Influence of oxygen contents of carbohydrate dopants on connectivity and critical current density in MgB2 tapes

	Influence of oxygen contents of carbohydrate dopants on connectivity and critical current density in MgB2 tapes
	Ma YW(马衍伟)
刊名	APPLIED PHYSICS LETTERS
	2007
通讯作者	马衍伟
中文摘要	More recently, it has been reported that carbohydrate doping resulted in an effective substitution of carbon for boron in MgB2, and hence achieved significant flux pinning enhancement. However, the authors found that the oxygen amount in carbohydrate additives played an important role in improving J(c)-B performance in MgB2. In this work, the effect of maleic anhydride (C4H2O3) and maleic acid (C4H4O4) dopants on the superconducting properties of in situ MgB2 tapes has been studied. Compared to the undoped counterpart, both doped tapes showed an enhancement of J(c) values by more than an order of magnitude in high-field region; however, the transport J(c) of C4H4O4 doped tapes was apparently lower than that of C4H2O3 added samples. The poor grain connectivity as a result of more MgO and voids formed during the reaction in C4H4O4 doped samples can be responsible for the reduced J(c) values.
学科主题	材料合成与加工工艺
收录类别	1
公开日期	2010-09-29
附注	More recently, it has been reported that carbohydrate doping resulted in an effective substitution of carbon for boron in MgB2, and hence achieved significant flux pinning enhancement. However, the authors found that the oxygen amount in carbohydrate additives played an important role in improving J(c)-B performance in MgB2. In this work, the effect of maleic anhydride (C4H2O3) and maleic acid (C4H4O4) dopants on the superconducting properties of in situ MgB2 tapes has been studied. Compared to the undoped counterpart, both doped tapes showed an enhancement of J(c) values by more than an order of magnitude in high-field region; however, the transport J(c) of C4H4O4 doped tapes was apparently lower than that of C4H2O3 added samples. The poor grain connectivity as a result of more MgO and voids formed during the reaction in C4H4O4 doped samples can be responsible for the reduced J(c) values.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/349]
专题	电工研究所_超导材料及强磁场科学研究组_超导材料及强磁场科学研究组_期刊论文
推荐引用方式 GB/T 7714	Ma YW. Influence of oxygen contents of carbohydrate dopants on connectivity and critical current density in MgB2 tapes[J]. APPLIED PHYSICS LETTERS,2007.
APA	马衍伟.(2007).Influence of oxygen contents of carbohydrate dopants on connectivity and critical current density in MgB2 tapes.APPLIED PHYSICS LETTERS.
MLA	马衍伟."Influence of oxygen contents of carbohydrate dopants on connectivity and critical current density in MgB2 tapes".APPLIED PHYSICS LETTERS (2007).