Giant negative thermal expansion (NTE), over a = -30 x 10~(-6) K~(-1) (a: coefficient of linear thermal expansion), at room temperature can be achieved in Mn_3ZnN-based antiperovskite manganese nitrides by simultaneous substitution of C and B for N as well as Sn for Zn. The developed NTE nitrides show larger negative a, although the width of the operating-temperature window is comparable to that of Mn_3CuN-based materials developed to date. Such a large, isotropic, and high-stiffness NTE material can compensate for the large positive thermal expansion of, for example, even aluminum or plastic materials.
展开▼
机译:巨大的负热膨胀(NTE),超过A = -30×10〜(-6)K〜(-1)(A:线性热膨胀系数),在室温下可以在基于Mn_3znn的抗哌莫氏锰锰氮化物中实现同时取代C和B对于N以及SN for Zn。发育的NTE氮化物显示出更大的负A,尽管操作温度窗口的宽度与迄今为止开发的基于MN_3CUN的材料的宽度相当。这种大,各向同性和高刚度的NTE材料可以补偿例如甚至铝或塑料材料的大的正热膨胀。
展开▼