摘要
YBCO(YBa2Cu3O7-x)超导粉的制备方法有固体粉末法和湿化学法.湿化学法的优点是溶质具有达到离子级的接触而发生反应,所制备的产物颗粒均匀,尺寸小,烧结温度低,节约能源.其结构表征可以通过X射线衍射、扫描电镜(SEM)、透射电镜分析(TEM)和红外光谱.由湿化学的柠檬酸热解法,是目前既简单又有效的YBCO纳米粉制备技术,本文初步探索了用低温度和短时间烧结的YBCO纳米粉,具有颗粒小,杂质少,晶格较清晰,有助于改善和提高YBCO超导性能,开发和制备出第三代超导体材料.
Superconducting YBCO (YBa_2Cu_3O_(7-x)) powder were prepared by several different techniques. The most important advantages of the wet chemistry method are the homogeneity at atomic level and possibility to reduce annealing temperature and time to limit thermal agglomeration of the particles. The structure and morphology of the YBCO powder were characterized by powder X-ray diffraction、 scanning electron microscopy、 transmission electron microscopy and spectrum analysis. The citrate pyrolysis technique is a simple and effective way to prepare YBCO nanopowder so far. With lower annealing temperature and shorter time, the microstructure of YBCO nanopowder were exploring here, the results showed that the obtained YBCO nanopowder have small grain size and superfine lattice, Currently there are attempts at using such fine powder to fabricate the third generation of high-Tc superconducting materials.
出处
《福州大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第1期94-97,110,共5页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(50372052)
福建省教育厅科研资助项目(JB03012)
关键词
YBCO
纳米粉末
制备
表征
YBCO
nanopowder
prepare
characterization
