【摘要】 为制备高２２２３相含量的Ｂｉ系超导块材，提出退火处理前施以６ＧＰａ高压冷处理的工艺．利用这种方法，可使２２２３相的形成速度得到很大加快．从２２１２相出发，经分别为２０小时的退火和缓冷后，样品接近单２２２３相．考察了２２１２相样品退火各阶段的相结构，并粗略地分析了２２２３相的生成过程，初步解释了压力处理促进２２２３相生成的机理．基于以上讨论，提出一个制备较高质量Ｂｉ系超导块材的方法，其复现率很好．更多还原

【Abstract】 AbstractThe reason why the formation of single 2223 phase of Bi-system superconductor is a timeconsuming process is, due to the hindered atomic diffusion, while the sample becames severely POrous. In this paper, we have Performed a study of the effect of atomic diffusion on the formation process of 2223 phase. By means of a high pressure treatment of 6GPa before annealing, we have significantly short6ned the annealing time from> 100h to nearly 40h, with the content of 2223 phase elevated to >90%. An epitaxy growth mechanism of high Tc phases is also proposed. Thus, an approach of "pressing→annealing→cooling " is benefit to preparing high quality bulk BiSrCaCuO superconducting materisl.更多还原