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为了解释Ni的线热膨胀系数随温度变化的复杂关系,本文首先对Pauling的键距公式作出磁性电子作用的修正,进而导出了Ni的线热膨胀系数的关系式,式中包括两项:正常线热膨胀系数α_n,磁性转变线热膨胀系数α_m。并介绍了α_m的计算方法,不仅计算值与实验值相当吻合,而且定量地揭示了Ni中磁性电子具有弱的共价电子的行为。随着温度升高,磁性电子的键合作用减弱,以至最后消失。
In order to explain the complex relationship between Ni linear thermal expansion coefficient and temperature, this paper first amended the Pauling’s key-sphere formula to calculate the magnetic electron effect, then deduced the relationship between Ni linear thermal expansion coefficient, which includes two items: normal line thermal expansion Coefficient α_n, coefficient of thermal expansion of the magnetically transformed wire α_m. The calculation method of α_m is introduced. The calculated values are in good agreement with the experimental values, and quantitatively reveal the behavior of magnetic electrons with weak covalent electrons in Ni. As the temperature increases, the bonding of the magnetic electrons weakens and eventually disappears.