自1911年 Onnes 发现汞的超导电性后的75年中,虽经大量研究工作,超导材料的临界温度仅达23.2K(Nb_3Ge)。1987年2月以来,陆续报道关于 Y-Ba-Cu-O 系超导材料研制的初步结果,这类超导体在液氮温区呈现零电阻。本文介绍一种 Y-Ba-Cu-O 系陶瓷超导体的研究结果,其化学组成与上述文献所述不同,且烧结与热处理工艺甚简单。 In the 75 years since Onnes discovered the superconductivity of mercury in 1911, the critical temperature of the superconducting material was as high as 23.2K (Nb_3Ge) despite extensive research work. Since February 1987, one after another reported preliminary results on the development of Y-Ba-Cu-O based superconducting materials. Such superconductors exhibit zero resistance in the liquid nitrogen temperature region. This paper presents the results of a Y-Ba-Cu-O based ceramic superconductor, whose chemical composition is different from that described above, and the sintering and heat treatment process is very simple.