Yttrium chromite

Paulik SW, Baskaran S, and Armstrong TR. Mechanical properties of calcium-sub-situted yttrium chromite. J. Mater. Lett. 1999 18 819-822. 

The ceramic interconnects used in higher temperature SOFCs are primarily doped lanthanum and yttrium chromites (dopants typically include Mg, Sr, Ca, Ca/Co). These perovskites are unique in that they exhibit high electronic conductivity and resist reduction under exposure to syngas at high temperatures. Electronic conductivity of these materials increases with temperature (making them unsuitable for use at low temperatures). At 1,000 °C the conductivities of these materials... 

Ceramic (lanthanum or yttrium chromite) suitable for high-temperature operation (900 to 1000 °C). These materials, while chemically stable and compatible with the MEA from a chemical and thermal expansion perspective, are mechanically weak and costly. 

The ceramics derived from pure and doped binary oxides mentioned in the same survey were lead titanate (PT) [47], lead titanate zirconate (PZT) [48,49], La and Li co-doped PZT [50], doped and undoped lanthammi and yttrium chromite [51-53], yttrium aluminum garnet [54-56], zirconiiun sihcate [57,58], and aluminum titanate [59,60]. 

J.L. Bates, L.A. Chick, and W.J. Weber, Synthesis, air sintering and properties of lanthanum and yttrium chromites and manganites. Solid State Ionics 52, 235-242 (1992)... 

Metselaar, R. Huyberts, M. A. H. (1973). The stoichiometry and defect structure of yttrium iron garnet and the nature of the centres active in the photomagnetic effect. Journal of Physics and Chemistry of Solids, 34,2257-63. Miyahara, S. Ohnishi, H. (1956). Cation arrangement and magnetic properties of copper ferrite-chromite series. Journal of the Physical Society, Japan, 11, 1296-7. 

Regarding ceramic-containment materials," sihca, SiO, and alumina, Al O, are strongly attacked and hence readily dissolve in liquid lithium. By contrast, alkaline-earth oxides such as beryllia (BeO), magnesia (MgO), and calcia (CaO) and rare-earth oxides such as ceria (CeOJ, yttria (YfiJ, chromite spinel (FeCr OJ, and yttrium aluminum garnet (Y AljOj ) seem to be noncorroded below 500 C, while aluminum, titanium, and zirconium nitrides or... 

Optimizing the materials [yttrium-stabilized zirconia (YSZ) for the electrolyte, lanthanum strontium manganite for the cathode, nickel for the anode, and lanthanum magnesium chromite for the interconnect]. 

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