| 摘要 |
PURPOSE:To obtain the titled superconductor having high offset temperature and narrow interval of temperature from onset to offset, by separating mixed powder obtained by preliminarily burning a starting raw material mixture and pulverizing the mixture, using a magnet and utilizing magnetic repulsion by meissner effect. CONSTITUTION:A mixed powder 10 consisting of mixture of powder 2 exhibiting superconductivity and powder 3 exhibiting no superconductivity and obtained by collecting plural kind of starting raw materials at a ratio capable of providing composition of the aimed product, mixing, preliminarily burning and pulverizing the mixture is charged into a vessel 1. Then a magnet 4 is arranged at the bottom of the vessel 1 and line of magnetic force 5 is passed into the mixed powder 10 and the vessel 1 is vibrated or inside of the vessel 1 is stirred using a proper stick to move the mixed powder 10 and a superconductor 2 reflecting lines of magnetic force is collected to upper part further from the magnet 4 by action of diamagnetics, i.e., repulsion by Meissner effect and on the other hand a powder 3 exhibiting no superconductivity is collected to the lower part and separated and only the superconductive powder 2 at upper part is collected and formed and burned. |
