在（BiPb）2Sr2Ca2Cu3O(10＋δ)／nano—SiC复合材料中，纳米SiC粒子掺加适量时可在5K的低温下有效地钉扎磁通，并在77K的较高运行温度下仍能抑制超导体的热激活磁通蠕动，成为有效的磁通钉扎中心，但对临界转变温度无多大影响．
The influences of nano-SiC on the superconducting properties of Bi2223, especially on the flux pinning have been studied by using XRD, SEM, SQUID, VSM. The results reveal that the nano-particles of SiC do not change the transition temperature obviously. The magnetization areas on the M - H curve, intragranular critical density Jcm and average flux pinning force Fp were improved due to proper amount of nano-SiC addition at temperature 5 K and 77 K. According to these evidences, we can infer that the nano-SiC particles introduced and homogenuosly dispersed in superconducting matrice take the role of effective flux pinning centers.
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