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超导材料MgB_2的合成

Keywords: 超导体,MgB2,传统无压烧结(PLS)

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Abstract:

为了获得高纯度的MgB2块材,以Mg粉和B粉为原料,在流动的氢气中,用传统无压烧结方法成功地制备出MgB2块材.系统研究了传统无压烧结合成MgB2块材的工艺;重点讨论了制备过程中的各项参数对样品纯度的影响,包括烧结温度,保温时间,原料的配比等;并且找出了最佳的工艺参数.实验表明,当Mg和B的原子比为1:2≤n(Mg):n(B)≤1.2:2,烧结温度为750℃,保温3h得到了成分单一的块材.样品的超导转变温度接近39K.

References

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