1. Viscosity/temperature data is compiled using factors given by Lakatos T., Johanssen L., Simmingsköld B., Viscosity-Temperature Relations in glasses composed of SiO₂-Al2O₃-Na₂O-K₂O-BaO-PbO-B₂O₃-CaO-ZnO-Li₂O in the Compositional Range of “Crystalline” Glasses. Glasteknisk Tidskrift. 34 (3) 1979. 61-65
    
2. We rely on the trident seal test for all compatibility or thermal mismatch tests. It is far more accurate than thread tests or dilatometers. See Hagy H.E., The Trident Seal- A Rapid and Accurate Expansion Differential Test. J. Am. Ceram. Soc. 62 (1972) 60-62
    
3. As tested by Integrex Testing- a laboratory division of Owens
   Corning Inc. Tests performed on freshly melted glass fined after the last load for six hours at 1310^oC (2390^oF) in a free standing pot.
    
4. We advise active air flushing around the interface between the power input and the elements or electrode connections.
   

• Gaffer Batch
• Energy Costs
• Working Properties
• Compatibility
• Physical Properties
• Durability
• Impact on Refractories and the Environment
• Foot Notes