Local structure and glass transition temperature in binary glasses

Abstract

We present in this article a new relationship between the glass transition temperature, T g, and the local glass structure, dealing with binary glasses and involving the rate of local coordination. In IV–VI based glasses, the predicted coordination number ratio is 3/4, according to the presence of Q (4) and Q (3) units. Experimental measurements lead to the value of 0.66–0.85. The new relationship is applied to B 2 S 3 and P 2 S 5 based glasses, and the unusual behavior of T g is explained by the possibility of modifier-rich clustering effects.