In this contribution, high-temperature phase equilibria of the partly open Bi–Sr–Co–(O) system with oxygen content given by its activity in the surrounding atmosphere, were modelled based on the experimental phase diagram determined previously. For the assessment, we also used the previously reported thermodynamic data and phase equilibria for the quasibinary Bi–Co–(O), Sr–Co–(O) and Bi–Sr–(O) subsystems as well as the thermodynamic data of quaternary phases obtained from calorimetry and simultaneous thermal analysis. Namely, the oxide melt was described based on the Redlich-Kister parameters of the corresponding quasibinary systems and the solid oxides were considered as stoichiometric. Their heat capacity and entropy were determined from calorimetry and the enthalpy of formation was refined to reproduce their melting behaviour. The constructed phase diagram focused on solid-liquid equilibria is particularly important for designing the experiments of single crystal growth and melt assisted material processing of these highly significant cobaltites.

在此贡献中，根据先前确定的实验相图，对部分开放的Bi-Sr-Co-（O）系统的高温相平衡进行了建模，该系统的氧含量由其在周围大气中的活性给出。为了进行评估，我们还使用了先前报道的准二元Bi–Co–（O），Sr–Co–（O）和Bi–Sr–（O）子系统的热力学数据和相平衡以及四元体系的热力学数据。通过量热法和同时进行热分析获得的相。即，基于相应的准二元体系的Redlich-Kister参数描述了氧化物熔体，并且将固体氧化物视为化​​学计量的。通过量热法确定它们的热容量和熵，并细化形成焓以再现其熔融行为。