Abstract:In this work glass rods of (Mg x Ca 1-x ) 3 Al 2 Si 3 O 12 (x = 0, 0.5 and 1) doped with 1 wt% Nd 2 O 3 were produced by the laser floating zone technique. Thermo-mechanical and spectroscopic properties have been evaluated. The three glass samples present good thermo-mechanical properties, with similar hardness, toughness and glass transition temperatures. The spectroscopic characterization shows spectral shifts in absorption and emission spectra. These spectral shifts together with JuddOfelt intensity parameters and ionic packing ratio have been used to investigate the local structure surrounding the Nd 3+ ions and the covalency of the Nd-O bond. All obtained results agree and confirm the higher covalency of the Nd-O bond in the Ca 3 Al 2 Si 3 O 12 glass. Kozankova, "Er-and Nd-doped yttrium aluminosilicate glasses: preparation and characterization," Opt. Mater. 33(12), 1872-1878 (2011 42(1-3), 189-196 (1980). -78-XX-95, 1978). 36. T. Izumitani, H. Toratani, and H. Kuroda, "Radiative and nonradiative properties of Neodymium doped silicate and phosphate glasses," J. Non-Cryst. Solids 47(1), 87-99 (1982). 37. W. F. Krupke, "Induced-emission cross sections in Neodymium laser glasses," IEEE J. Quantum Electron. QE-10(4), 450-457 (1974). 38. M. J. Weber, D. C. Ziegler, and C. A. Angell, "Tailoring stimulated emission cross sections of Nd 3+ laser glass: observation of large cross sections for BiCl 3 glasses," J. Appl. Phys. 53(6), 4344-4350 (1982 66-78 (1998). 43. R. D. Shannon, "Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides," Acta Crystallogr. A 32(5), 751-767 (1976). 44. L. A. Riesberg and M. J. Weber, "Relaxation phenomena in rare-earth luminescence," Prog. Optics 14, 89-159 (1975 5799-5811 (1978).
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