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不同方法制備的Gd2BaCuO5粉體性能比較
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Comparison of Characteristics of Gd2BaCuO5 Powders Prepared by Different Processes
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Supported by the National Natural Science Foundation of China (50572009)

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    摘要:

    采用低溫燃燒合成法(LCS)、共沉淀法和固相法合成了超細(xì)Gd2BaCuO5 (Gd211)粉體,并對(duì)3種粉體的形貌、化學(xué)純度、比表面積和粒度進(jìn)行了比較。結(jié)果表明,LCS工藝制備的Gd211粉體粒度最小,團(tuán)聚最輕。將以上3種粉體作為摻雜劑制備GdBa2Cu3O5 (Gd123)超導(dǎo)塊材,塊材的微觀形貌說明微細(xì)Gd211粉體的添加能有效減小Gd123塊體中Gd211顆粒粒度,臨界電流密度的比較表明LCS法所制粉體的添加比另外兩種粉體更能有效提高臨界電流密度

    Abstract:

    Ultra-fine Gd2BaCuO5(Gd211) powders were prepared by three different routes including low temperature combustion synthesis (LCS), coprecipitation and solid state reaction. The powders were characterized in terms of morphology, chemical purity, specific surface area and particle size. The results show that LCS process yields the most weakly agglomerated powder with smallest average particle size. The microstructure and superconductor property of GdBa2Cu3O5(Gd123) bulk material fabricated from the precursor of Gd211 powders were also studied. It is found that the employment of fine Gd211 starting powder is effective for the size reduction of Gd211 particles in the bulk samples. Gd123 bulk produced from LCS powder achieved the largest critical current density (Jc) value compared with those from other two powders.

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馮 巧,馬小海,燕青芝,肖 玲,焦玉磊,葛昌純.不同方法制備的Gd2BaCuO5粉體性能比較[J].稀有金屬材料與工程,2010,39(4):574~577.[Feng Qiao, Ma Xiaohai, Yan Qingzhi, Xiao Ling, Jiao Yulei, Ge Changchun. Comparison of Characteristics of Gd2BaCuO5 Powders Prepared by Different Processes[J]. Rare Metal Materials and Engineering,2010,39(4):574~577.]
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  • 收稿日期:2009-04-27
  • 最后修改日期:2009-12-15
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