A study of the amplitude of vibration of carbon atoms in the graphite structure
A study of the amplitude of vibration of carbon atoms in the graphite structure
复制标题
石墨结构中碳原子振动幅度的研究
DOI：
10.1016/0008-6223(64)90058-2
复制
发表时间：
1964
期刊：
影响因子：
10.9
通讯作者：
B. Richards
中科院分区：
文献类型：
--
作者：
E. A. Kellett;B. P. Jackets;B. Richards
利用最初用于热膨胀研究的高温装置，用X射线计数器衍射仪测量了石墨样品的0004和0006反射积分强度随温度的变化。研究了三种石墨，一种光谱材料p≅0·2，一种p≅0·1热解碳和一种热解碳≅0·8。由强度测量得到了碳原子垂直于层平面的振动幅值，并假定室温为0.099ä。给出了结果的表格和图形表示。结果表明，在所考虑的温度范围内，所有样品的振动幅度都随着温度的升高而不断增大，在高温下，振幅的增大几乎与层间距的增大一样快，因此层间的平均“自由空间”随温度的升高而减小。石墨结构中原子运动受阻的程度是堆积无序的函数，而不是石墨的择优取向程度的函数。
The changes with temperature in the integrated intensity of the 0004 and 0006 reflections from graphite specimens have been measured by means of an X-ray counter diffractometer, using a high temperature attachment developed originally for thermal expansion studies. Three varieties of graphite were examined, a spectroscopic materialp≅0·2, a pyrolytic carbon ofp≅0·1 and a pyrolytic carbonp≅0·8. The range of temperature between 1200 and 2500°C was covered. Values of the amplitude of vibration of carbon atoms normal to the layer planes were derived from the intensity measurements and a room temperature value of 0·099 Å was assumed. Tables and graphical representations of the results are presented. It is shown that the amplitude of vibration increases continuously with temperature for all the samples in the temperature range considered and at elevated temperatures the amplitude increases nearly as rapidly as the interlayer spacing; hence the mean “free space” between the layer planes decreases as temperature increases. The degree to which atomic movement is hindered in the graphite structure is a function of stacking disorder and not of the degree of preferred orientation of the graphite.