Systematic study of the microstructures and electrical and superconducting properties of nanocarbon doped MgB2 tapes

	Systematic study of the microstructures and electrical and superconducting properties of nanocarbon doped MgB2 tapes
	Ma YW(马衍伟)
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2007
通讯作者	马衍伟
中文摘要	A series of C doped and undoped MgB2 tapes sintered at 600 -950 degrees C was fabricated. The relationships between the critical current properties, crystallinity and microstructures were systematically studied as functions of the C doping level and heating conditions. A decrease in the a-axis length due to carbon substitution was observed in the C doped samples. The full width at half maximum (FWHM) of the MgB2 (101) peak increased with increasing C doping level, suggesting that the introduction of lattice defects and/or the decrease of the grain size of MgB2 occurred on C doping. Due to the substitution of C for B, the upper critical field was improved in C doped MgB2 samples. Substantially improved critical current density, J(c), was found in all of the C doped samples. At 4.2 K, 10 T, J(c) reached 2.2 x 104 A cm(-2) in the 8% C doped samples.
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	A series of C doped and undoped MgB2 tapes sintered at 600 -950 degrees C was fabricated. The relationships between the critical current properties, crystallinity and microstructures were systematically studied as functions of the C doping level and heating conditions. A decrease in the a-axis length due to carbon substitution was observed in the C doped samples. The full width at half maximum (FWHM) of the MgB2 (101) peak increased with increasing C doping level, suggesting that the introduction of lattice defects and/or the decrease of the grain size of MgB2 occurred on C doping. Due to the substitution of C for B, the upper critical field was improved in C doped MgB2 samples. Substantially improved critical current density, J(c), was found in all of the C doped samples. At 4.2 K, 10 T, J(c) reached 2.2 x 104 A cm(-2) in the 8% C doped samples.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/303]
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. Systematic study of the microstructures and electrical and superconducting properties of nanocarbon doped MgB2 tapes[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2007.
APA	马衍伟.(2007).Systematic study of the microstructures and electrical and superconducting properties of nanocarbon doped MgB2 tapes.SUPERCONDUCTOR SCIENCE & TECHNOLOGY.
MLA	马衍伟."Systematic study of the microstructures and electrical and superconducting properties of nanocarbon doped MgB2 tapes".SUPERCONDUCTOR SCIENCE & TECHNOLOGY (2007).