Glass, Volume 1Minoru Tomozawa, Robert H. Doremus |
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Page 204
... phonons do exist in the glasses but also some other excitations exist which mask the specific heat of the Debye phonons . The specific heat of glasses at low temperatures now takes the form 1 Cv C1T + ( C3 ' + CDebye ) T3 = ( 80 ) where ...
... phonons do exist in the glasses but also some other excitations exist which mask the specific heat of the Debye phonons . The specific heat of glasses at low temperatures now takes the form 1 Cv C1T + ( C3 ' + CDebye ) T3 = ( 80 ) where ...
Page 205
... phonon lifetimes in fused silica at temperatures down to 2.4 K. They conclude from their measurements that longitudinal phonons ( v ~ 33 GHz ) are well - defined ex- citations whose lifetimes increase as the temperature is lowered ...
... phonon lifetimes in fused silica at temperatures down to 2.4 K. They conclude from their measurements that longitudinal phonons ( v ~ 33 GHz ) are well - defined ex- citations whose lifetimes increase as the temperature is lowered ...
Page 212
... ( phonons ) is phenom- enologically described by the Pockels ' tensor ( Nye , 1957 ) which gives the intensity and polarization properties for Brillouin scattering . For a glass only two independent Pockels ' coefficients exist and they ...
... ( phonons ) is phenom- enologically described by the Pockels ' tensor ( Nye , 1957 ) which gives the intensity and polarization properties for Brillouin scattering . For a glass only two independent Pockels ' coefficients exist and they ...
Contents
Text | 8 |
Ultraviolet Absorption | 10 |
Visible Absorption | 35 |
Copyright | |
49 other sections not shown
Common terms and phrases
absorption alkali anisotropic annealing applications assumed atoms band birefringence bleaching bond Bray Brillouin calculations caused Ceram charge Chem coefficient color composition concentration considered constant containing coordination copper crystal crystalline curve darkening density dependence described detailed determined dielectric diffusion discussed distribution effect electron energy equilibrium et al experimental fading field Figure fluctuations frequency function given gives heat heat treatment hole increase indicated intensity ions levels light liquid material measured microstructural mole negative birefringence observed obtained optical oxide oxygen particles phase photochromic Phys polarization positive present produce range ratio reduced relaxation reported respectively sample scattering separation shift shown in Fig shows silicate glasses silver halide similar SiO2 sodium Solids spectra spectrum strain stress stretching structural studied Taylor techniques temperature term thermal tion transition trapped viscosity wavelengths York