自从Bednorz和Muller发现氧化物高温超导电性以来,世界各国的物理学家、化学家和材料科学家进行了大量的广泛的研究。五年来,发表的论文超过2万篇,超导临界温度和临界电流密度都有大幅度提高,使材料和薄膜的质量不断提高,有的指标已达到或接近实用 Since Bednorz and Muller discovered oxides of high temperature superconductivity, physicists, chemists and material scientists from around the world have conducted extensive and extensive research. Over the past five years, published more than 20,000 papers, the superconducting critical temperature and critical current density have greatly increased, so that the quality of materials and films continue to improve, and some indicators have reached or approached practical