期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：8
页码：6926
DOI：10.15680/IJIRSET.2015.0408182
出版社：S&S Publications
摘要：Ex-situ powder in tube manufacturing process is based on the filling of a metal sheath with presynthesizedMgB2 powders. It is necessary for MgB2 used in wire manufacturing to have the required properties ofgrain size and connectivity. Synthesis temperature for MgB2 is an important parameter to improve the quality ofpowders and subsequently enhance performances of wire for large-scale applications. In this work we investigated theeffect of synthesis temperature on morphology, and how this is reflected on superconducting properties. A detailedstudy on the influence of MgB2 synthesis temperature on grain size has been given, evaluated through SEM imagesand magnetic measurement, by applying a model for average grain size distribution based on the penetration ofmagnetic field in the superconductor, that was found to be in agreement with several other methodologies. Engineeringcurrent density has been evaluated from direct measurement using a four-probe configuration.
关键词：SPION; Stirring rate; Coating materials; Magnetic characteristics; Biomedical applications
