Structure–property relationships of Fe2O3 doped novel oxyfluorophosphate glasses

Silicon core–iron siloxane shell nanoparticle polymer composites with multiferroic properties

“…An increase of the intensity of absorption bands in the region 1150–1000 cm −1 was associated with the increasing content of nanoparticles from 5 to 40% in the PS matrix. The shift of the absorption band of the asymmetric valence vibrations of SiOSi bonds from 1080 to 1047 cm −1 was caused by the appearance of a band at about 1045 cm −1 ; this was related to the vibrations of SiOFe bonds formed by the interactions of silica silanol groups with TMDESI or at a later stage during the hydrolysis of ethoxysilyl groups in the process of composite preparation . Thus, we concluded that TMDESI was covalently bound to the silica core of the nanoparticles.…”

The effect of mixed La-Y doping on water resistance of phosphate glass

“…The vibrational band centered at 720−730 cm -1 is due to symmetric stretching vibrations of P−O−P in the Q 2 tetrahedron [47,48]. The band appeared at 777−783 cm -1 is assigned to symmetric stretching vibrations of the bridging oxygen of P−O−P linkages of (PO 3 ) 2groups in Q 1 structural units [49,50]. The band at 882−896 cm -1 is assigned to asymmetric stretching vibrations of P−O−P in Q 2 units linked with linear metaphosphate chain [45][46][47].…”

“…The peak around 925−933 cm -1 can be considered as asymmetric stretching vibrations of P-O-P in Q 2 units linked with large metaphosphate rings [46][47][48]. The band around 1001−1013 cm -1 is ascribed to symmetric stretching vibrations of P−Obonds of (PO 4 ) 3− groups in Q 0 units [45,49,50]. The assignment of the band between 1091 and 1113 cm -1 is associated to asymmetric stretching mode of chain-terminating Q 1 groups [45,51].…”

“…The band at 1174−1191 cm -1 is related to symmetric stretching vibrations of non-bridging oxygens of O−P−O linkages of (PO 2 ) − groups in Q 2 units [45,49]. The wavenumber of the band at 1248−1257 cm -1 is ascribed to asymmetric stretching vibrations of non-bridging oxygens of O−P−O linkages of (PO 2 ) − groups in Q 2 units [49,50]. The band at 1300−1329 cm -1 is attributed to P=O asymmetric stretching mode of the phosphate tetrahedra [52].…”

“…The bands at 1372−1411 cm -1 is attributed to P=O stretching mode of the phosphate tetrahedra [52]. [49,50] 1300−1329 P=O asymmetric stretching mode of the phosphate tetrahedra [52] 1372−1411 P=O stretching mode of the phosphate tetrahedra [52] Deconvolution parameters of FT-IR spectra for studied glasses are listed in Table 3. The Q (2) is used to quantify the changes of relative contents of Q 2 and Q 1 units, which represents the content of Q 2 structural units as a percentage of the total contents of Q 1 and Q 2 in glass.…”