Reaction between Alkaline Earth Metal Doped Lanthanum Chromite and Yttria Stabilized Zirconia

The solid state relations between alkaline earth metal doped lanthanum chromite and 7.5 mole % yttria stabilized zirconia (7.5YSZ) in air have been investigated. A reaction product of the mixture of 7.5YSZ and (La_0.7Sr_0.3)CrO₃ heated at 1500 °C for 24 h was found to be Sr₄Zr₃O₁₀. (La_1-xSr_x)CrO₃ (x = 0.1 and 0.2) showed no reaction product with 7.5YSZ at 1500 °C for 168 h. In the couple of 7.5YSZ and La(Cr_0.8Mg_0.2)O₃, La₂Zr₂O₇ was observed after heating at 1500 °C for 96 h. No reaction product between 7.5YSZ and (La_1-xCa_x)CrO₃ ( https://www.w3.org/1998/Math/MathML"> x = 0.1 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003421290/07e4de97-c68f-4ca1-95b4-28d8b410031d/content/eq665.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> , 0.2 and 0.3) was found at 1500 °C for 168 h. It was found that all the elements of the perovskites diffused into 7.5YSZ at 1500 °C.