Transcription of Ceramic Transactions, Volume 141, p 379-386 - …
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Ceramic Transactions, Volume 141, p 379-386 - …
VISCOSITY OF COMMERCIAL GLASSES IN THE SOFTENING RANGEA lexander Fluegel, Arun K. Varshneya, Thomas P. Seward, and David A. EarlNew York State College of CeramicsAlfred University2 Pine StreetAlfred, NY 14802 ABSTRACTThe medium range viscosity (log viscosity / Pa s = 6 to 9) is of vital interest forforming and annealing in the glass is essential for the design of meltingand annealing furnaces, as well as for the forming processes. In this work we deter-mined the viscosity of 150 glass composition variations centered on the float,container, low-expansion borosilicate, TV panel, wool, and textile fiber glasses byparallel-plate viscometry. The composition-viscosity relationship was calculatedthrough multiple study was part of a larger project of the NSF Industry/University Center forGlass Research (CGR) [1] to give the glass industry a database and a method forcalculating the properties of technical glass melts within the composition andtemperature limits of interest. As part of it, the viscosities of 150 industrial glassvariations (including float, container, low-expansion borosilicate, TV panel, wool,and textile fiber glasses) have been determined between log (u/Pa s) = 1-12 byvarious groups.
EXPERIMENTAL DESIGN AND PROCEDURE Experimental design Member companies of the NSF Industry/University Center for Glass Research (CGR) selected six groups of industrial glasses for the study: float, container, low-
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