NDLI: Preparing <formula formulatype=inline><tex Notation=TeX>${rm MgB}_{2}$</tex></formula> With Excessive Mg Environment Sintering and Two-Step Sintering Approach

Content Provider	IEEE Xplore Digital Library
Author	Sihai Zhou Yun Zhang Pan, A.V. Shixue Dou Koochae Chung Jaimoo Yoo
Copyright Year	2002
Abstract	MgB₂ superconductors were made with two processes in this work. In one case, the SiC doped MgB₂ pellets were sintered in excessive Mg medium. It is found that the samples sintered in excessive Mg medium present Mg-rich composition comparing with the one sintered in Ar gas. The density is higher and the resistance is lower due to the penetration of the Mg into the pores and grain boundary of MgB₂, which is beneficial to the J_c improvement. In the other case, a two-step process was employed to make MgB₂. J_c of the sample with the composition of MgB₄ is very low after the first sintering. The J_c was dramatically improved after the second sintering, but J_c of the two-step made sample is still poorer than the MgB₂ made with general one step sintering due to the connectivity deterioration caused by the pulverization prior to the second sintering.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2748
Ending Page	2751
Page Count	4
File Size	985546
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High temperature superconductors Silicon carbide Superconducting materials Superconductivity Fabrication Argon Grain boundaries Doping Protection Current density superconductor Critical current density ${\rm MgB}_{2}$ SiC doping
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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