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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Giant negative thermal expansion in ultrafine-grained Mn_3(Cu_(l-x)Ge_x)N (x = 0.5) bulk
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Giant negative thermal expansion in ultrafine-grained Mn_3(Cu_(l-x)Ge_x)N (x = 0.5) bulk

机译：超细晶粒Mn_3（Cu_（l-x）Ge_x）N（x = 0.5）块中的巨大负热膨胀

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摘要

The advanced negative thermal expansion (NTE) properties of the ultrafine-grained Mn_3(Cu_(1-x)Ge_x)N compound bulk have been reported. The developed preparation route has reduced the fabrication time by more than ten times in contrast to previous studies. As compared with the coarse-grained compound bulk, the NTE start temperature of the ultrafine Mn_3(Cu_(1-x)Ge_x)N (x = 0.5) bulk is reduced to 250 K, and the coefficient of negative thermal expansion (CNTE) reaches -23.7 x 10~(-6) K~(-1), which is remarkably improved. It is found that the nitrogen content in the starting manganese nitride also has significant effects on the NTE start temperature, operating temperature range and CNTE.
机译：已经报道了超细晶粒的Mn_3（Cu_（1-x）Ge_x）N复合体的先进负热膨胀（NTE）性能。与以前的研究相比，开发的制备路线将制造时间减少了十倍以上。与粗粒化合物块相比，超细Mn_3（Cu_（1-x）Ge_x）N（x = 0.5）块的NTE起始温度降低到250 K，负热膨胀系数（CNTE）达到-23.7 x 10〜（-6）K〜（-1），显着提高。已发现起始氮化锰中的氮含量也对NTE起始温度，操作温度范围和CNTE具有显着影响。

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