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High critical temperature, Tc, YBa2Cu4O8 superconducting oxides have been prepared by a solution technique using ethylenediaminetetraacetic acid (EDTA) as complexing agent. The use of an appropriate complexing agent leads to complete mixing of the Y3+, Ba2+ and Cu2+ cations, and thus facilitates formation of YBa2Cu4O8 at a lower temperature. The effect of pH on the homogeneity of samples is discussed...
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