Raman scattering in silica glass in the permanent densification region

Raman spectra of silica glasses were measured at pressures up to about 20 GPa. The bandwidth of a broad band in the region 300–500 cm−1 reduced and approached D1 observed at 495 cm−1 with increasing pressure. The change was reversible with compression up to about 10 GPa. Above 10 GPa, the D2 line was enhanced and the change in the 300–500 cm−1 band became irreversible. The resultant spectrum, which was that of densified silica glass, had fundamentally the same structure as that of normal silica glass, although each band was different from that in normal glass in bandwidth, relative intensity, and peak position. D1 and D2, which were the mode associated with intercluster layer or cluster surface, were dominant in Raman scattering in high density silica glass.

[1]  J. Bates Raman Spectra of a and Cristobalite , 1972 .

[2]  J. C. Phillips Microscopic origin of anomalously narrow Raman lines in network glasses , 1984 .

[3]  R. W. Hendricks,et al.  Neutron irradiation effects and structure of noncrystalline SiO2 , 1974 .

[4]  Phillips Structural model of Raman "defect" bands of vitreous silica. , 1987, Physical review. B, Condensed matter.

[5]  Ken-ichi Kondo,et al.  Nonlinear pressure dependence of the elastic moduli of fused quartz up to 3 GPa , 1981 .

[6]  J. T. Krause,et al.  Raman scattering and far infra-red absorption in neutron compacted silica , 1970 .

[7]  B. Stoicheff,et al.  The low-temperature heat capacity and the Raman and Brillouin spectra of vitreous silica , 1959 .

[8]  Bell,et al.  Raman spectroscopy of SiO2 glass at high pressure. , 1986, Physical review letters.

[9]  Stanley Block,et al.  Calibration of the pressure dependence of the R1 ruby fluorescence line to 195 kbar , 1975 .

[10]  J. Mackenzie High-pressure Effects on Oxide Glasses: III, Densification in Nonrigid State , 1963 .

[11]  J. Burdett,et al.  Geometric constraints: a refined model for the structure of silica glass , 1990 .

[12]  R. A. Barrio,et al.  Vibrational decoupling of rings in amorphous solids , 1984 .

[13]  Phillips Jc Structural significance of Raman spectra of OH- and F-doped vitreous silica. , 1986 .

[14]  J. Scott,et al.  Longitudinal and Transverse Optical Lattice Vibrations in Quartz , 1967 .

[15]  Ching,et al.  Electronic- and vibrational-structure calculations in models of the compressed SiO2 glass system. , 1989, Physical review. B, Condensed matter.

[16]  M. Grimsditch,et al.  Polymorphism in amorphous SiO2 , 1984 .