Glass, Volume 22 |
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Page 103
The square - root - of - time dependence suggests a diffusion model for the
hydration reaction . However , the diffusion process must be complex because of
( 1 ) the step profile and ( 2 ) the initial time dependence of the water content ,
which is ...
The square - root - of - time dependence suggests a diffusion model for the
hydration reaction . However , the diffusion process must be complex because of
( 1 ) the step profile and ( 2 ) the initial time dependence of the water content ,
which is ...
Page 223
agree with the time dependence of static fatigue data on glass . ... the rate
constant k of a chemical reaction is k = ko exp ( - AG * / RT ) ( 56 ) where AG * is
the free energy of activation and ko is weakly dependent on temperature or
pressure .
agree with the time dependence of static fatigue data on glass . ... the rate
constant k of a chemical reaction is k = ko exp ( - AG * / RT ) ( 56 ) where AG * is
the free energy of activation and ko is weakly dependent on temperature or
pressure .
Page 224
Gilman and Tong ( 1971 ) derived an equation for the velocity of crack motion
with the same dependence on stress as Eq . ( 48 ) from a quantum tunneling
model of fracture . Their model does not explicitly include a chemical reaction ,
but ...
Gilman and Tong ( 1971 ) derived an equation for the velocity of crack motion
with the same dependence on stress as Eq . ( 48 ) from a quantum tunneling
model of fracture . Their model does not explicitly include a chemical reaction ,
but ...
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Contents
Water in Glass | 75 |
Applications | 121 |
Gel Method for Making Glass | 129 |
Copyright | |
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acid addition adsorption alkali alkoxide analysis applied atoms band Bartholomew bond bulk calculated cause Ceram Chem chemical clusters coefficient components composition concentration constant contraction crack crystals curve decrease dependence depth determination developed discussed distribution Doremus effect energy equation et al example expansion experimental failure fatigue fibers formation formed fracture function geometry give given glass surfaces groups heating higher hydrated hydrolysis hydrosilicate important increase influence ions Kamiya layer lead length load lower material mean measured melting metal method mole observed obtained occurs oxide phase Phys possible prepared pressure processes produced propagation properties range ratio reaction region samples seal shown in Fig shows silicate glasses SiO2 soda-lime Solids solution strain strength stress structure studies Table technique temperature thermal tion values vapor viscosity water content