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一、前言分析X射线粉末衍射峰形和位置的变化,是研究多晶材料结构和性质的一项重要技术,以前已广泛应用于化学过程和产品的研究。线宽法是众所周知的测定晶粒大小的方法,但是除形状因子外,还有两个重要原因,使它只能得到近似的相对平均大小值。事实上,如果事先不进行峰形分析,线宽法本身难以区分细碎和微应力加宽;同时由于纯加宽峰形f(x),予先并不知道,因此选择仪器宽度校正方法,多少带有主观臆断。峰形解析法从原则上能够消除这两个缺点;应用Stokes方法,可以对峰形不加任何假设,
I. Preface The analysis of the change of peak shape and position of X-ray powder diffraction is an important technique to study the structure and properties of polycrystalline materials. It has been widely used in the research of chemical processes and products. The line width method is a well-known method for determining the grain size, but there are two important reasons besides the form factor, so that it can only get an approximate relative average size value. In fact, the linewidth method itself can not distinguish between fine crushing and micro-stress broadening without the prior peak shape analysis, and because the pure broadening of the peak shape f (x) is not known beforehand, the choice of the instrument width correction method With subjective assumptions. In principle, the peak shape analysis method can eliminate these two shortcomings. Applying the Stokes method, we can make no assumption about the peak shape,