boron entities prevail in the borate-rich side and form easily B O P bridges. The highest stability occurs for fully polymerized glasses and can be related to the energetics of the reaction B O B + P O P = 2(B O P); this relation also suggests that the B O P linkage is more stable relatively than the mixture of B O B and P O P linkages [30][31][32][33].…”

Thermodynamical miscibility in 0.8[xB2O3–(1−x)P2O5]–0.2K2O glasses

“…Negative mixing enthalpy suggests also spontaneous miscibilities in the solution. Some structural investigations of borophosphate glasses [27][28][29][30] have shown that tetrahedral boron entities are present in the phosphate-rich domain and trigonal boron entities are present in the borate-rich side. Tetrahedral boron dominates in the high phosphate compositions and hence forms easily B-O-P bridges that cross-link the phosphate chains.…”

Thermal lens study of PbO–Bi2O3–Ga2O3–BaO glasses doped with Yb3+

“…It can be seen that the PbO-Bi 2 O 3 -Ga 2 O 3 -BaO glasses present small ds/dT when compared to other glasses [10,[16][17][18][19][20]. This is interesting for athermal devices, where ds/dT = 0 [21], which are characterized by the absence of optical distortions originated from thermal expansion and variation of the refractive index with temperature. Moreover, the thermal conductivity and the thermal diffusivity of PbO-Bi 2 O 3 -Ga 2 O 3 -BaO glasses are comparable to LG750, a phosphate commercial glass [19,20] and also to Ga:La:S glasses [10].…”