The Y2BaCuO5 (211) phase plays a very important role in the formation of Y-based superconducting materials. In this paper, we present the results of studies of 211 phase growth and morphology in peritectic liquid formed upon melt-processing of Y-superconductors. The influence of both the chemical nature and composition of the starting precursors is analysed. Some different ways of obtaining smaller inclusions of 211 in melt are shown. The influence of ultrasonic treatment of samples upon melting is also discussed.