Abstract
Ca 1− x CuO 2 contains an infinite one-dimensional edge-sharing [CuO 2] chain and is readily fabricated by a solid-state reaction in a moderate oxygen atmosphere (10–12 bar). High-temperature (890–1170 °C) and high-pressure (3.0–5.0 GPa) sintering was used to study the stability of the Ca 1− x CuO 2 samples. We found that the Ca 1− x CuO 2 chain structure remained stable at high temperature, high pressure and high oxygen pressure. However, we found that the stoichiometry of the Ca 1− x CuO 2 compound is modified after high-pressure sintering, suggesting that high-pressure sintering may increase the calcium content of the Ca 1− x CuO 2 chain structure.
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