전력용 Nanocomposite의 열화학 특성

Thermal Properties of Ploymide Nanocomposite

We have fabricated superconductor ceramics by chemical process. A high Tc superconductor with a nominal composition of ${Bi_2}{Sr_2}{Ca_2}{Cu_3}{O_y}$ was prepared by the organic metal salts method. Experimental results suggest that the intermediate phase formed before the formation of the superconductorphase may be the most important factor. The relation between electromagnetic properties of Bi HTS and external applied magnetic field was studied. The electrical resistance of the superconductor was increased by the application of the external magnetic field. But the increase in the electrical resistance continues even after the removal of the magnetic field. The reason is as followsthe magnetic flux due to the external magnetic field penetrates through the superconductor and the penetrated magnetic flux is trapped after the removal of the magnetic flux.