Glass, Volume 1 |
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Page 74
The Ge - O - Ge stretching absorption lies near 878 cm - 1 in both the hexagonal
crystal and the glass forms , indicating that the Ge is 4 - coordinated . In the
tetragonal crystal in which Ge exhibits sixfold coordination , the stretching
frequency ...
The Ge - O - Ge stretching absorption lies near 878 cm - 1 in both the hexagonal
crystal and the glass forms , indicating that the Ge is 4 - coordinated . In the
tetragonal crystal in which Ge exhibits sixfold coordination , the stretching
frequency ...
Page 146
Figure 14 shows the polarizing microscopic picture of a sample which was heat
treated at 565°C for 8 hr after stretching , and ground and polished to leave a 1 -
mmthick platelet with faces parallel to the stretching axis . The spheroidal particle
...
Figure 14 shows the polarizing microscopic picture of a sample which was heat
treated at 565°C for 8 hr after stretching , and ground and polished to leave a 1 -
mmthick platelet with faces parallel to the stretching axis . The spheroidal particle
...
Page 148
The heat - treated glass was stretched from 50 to 500 times original length at the
viscosity of about 107 P . The elongation of silver particles by this stretching was
from 1 . 5 - to 3 - foldt as observed by electron micrographs , as shown in Fig .
The heat - treated glass was stretched from 50 to 500 times original length at the
viscosity of about 107 P . The elongation of silver particles by this stretching was
from 1 . 5 - to 3 - foldt as observed by electron micrographs , as shown in Fig .
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absorption alkali annealing applied assumed atoms band birefringence bleaching bond borate glasses Bray Brillouin calculations caused Ceram charge Chem coefficient color composition concentration conductivity considered constant containing coordination copper crystal crystalline curve darkening density dependence described detailed determined dielectric diffusion discussed distribution effect electron energy equation equilibrium et al experimental fading field fluctuations frequency function given gives heat treatment hole increased indicated intensity ions levels light liquid material measured mole negative observed obtained optical oxide oxygen particles phase photochromic Phys polarization positive present probably produce properties range ratio reduced relaxation reported respectively sample scattering separation shift shown in Fig silicate glasses silver halide similar SiO2 sodium Solids spectra spectrum strain stretching structural studied Taylor techniques temperature term thermal tion transition trapped units unpublished wavelengths York