Phase transformations in calcium-substituted lanthanum ferrite

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[1] Price, Patrick M.
[2] Rabenberg, Ellen
[3] Thomsen, David
[4] Misture, Scott T.
[5] 1,Butt, Darryl P.
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Price, P.M. (patrickprice42@gmail.com) | 1600年 / Blackwell Publishing Inc., Postfach 10 11 61, 69451 Weinheim, Boschstrabe 12, 69469 Weinheim, Deutschland, 69469, Germany卷 / 97期
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Phase equilibria in the La1-xCaxFeO 3-δ (LCF) system were assessed at temperatures below 1350°C in both simulated air and argon atmospheres using a combination of differential scanning calorimetry; thermogravimetric analysis; scanning electron microscopy; and high-temperature X-ray diffraction. The solubility limit of Ca in the perovskite structure was determined to be 38% A-site substitution. A high-temperature orthorhombic to rhombohedral transition was identified and the dependence on oxygen partial pressure and effect on thermal expansion were characterized. A partial; pseudobinary LaFeO3-CaFeO2.5 phase diagram is presented that is based on these analyses combined with data available in the open literature. © 2014 The American Ceramic Society;
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