By Charles H. Drummond III
This publication is a state of the art selection of contemporary papers on glass difficulties as provided on the 68th convention on Glass difficulties on the Ohio nation collage. subject matters contain production, glass melters, combustion, refractories, and new advancements.
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Guideline*: jK For sub-surface temperatures, use 1 or Γ* microns Fur surface temperatures. 9 microns For low temperature*. Si 5 0 A Wavelength (microns) Fig. 4 IR Measurement of Glass One difficulty associated with the temperature measurement of glass is the fact that glass is an excellent thermal insulator. As a result of this property, thermal stratification happens quite profoundly and rapidly in glass cooling and heating processes. As a result one needs to consider the type of glass being measured, it's thickness and the process to achieve good results.
25" might emit only 10%. 5" in to the glass. The simplistic approach is not too far wrong, and in reality the true measurement of partially transparent glass ends up as an integral equation of energy contributions up to a terminal depth within the glass. This terminal depth is sometimes referred to as the effective depth. Tn the case of clear soda glass measured with a 1 um instrument, the effective depth is typically ~25mm. Guideline*: jK For sub-surface temperatures, use 1 or Γ* microns Fur surface temperatures.
An interesting aspect is the observation, that the Al release is strongly reduced even with a great Al enrichment in the surface which opens up interesting discussion about the possible processes which happens with this surface changes. 47 Industrial Experiences with a New Surface Treatment Technology Another important aspect coming from laboratory tests has been the fact that this surface improvement technique works for all kind off glass compositions: Soda lime glass, lead crystal glass, borosilicate glass and even with different enamel compositions.
68th Conference on Glass Problems by Charles H. Drummond III