The phase relations involving the 24 K n ‐type Nd 2‐ x Ce x CuO 4 superconductor were investigated at 1000°C in air. The terminal solid solubility was confirmed to be x = 0.2. This solid solution is the only ternary phase in the Nd 2 O 3 –CeO 2 –CuO diagram. A binary (1 − y )CeO 2 – y NdO 1.5 solid solution exists out to y = 0.4. Phase diagrams for NdO 1.5 –CeO 2 –CuO (1000°C) and NdO 1.5 –CeO 2 (900° to 1500°C) are presented.
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Pieczulewski et al. (1990) studied this question.
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