Download PDF by : Advances in Fusion and Processing of Glass III, Volume 141

ISBN-10: 1118405943

ISBN-13: 9781118405949

ISBN-10: 1574981560

ISBN-13: 9781574981568

Glass is still a fabric of serious medical and technological curiosity; notwithstanding, the industrial pressures at the glass undefined, the emphasis on international markets, and the global realization to power and environmental conservation proceed to extend. Forty-seven papers provide new strategies to the demanding situations of glass production, relatively as they pertain to melting and forming.Content:

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Extra info for Advances in Fusion and Processing of Glass III, Volume 141

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Ben 26 (1953), 202-214. 4 C. Kröger, W. Janetzko and G. Kreitlow, Glastech. Ber. 31 (1958), 221-228. E. Schwiete and G. Ziegler, Glastech. Ber. 28 (1955), 137-146. 6 J. E. Sharp, J. Am. Ceram. Soc. 41 (1958), 461-463. D. l. Primenko, Soc. J. Glass Phys. Chem. 11 (1985), 206-211. 8 C. Madivate, F. Müller and W. Wilsmann, Glastech. Ber. 69 (1996), 167178. 9 R. Conradt, Glastech. Ber. 63K (1990), 134-143. 10 R. Conradt, Z. Metallkunde 92 (2001), 1158-1162. n M . Lindig, in: HVG-Fortbildungskurs: „Wärmetransportprozesse bei der Herstellung und Formgebung von Glas", The German Society of Glass Technology, Offenbach 2002.

For a gas species with a high solubility and diffusion in the melt, the transfer from the bubbles to the melt can be very efficient. Especially for bubbles of a diameter of 1-3 cm, it is possible to almost saturate the melt (about 70-80 % of saturation) by intense bubbling. About 100 bubbles per kg melt are required to achieve this saturation level. A gas species which fulfils the requirement of high solubility and diffusion in a silicate melt is helium. Although during the helium bubbling process about 25 % of the dissolved CO2 will be stripped and about 50 % of the nitrogen, the other gas concentrations are not very much affected.

C. Beerkens: "Chemical equilibrium reactions as driving forces for growth of gas bubbles during fining," 2nd International Conference on Fusion and Processing of Glass, Düsseldorf (1990). Glastech. Ber. Sonderband 63K (1990), pp. 222-242 12 F. Krämer: "Mathematisches Modell der Veränderung von Glasblasen in Glasschmelzen," Glastech. , 52 (1979) nr. 2, pp. 43-50 13 L. Némec: "The behaviour of bubbles in glass melts. Part 2. , 21 (1980) nr. 3. pp. 139-144 14 M. Mühlbauer and L. Némec: "Einfluß der Gase einer Glasschmelze auf das Verhalten von Gasblasen unter isothermer Bedingungen," Glastech.

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Advances in Fusion and Processing of Glass III, Volume 141

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