When screen printed and sintered CdS specimen with a typical polycrystal microstructure is heat treated in a $ZnCl_2$ atmosphere at 600°C, the chemically induced grain boundary migration has occurs, producing CdZnS solid solution behind migrating grain boundary. This system shows various morphologies of migrating grain boundaries, which are typical in CIIM. Especially, some grain boundaries appear to have spiral structure. This result shows that Chemically Induced Interface Migration is a general phenomenon which can occur in ionic/covalent bond materials as well as in metallic systems. It became clear that the irregular microstructure in $Cd_{1-x}Zn_xS$ sintering is due to CIIM.
