Fig. 3
Heating behavior of CHG and SDG. Selected heating curves measured at various rates, as indicated in the figure. a Chemically homogeneous glass (CHG) that was formed at a cooling rate of 20,000 K s−1. b Self-doped glass (SDG) that was formed at a cooling rate of 600 K s−1. The curves measured at the critical heating rates (6000 K s−1 for CHG in a and 20,000 K s−1 for SDG in b) are illustrated as bold curves
