Use of phase diagrams for the determination of phases in the lining of induction furnaces

Abstract

Quartzite powder compositions for molding the crucibles of induction furnaces can be likened to the three-component borosilicate system AI2Os--B=Os--Si02. There is a rough diagram of the phase relationship in this system according to Gillies and Foster given in [i, p. 137]. The triangle in this particular phase diagram (Fig. i) can be divided into three elementary triangles*: S--A2B--A3S~ (the point GI being invariant)$ A3S2--A--A2B (G2, invariant point); and S--A2B--B (invariant point not established, i.e., diagram not fully studied).