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Element addition effects of YBa2Cu3O7-y ceramics on the superconductivity have been studied. Fifty-two kinds of elements, and 163 compositions have been investigated but no element capable of improving the critical temperature (Tc) was found. Pb, Al and W were chosen additives and have been studied in detail about the changes in the superconducting properties and the crystal structures by the ratios of addition. Pb and W had almost no solubility in YBa2Cu3O7-y. The crystal structure of YBa2Cu3O7-y changed from orthorhombic to tetragonal by the addition of Al or W. Tc was lowered along with the change of the crystal structure.

nihon seramikkusu kyoukai gakujyutsu rombunshi/nippon seramikkusu kyōkai gakujutsu rombunshi

Element Addition Effect for Superconducting Properties of YBa&lt;sub&gt;2&lt;/sub&gt;Cu&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;7-&lt;i&gt;y&lt;/i&gt;&lt;/sub&gt; Ceramics