Evaluation of processing methods for a calcia-yttria-alumina-silica glass-ceramic

Structure−Property Relationship of Permutite-like Amorphous Silicates, Nax+2yM3+xSi1-xO2+y (M3+ = Al, Mn, Fe, Y), for Ion-Exchange Reactions

“…The IR spectra of the Mn-, Fe-, and Y-permutites match those of the Al-permutite and are similar to published spectra of Mn-, Fe-, and Y-silicates. [30][31][32] The band assignments given for the Al-permutite can be extended to the other M 3+permutites synthesized in this study. Negligible differences between the spectra can be explained by the polarization and distortion of SiO 4 tetrahedra surrounding a heteroatom.…”

“…Negligible differences between the spectra can be explained by the polarization and distortion of SiO 4 tetrahedra surrounding a heteroatom. 32,33 Thus, the change in frequency is determined principally by the polarity and strength of the M δ+ ‚‚‚O δ-SiO 3 bonds. Again, no correlations could be made for peak position and the M 3+ concentration or between the quantification of OH groups and peak intensity.…”

The fabrication of one-dimensional Ca4Y6(SiO4)6O: Ln3+ (Ln = Eu, Tb) phosphors by electrospinning method and their luminescence properties

“…In Fig. 2c, for the Ca 4 Y 6 (SiO4) 6 O: Eu 3+ microfibers annealed at 1000°C, the strongest absorption peak at 945 cm À1 maybe attributed to the stretching vibration of the SiAOAY bond, the absorption peaks at 562 cm À1 and 516 cm À1 are ascribed to the stretching vibration of the YAO bond [23]. Meanwhile, the asymmetric deformation vibration of SiO 4 groups can be observed at 433 cm À1 [24].…”

Electrospinning synthesis and luminescent properties of one-dimensional Ca2Gd8(SiO4)6O2:Eu3+ microfibers and microbelts

“…In Fig. 2b, for the Ca 2 Gd 7.9 (SiO 4 ) 6 O 2 :0.1Eu 3þ microfibers annealed at 1000 C, the strongest absorption peak at 939 cm À1 is attributed to the stretching vibration of the SieOeGd bond, the absorption peaks at 554 cm À1 and 507 cm À1 are ascribed to the stretching vibration of the GdeO bond [40]. Meanwhile, the asymmetric deformation vibration of SiO 4 groups can be observed at 432 cm À1 [41].…”