Structure Studies of BaO-TiO2-SiO2 Glass-Ceramics Using 29Si MAS NMR and Raman Spectroscopy

Abstract The structural correlation between the BaO-TiO2-SiO2 (BTS) glass and the corresponding (BTS) glass-ceramic is examined by 29Si magic-angle spinning nuclear magnetic resonance (MAS NMR) analysis along with Raman spectroscopy and X-ray diffraction (XRD) measurements. From the deconvoluted spectrum of each Si unit, denoted by Qn, in both the BTS glasses and the BTS glass-ceramics, it is found that structural rearrangement of Si occurs from the Q2 and Q3 units to Ba2TiSi2O8 and the residual amorphous region, respectively. These results of 29Si MAS NMR analysis and Raman spectroscopy, together with XRD measurements, show that the local structure of the BTS mother glass reflects that of the corresponding crystals. This finding is expected to be valuable for tailoring the structure of functional glass-ceramics.