用Mg-NdBCO籽晶制备PMP-SmBCO单畴块材  

Fabrication of PMP-SmBCO Single Domain Superconductors by Mg-NdBCO Seeds

作　　者：徐晓燕[1,2] 卢亚锋[1,2] 冯建情[1] 张翠萍[1] 熊晓梅[1] 刘国庆[1] 于泽铭[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]东北大学,辽宁沈阳110004

出　　处：《稀有金属材料与工程》2008年第A04期185-188,共4页Rare Metal Materials and Engineering

基　　金：国家"863"项目;国家自然基金重点项目(50432050)

摘　　要：以NdBCO为基体,添加适量的MgO粉末,制备了自发形核生长的多畴样品。然后选用Nd-Ba-Cu-Mg-O为籽晶成功制备了具有单畴形貌的PMP-SmBCO块材。利用DTA、XRD和SEM分析了粉末的融化温度、晶体取向及微观组织形貌。结果表明添加质量分数1%MgO的NdBCO前驱粉末最高熔化温度比SmBCO粉末高了40℃以上,NdBaCuMgO籽晶与SmBCO样品晶体完全共格。A polydomain sample of in NdBCO-based powder with appropriate MgO addition was grew through spontaneous nucleation. Then single domain PMP-SmBCO bulk was prepared successfully using as-prepared NdBCO as seed. The melting temperature, crystalline orientation and microstructure were investigated by DTA, XRD and SEM. It is found that NdBCO precursor powder with 1wt% MgO has a higher melting temperature above 40 ℃ than that without addition. NdBaCuMgO retains a coherent lattice relationship with PMP-SmBCO.

关 键 词：Mg-NdBCO籽晶 最高熔化温度 PMP-SmBCO块材 

分 类 号：TG146[一般工业技术—材料科学与工程]