Mechanical Characterization of BSCF, a Prospective Perovskite Material for Oxygen Separation Membrane: A Brief Review

Abstract

Ba0.5Sr0.5Co0.8Fe0.2O3‐δ (BSCF) is a mixed ionic electronic conducting membrane (MIEC) material which can be used for the separation of oxygen from air in both coal gasification and oxy‐fuel power plants. It shows the best oxygen separation performance at elevated temperatures (>800 °C). In this review paper, its mechanical behavior over a wide range of temperature is addressed. From the studies done so far, it is evident that BSCF shows a unique pattern in the temperature dependence of fracture toughness and Young's modulus. It poses a problem from the view point of structural stability of oxygen separation membrane, particularly during start‐up period or thermal cycling. Number of possible explanations have been put forward in recent past but most of them are speculative in nature and lacks in experimental support.

The Neck to Particle Ratio Effect on the Mechanical and Morphological Sintering Features of Porous Stainless Steel (SS) Hollow Fibers

“…A common feature of these inorganic hollow fibres is their easy and low cost of fabrication which is desirable for industrial application. However, a common problem is the lack of mechanical strength as ceramic hollow fibres are brittle and break quite easily [5].…”

Microstructural and Interfacial Designs of Oxygen‐Permeable Membranes for Oxygen Separation and Reaction–Separation Coupling

“…Recently, a production method based on mixed ionic–electronic conducting (MIEC) membranes, which can produce high‐purity oxygen with higher energy efficiency and lower investment cost than the cryogenic distillation technology, has gained much attention from academic and industrial communities . In contrast to the physical permeation behavior occurring on microporous membranes and polymer membranes, this mechanism is an electrochemical permeation of oxygen through MIEC membranes.…”

Stability and electrochemical performance of nanostructured La2CuO4+δ cathodes

“…Numerous cathode materials with enhanced performance, compared to the conventional La 0.8 Sr 0. . However, these cobalt-based electrodes often suffer from several drawbacks, such as the high cost of cobalt, high thermal expansion coefficients and phase degradation in the case of BSCF [13,14]. Among other studied compounds, Ruddlesden-Popper phases, Ln 2 MO 4þd (Ln ¼ La, Pr and Nd; M ¼ Ni and Cu), are of particular interest due to their high mixed ionic and electronic conductivity, moderate thermal expansion coefficients and mechanically compatible with the electrolyte.…”