2超導(dǎo)體臨界溫度為39 K,具有價(jià)格低廉和臨界轉(zhuǎn)變溫度相對(duì)較高等優(yōu)點(diǎn),具有工程應(yīng)用前景,然而其大尺度應(yīng)用還依賴(lài)于超導(dǎo)性能的改善。經(jīng)過(guò)系統(tǒng)的研究發(fā)現(xiàn)高能球磨和元素?fù)诫s是提高M(jìn)gB2磁場(chǎng)下Jc性能最有效的方法。本文介紹了采用高能球磨法制備MgB2的研究現(xiàn)狀,采用高能球磨能有效細(xì)化晶粒,有利于提高超導(dǎo)芯絲的致密度,強(qiáng)化MgB2晶粒的連接性,同時(shí)晶粒細(xì)化形成的更多晶界能形成釘扎中心,進(jìn)一步提高線/帶材在高磁場(chǎng)下的臨界電流密度。我們還介紹了通過(guò)分步反應(yīng)法和高能球磨在常壓條件下合成MgB2,高能球磨法可以減少M(fèi)gB2長(zhǎng)線中的孔洞并提高粉體密度。"/>

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高能球磨法制備MgB2材料的研究進(jìn)展
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西北有色金屬研究院,西部超導(dǎo)材料科技股份有限公司,西北有色金屬研究院,西北有色金屬研究院,西北有色金屬研究院,西部超導(dǎo)材料科技股份有限公司,西北有色金屬研究院,西北有色金屬研究院,西部超導(dǎo)材料科技股份有限公司

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國(guó)家自然科學(xué)基金(51302226和51372207)項(xiàng)目,國(guó)家“973”計(jì)劃(2011CBA00104) 和“863”計(jì)劃(2014AA032701),陜西省自然(2014JQ6198)和陜西省創(chuàng)新團(tuán)隊(duì)(2013KCT-07)


Research Progress of MgB2 Superconducting MaterialsPrepared by High-energy Ball Milling
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Northwest Institute for Nonferrous Metal Research,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an

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    摘要:

    MgB2超導(dǎo)體臨界溫度為39 K,具有價(jià)格低廉和臨界轉(zhuǎn)變溫度相對(duì)較高等優(yōu)點(diǎn),具有工程應(yīng)用前景,然而其大尺度應(yīng)用還依賴(lài)于超導(dǎo)性能的改善。經(jīng)過(guò)系統(tǒng)的研究發(fā)現(xiàn)高能球磨和元素?fù)诫s是提高M(jìn)gB2磁場(chǎng)下Jc性能最有效的方法。本文介紹了采用高能球磨法制備MgB2的研究現(xiàn)狀,采用高能球磨能有效細(xì)化晶粒,有利于提高超導(dǎo)芯絲的致密度,強(qiáng)化MgB2晶粒的連接性,同時(shí)晶粒細(xì)化形成的更多晶界能形成釘扎中心,進(jìn)一步提高線/帶材在高磁場(chǎng)下的臨界電流密度。我們還介紹了通過(guò)分步反應(yīng)法和高能球磨在常壓條件下合成MgB2,高能球磨法可以減少M(fèi)gB2長(zhǎng)線中的孔洞并提高粉體密度。

    Abstract:

    Since the discovery of superconductivity at 39 K in MgB2, it has been considered as one of the most promising candidates for engineering applications due to its low material cost and relativity high critical transition temperature. However, the realization of large-scale application for MgB2 based superconducting technology essentially relies on the improvement of superconducting properties of MgB2. Some techniques have been developed to improve the critical current density, such as chemical doping, high-energy ball milling and various processing techniques. We introduce some research progress of MgB2 superconducting materials prepared by high-energy ball milling. The investigation showed high-energy ball milling is effective to obtain high density and fine grain size MgB2with high Jc performance. We also introduce that high Jc MgB2 was synthesized by two-step reaction method and high-energy ball milling. High-energy ball milling may be a good choice for reducing the void percentage and enhancing the average density in MgB2 long wires.

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楊芳,閆果,張平祥,王慶陽(yáng),熊曉梅,李少?gòu)?qiáng),馮建情,李成山,馮勇.高能球磨法制備MgB2材料的研究進(jìn)展[J].稀有金屬材料與工程,2017,46(5):1452~1456.[Yang Fang, Yan Guo, Zhang Pingxiang, WangQingyang, Xiong Xiaomei, Li Shaoqiang, Feng Jianqing, Li Chengshan, Feng Yong. Research Progress of MgB2 Superconducting MaterialsPrepared by High-energy Ball Milling[J]. Rare Metal Materials and Engineering,2017,46(5):1452~1456.]
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  • 收稿日期:2015-01-22
  • 最后修改日期:2015-03-03
  • 錄用日期:2015-03-25
  • 在線發(fā)布日期: 2017-09-27
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