Ultrarapid Microwave Synthesis of Superconducting Refractory Carbides
Ultrarapid Microwave Synthesis of Superconducting Refractory Carbides
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DOI：
10.1002/adma.200900968
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发表时间：
2009-11
影响因子：
29.4
通讯作者：
S. Vallance;David M. Round;C. Ritter;E. Cussen;S. Kingman;D. Gregory
中科院分区：
文献类型：
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作者：
S. Vallance;David M. Round;C. Ritter;E. Cussen;S. Kingman;D. Gregory
用高功率微波合成Nb1−xTaxC碳化物，反应时间小于30 S，通过原位和非原位实验研究了材料的介电性能和温度随时间的变化，结果表明，随着材料的损耗正切减小，反应自行终止。生成的碳化物是缺碳的超导材料；T_c与单位晶胞体积呈线性相关，在NBC时达到最大。
Nb1−xTaxC Carbides can be synthesized by high power MW methods in less than 30 s. In situ and ex situ techniques probing changes in temperature and dielectric properties with time demonstrate that the reactions self-terminate as the loss tangent of the materials decreases. The resulting carbides are carbon deficient and superconducting; Tc correlates linearly to unit cell volume, reaching a maximum at NbC.