## Glass, Volume 1 |

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Page 116

COORDINATES Since the charge carriers are executing a random walk in a

small particle , one expects their motion to be described by the diffusion

. However , it must be emphasized that the fading rate of a glass is determined in

...

COORDINATES Since the charge carriers are executing a random walk in a

small particle , one expects their motion to be described by the diffusion

**equation**. However , it must be emphasized that the fading rate of a glass is determined in

...

Page 307

From the continuity condition , for a constant D , OP OP De ô ( 52 ) ôt = Dəx2 - KT

O ( PE ) In this

neglected . The electric field is related to the charge distribution by Poisson ' s ...

From the continuity condition , for a constant D , OP OP De ô ( 52 ) ôt = Dəx2 - KT

O ( PE ) In this

**equation**, the generation and recombination of carriers have beenneglected . The electric field is related to the charge distribution by Poisson ' s ...

Page 321

Using this simplified diffusion conduction

boundary conditions , it is possible to obtain an expression for dielectric

relaxation . The result ( Doremus , 1973 ) shows a broad relaxation peak which is

related to dc ...

Using this simplified diffusion conduction

**equation**, under our appropriateboundary conditions , it is possible to obtain an expression for dielectric

relaxation . The result ( Doremus , 1973 ) shows a broad relaxation peak which is

related to dc ...

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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