Thermodynamics properties of Bi₃₈ZnO₅₈ and phase equilibria of Bi₂O₃–ZnO system

The Bi₂O₃–ZnO system is of interest for optimization of the electro-ceramic synthesis process. There are some limitations and conflictions in the experimental studies of the Bi₂O₃–ZnO phase diagram in literature. In this work, five Bi₂O₃–ZnO compositions were prepared and characterized. The Bi₃₈ZnO₅₈ compound was confirmed, and its heat capacities and phase transformation properties were detected. A thermodynamic description of the Bi₂O₃–ZnO system was carried out based on the present work and previous studies. A set of thermodynamic database and the calculated phase diagrams of the Bi₂O₃–ZnO system were provided, which help to explain the discrepancies in literature.