“…The authors experimentally determined the critical cooling rate for ferro nickel slag. 2) Since the composition of practical slag is very complicated, the investigation of the critical cooling rates for simple compositions seems to be desirable. In this study the critical cooling rates have been measuredfor R20(R = Li, Na and K)-Si02 and R'O(R' = Ca, Sr and Ba)-Si02 systems by the combined use of the hotthermocouple methodand an ordinary melt-quenching method.…”