Etude théorique comparativé du comportement thermomécanique du verre borosilicaté et silico-sodo-calcique

Abstract

Borosilicate glass is highly resistant to thermal shock, due to its low coefficient of expansion. It exhibits good chemical durability. It has an “anomalous” behavior from a structural and mechanical point of view. It exhibits an expansion "anomaly" at 200 ° C. This work aims to make a bibliographic study on borosilicate glass concerning these anomalies. Carry out comparative theoretical research with respect to silico-soda-lime glass from the point of view of behavior to erosion by sandblasting, reinforcement by chemical tempering, and finally the behavior to thermal shock. Literature research on the structure and properties of borosilicate glass has shown that its structure exhibits an anomaly of change in coordination of boron atoms which goes from 3 to 4 Our literature search also revealed that borosilicate glasses adapt as well as soda-lime glasses to the technique of strengthening by ion exchange. That untreated and treated borosilicate glasses are more resistant to thermal shock than soda-lime glass. This confirms that borosilicate glasses are heat-resistant glasses