The Glassmelting Process: II, Glass Structure and the Effects of 'Melting History' on Glass Properties

Interpretations are made of experimental and practical aspects of glass structures in terms of a postulated distribution of anionic structures in glass. The existence of effects determined by the “melting history” of a glass is demonstrated by specially programmed experiments on viscosity and tensile strength. The viscosity curve of glass melted at a relatively low temperature lies above that for the same glass which had been previously melted at high temperatures. The two curves merge in the high-temperature region. It also is found that the tensile strength of glass fibers increases as the maximum melting temperature increases.