Modern Aspects of the Vitreous State, Volume 1John Douglas Mackenzie |
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Page 55
... ratio , T / Tm , of their normal boiling to their normal melting temperature . This ratio is given in Table III . It is seen that the ratio is larger than 1.8 for all the B + compounds and is less than 1.6 for all the Do compounds . For ...
... ratio , T / Tm , of their normal boiling to their normal melting temperature . This ratio is given in Table III . It is seen that the ratio is larger than 1.8 for all the B + compounds and is less than 1.6 for all the Do compounds . For ...
Page 67
... ratio but a dynamic equilibrium is set up between the chains of different length producing a stable molecular weight distribution . As the M / P ratio approaches unity , the number average chain length approach- es infinity , i.e. wall ...
... ratio but a dynamic equilibrium is set up between the chains of different length producing a stable molecular weight distribution . As the M / P ratio approaches unity , the number average chain length approach- es infinity , i.e. wall ...
Page
... ratio AEvap / En varies between 3 and 4 , for liquid metals , it is 8-25 , and for fused salts , between 4 and 5 . For liquid BeF2 at 750 ° C , AEvap is 54 kcal / mole50 whilst E , is 65 kcal / mole . This anomolous AEvap / E ratio of ...
... ratio AEvap / En varies between 3 and 4 , for liquid metals , it is 8-25 , and for fused salts , between 4 and 5 . For liquid BeF2 at 750 ° C , AEvap is 54 kcal / mole50 whilst E , is 65 kcal / mole . This anomolous AEvap / E ratio of ...
Contents
CRYSTALLIZATION KINETICS AND GLASS FORMA | 38 |
CONSTITUTION OF PHOSPHATE GLASSES | 63 |
NUCLEAR MAGNETIC RESONANCE ABSORPTION | 92 |
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absorption acid alkali Amer amorphous anions approximately B₂O band binary bonds borates boron atoms boron oxide calculated cation cent metal oxide ceram chain length chem cm-¹ composition configurational coordination number corresponding coupling constant cristobalite crystalline decrease diffraction electron energy entropy equation equilibrium experimental fluidity free volume frequency function glass formation glass forming tendency glass structure glass temperature glass transition temperature groups heat hydrogen bonding increase infra-red ionic ions kcal/mole kinetic lattice liquid silicates Mc/s method mole per cent molecular weight molecules Na₂O nuclear magnetic resonance number average observed obtained oxygen partition function peaks phase phosphate glasses phosphorus Phys polymers quadrupole radial distribution curve Raman random network scattering segments shown in Figure silicate glasses SiO2 sodium solid spectra Structure of Glass studies supercooled T₂ tetrahedra theoretical theory thermodynamic undercooled units values variation vibrations viscosity vitreous vitreous silica Warren Wazer Zachariasen