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Three solid solution phases in the SrO-CaO-CuO system, Sr2-xCaxCuO3(0≤x≤2), Sr1-xCaxCuO2(0≤x≤0.5) and Sr3-xCaxCu5Oy(0≤x≤1.8), were prepared at 1273K under 0.1MPa of oxygen. These phases showed semiconducting behavior below 300K. The highest conductivity of 6.3×103S⋅ m-1 at 300K was measured for Sr3-xCaxCu5Oy(x=1.8).
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Yamane et al. (1990) studied this question.
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