A Review of Recent Progress in the Study of the Thermal Treatment of Glass

JSGT 1931 V15 T262-T306

The following paper is a review of some phases of the technical literature and researches on glass since the papers of E. Zschimmer. Prof. Zschimmer discussed the published work on the physical properties of glass, and covered quite completely the subjects of devitrification, viscosity, annealing phenomena, density, mechanical properties, thermal expansion, optical constants, and electrical conductivity. The main purpose of this work of Zschimmer, as the title indicated, was to show the relationships existing between physical properties and the composition of the glass. Since this work covered the field so completely, and would need little modification on the basis of more recent work the present paper will review more particularly the question of temperature effects on the physical properties of glasses, and will not discuss at any length the question of composition. Thermal effects cannot be entirely separated from composition, inasmuch as many phenomena which have been observed and ascribed to temperature effects have been later found to be due to composition changes, and of course during devitrification there are localised composition changes resulting from the thermal treatment of the glass.

Link to JSGT 1928 T082 and T333

J. T. Littleton