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Vitreous Germania

6 STRUCTURAL MODELS FOR GERMANATE GLASSES 6.1 Vitreous Germania [Pg.100]

Although vitreous germania has a structure very similar to that of vitreous silica, its thermal expansion coefficient is approximately an order of magnitude larger. Gas diffusion studies indicate that the free volume of the vitreous germania structure is much smaller than that of the vitreous silica structure. Apparently this difference in free volume restricts the bond bending process which causes the low thermal expansion of vitreous silica. [Pg.156]

Fig. 11.11 Oxygen and Si/Ge standard deviations computed from 15 PBADs in vitreous germania and silica (see labeUing in Fig. 11.10)... Fig. 11.11 Oxygen and Si/Ge standard deviations computed from 15 PBADs in vitreous germania and silica (see labeUing in Fig. 11.10)...
Figure 10 Time-of-flight spectra for (A) vanadium, (B) polycrystalline silicon and (C) vitreous germania. Also shown are the normalized spectra for (D) polycrystalline silicon and (E) vitreous germania. Figure 10 Time-of-flight spectra for (A) vanadium, (B) polycrystalline silicon and (C) vitreous germania. Also shown are the normalized spectra for (D) polycrystalline silicon and (E) vitreous germania.
See other pages where Vitreous Germania is mentioned: [Pg.100]    [Pg.102]    [Pg.110]    [Pg.208]    [Pg.224]    [Pg.149]    [Pg.100]    [Pg.102]    [Pg.110]    [Pg.208]    [Pg.224]    [Pg.149]    [Pg.68]    [Pg.366]    [Pg.127]    [Pg.164]   


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