Raman spectroscopy quantifying the composition of stuffed β-quartz derivative phases in lithium aluminosilicate glass-ceramics

Transparent glass–ceramics with (Eu3+,Yb3+):YNbO4 nanocrystals: Crystallization, structure, optical spectroscopy and cooperative upconversion

“…After raising the heat-treatment temperature to 800 °C, the glass matrix crystallizes in the form of β-quartz ss (the corresponding Raman bands appear at 110 cm -1 (not shown here) 480 and 1085 cm -1 [69,70]. The Raman spectrum gives the evidence of crystallization of tetragonal ReNbO 4 crystals (the bands at 340, 658 cm -1 , 805 см -1 and ~120 and ~200 cm -1 (external modes) [82,83]) and of the absence of T'-phase (the disappearance of the broad band at about 300 cm -1 ).…”

“…The glass with the composition of 18 Li 2 O, 27 Al 2 O 3 and 55 SiO 2 (mol%) [69,70] Batch to produce 300 g of glass was melted in a crucible made of quartz ceramics in a laboratory electric furnace at 1580 °C for 4 h with stirring, then the glass melt was bubbled by oxygen for 0.5 h to remove the hydroxyl groups from the melt. The melt was poured onto a metal plate and the initial glass was annealed at 620 °C.…”

Structural characteristics and spectral properties of novel transparent lithium aluminosilicate glass-ceramics containing (Er,Yb)NbO4 nanocrystals

“…6). The bands 110, 482 and 1080 cm -1 reveal crystallization of the ȕ-quartz ss with ȕ-eucryptite structure [30]. At higher heat treatment temperature of 900 °C the total crystallinity of glass-ceramics grows (the enhancement of Raman bands of ȕ-quartz solid solution and of tetragonal ytterbium niobate crystals).…”

“…The glass with the composition of 18 Li 2 O, 27 Al 2 O 3 and 55 SiO 2 (mol%) [30] was chosen for the study. It was doped with 2-5 mol% RE 2 O 3 (where RE is Y, Er, Yb) and 2-5 mol%…”

Spectroscopy and structural state of V4+ ions in lithium aluminosilicate glass and glass–ceramics

“…Dymshits and Zhinlin et al have carried out a series of studies about LAS glass system containing Co 2+ , Ni 2+ , and Nd 2+ in recent 30 years [2][3][4]11,12]. Moreover, they have successfully used the Raman spectroscopy to investigate the phase decomposition process and quantitatively analyze beta-quartz derivative phase in LAS glass-ceramics [19][20][21][22].…”