Soda-silica glass

Sodamide Soda-silica glass Soda-sinter process Sodatol... 

Warren, B.E. and Biscoe, J. (1938). Fourier analysis of X-ray patterns of soda-silica glass. Journal of the American Ceramic Society 21 259-265. 

Figure 10. Mechanisms of glass corrosion for a soda-silica glass. Conditions a, t = 0, pH = 7 b (stage 1), t > 0, pH < 9, selective Na dissolution and c (stage 2), t 0, pH 9 total dissolution. (Reproduced, with permission, from Ref. 1. Copyright 1979, Books for Industry.)...

Figure 13. Compositional profiles for a soda-silica glass leached in water for 15 min at-25°C in deionized water, SA/V — 10 m 1. Obtained with ESCA. (Reproduced, with permission, from Ref. 20. Copyright 1980, PNL Report 3465.)...

Figure 1 Spectral absorption of Fe + in soda-silica glass.

Preliminary temperature-dependence data on thulium-doped soda-silica glasses have shown the feasibility of determining at least some of the crystalline electric field parameters in unknown environments [175]. 

Rosenthal, A. B. and Garofalini S. H. (1987) Structural Role of Zinc Oxide in Silica and Soda-Silica Glasses, J. Am. Ceram. Soc., 70, 821-826. 

FIGURE 2.28 Effect of increasing the amount of NajO in a soda-silica glass on volume resistivity. ... 

Platinum is a beautiful silvery-white metal, when pure, and is malleable and ductile. It has a coefficient of expansion almost equal to that of soda-lime-silica glass, and is therefore used to make sealed electrodes in glass systems. The metal does not oxidize in air at any temperature, but is corroded by halogens, cyanides, sulfur, and caustic alkalis. 

The viscosity of liquid silicates such as drose containing barium oxide and silica show a rapid fall between pure silica and 20 mole per cent of metal oxide of nearly an order of magnitude at 2000 K, followed by a slower decrease as more metal oxide is added. The viscosity then decreases by a factor of two between 20 and 40 mole per cent. The activation energy for viscous flow decreases from 560 kJ in pure silica to 160-180kJmol as the network is broken up by metal oxide addition. The introduction of CaFa into a silicate melt reduces the viscosity markedly, typically by about a factor of drree. There is a rapid increase in the thermal expansivity coefficient as the network is dispersed, from practically zero in solid silica to around 40 cm moP in a typical soda-lime glass. 

For the soda-Hme-silica glasses this is about 2-5 gm/cm for the borosilicate glasses it is very nearly 2-25 gm/cm and hardly changes with slight variations in composition. Wembley L.l. lead glass has a density of 3-08. A very dense lead glass has a density of 5-2. 

For the hard borosilicate glasses and the soda-lime-silica glasses this if around 0-0025 cal °C" cm sec. For vitreous silica (Vitreosil) in the transparent form it is 0-0025 up to 500°C, and 0-0035 from 500 to 1000°C for the translucent form it is 0-0033. 

I il a soda-lime-silica glass, containing magnesia and boric oxide 1 than 1 per cent), made by the General Electric Co. It is often ibed as GEC X.8. or simply as X.8. The linear coefficient of Jial expansion between 20 and 350°C is 9-65 0-10 x 10-. This I il available as tubing and rod in a wide range of sizes. 

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