Characterization of the glass-to-vitroceramic transition in yttrium aluminum borate laser glasses using solid state NMR

Recent progress in solid-state NMR of spin-½ low-γ nuclei applied to inorganic materials

“…107 For the aluminoborates Deters et al carried out two paired studies looking at the base glasses and then the effect of heat treatment to form glass-ceramics for the compositions (Y 2 O 3 ) x (Al 2 O 3 ) 0.4Àx (B 2 O 3 ) 0.6 (0.1 r x r 0.25) 102,103 and (Y 2 O 3 ) 0.2 (Al 2 O 3 ) x (B 2 O 3 ) 0.8Àx (0.15 r x r 0.4). 104,105 The work on these glasses built on work looking at crystalline solid solutions (e.g. (1 À x)RE 2 O 3 -xB 2 O 3 ) for similar applications where yttrium was used as a close analogue to RE of interest such as gadolinium.…”

“…10) and a model that has four (five with the unknown phase 'X') phases, with the equilibrium phases changing at around x = 0.3. 105 The concept of polyamorphism has been examined in Y 2 O 3 -Al 2 O 3 glasses through three glasses in the compositional range 24 to 41 mol% Y 2 O 3 using 27 Al and 89 Y MAS NMR in combination with microscopy and calorimetry. 106 Polyamorphism is an interesting concept where there is a density driven 'glass-inglass' phase separation.…”

“…As for several of the crystalline phases discussed yttrium-based glasses are also of significant technological interest, acting as RE hosts for example in lasing and scintillation applications. 89 Y NMR data from such glasses has been reported for aluminoborates, [102][103][104][105] aluminates 106 and aluminosilicates. 107 For the aluminoborates Deters et al carried out two paired studies looking at the base glasses and then the effect of heat treatment to form glass-ceramics for the compositions (Y 2 O 3 ) x (Al 2 O 3 ) 0.4Àx (B 2 O 3 ) 0.6 (0.1 r x r 0.25) 102,103 and (Y 2 O 3 ) 0.2 (Al 2 O 3 ) x (B 2 O 3 ) 0.8Àx (0.15 r x r 0.4).…”

“…10) and a model that has four (five with the unknown phase ‘X’) phases, with the equilibrium phases changing at around x = 0.3. 105…”

Nanoscopic yttrium oxide fluorides: non-aqueous fluorolytic sol–gel synthesis and structural insights by19F and89Y MAS NMR

“…for IR-and UV transparent glasses or laser glasses. 5 Yttrium barium copper oxide YBa 2 Cu 3 O 7−x ("YBCO"), discovered in 1987 and meanwhile well-known for its high-temperature superconductivity, is prepared from Y 2 O 3 . 6 Moreover, Y 2 O 3 is the basic material for the production of melts allowing the extraction of doped or undoped laser crystals like Y 3 Al 5 O 12 (YAG, yttrium-aluminium garnet), [7][8][9] or crystals like Y 3 Fe 2 (FeO 4 ) 3 (YIG, yttrium-iron garnets), used as microwave filters.…”