Synthesis of YBCO Superconducting Precursor using Organic metal salts method for Electric power transmission

유기금속염을 이용한 전력 전송용 YBCO 초전도 전구체 합성

The solid precursor produced by the dehydration of the gel at $120^{\circ}C$ for 12h is not in the amorphous state as expected but in a crystalline state. X-ray diffraction peaks of nearly the same angular position as the peaks of high Tc phase were observed in the precursor. Experimental results suggest that the intermediate phase formed before the formation of the superconducting phase may be the most important fact in determining whether it is easy to form the superconducting phase or not, because the nucleation barriers of the two superconducting phase may be altered by the variation of the crystal structures of those intermediate phase.