Properties of screen-printed Ho-Ba-Cu-O films on YSZ substrates

摘要

High-T_c screen-printed Ho-Ba-Cu-O films were prepared on YSZ substrates by a melt processing method. The films were fired at T_s = 1000-1050℃ for 5 min and cooled to 450℃ by two steps in flowing O_2. The maximum critical current density J_c (77 K, 0 T) of 2.0 x 10~3 A cm~(-2) was only attained under much limited firing conditions; T_s = 1020℃ and cooled to 800℃ at a cooling rate of 400℃ h~(-1).