The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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The Effect of Temperature, Cooling and Surface Tension on the Fining in Alkali-Alkaline Earth-Silica Glassmelts Containing ZnO

  • Kim, Ki-Dong (Department of Materials Science & Engineering, Kunsan National University)
  • Published : 1998.09.01
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Abstract

The effects of temperature, cooling surface tension on the fining were studied in alkali-alkaline earth-silica TV screen glassmelts containing ZnO. Sodium antimonate $(Na_2OSb_2O_5)$ was used as a fining agent. Viscosity and surface tension of the melts were determined. On the basis of these properties, fining tests for several batches were performed by "MF" (Melting and Fining) and "PMF" (Profiled melting and Fining) methods. The results of these tests showed an opposite behavior each other with increase in ZnO content. This hehavior has been discussed in terms of two fining processes-growth of bubbles and shrinkage of seeds. shrinkage of seeds.

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