本文描述了高温氧化物超导体交流磁化率的测量原理、装置和测试方法。通过测量交流磁化率χ_(ac)与温度T的关系曲线,可测定磁转变温度和进行超导相体积含量分析;以同体积纯Pb为完全抗磁性标样,可以比较YBCO不同热处理制度对超导相体积含量、转变温度Tc的影响及其抗磁性与顺磁性比例,并可测量多相超导体各相V_s体积相对含量百分数。 This paper describes the measuring principle, device and test method of AC susceptibility for high temperature oxide superconductors. By measuring the relationship between magnetic susceptibility χ_ (ac) and temperature T, the magnetic transition temperature can be measured and the volume fraction of superconducting phase can be measured. With the same volume of pure Pb as the complete diamagnetic standard, The phase volume fraction, the transition temperature Tc, the ratio of diamagnetic to paramagnetic, and the relative percentage content of V_s volume of each phase of the multi-phase superconductor.