实验条件对X射线衍射物相定量分析结果的影响

Effect of Experimental Conditions on X-ray Diffractometric Quantitative Phase Analysis

通过实验验证了多物相试样X射线衍射定量分析的基体效应,着重研究了参比强度K值、衍射强度、混合物各物相粒度、X射线管功率等实验条件对物相定量分析结果的影响。结果表明,物相定性分析是定量分析的前提,采用积分强度、使各物相颗粒尽可能细而且均匀、采用较高的X射线管功率以及适合的扫描速率均有利于提高物相X射线衍射定量分析的准确度。

The matrix effect on X-ray diffractometric quantitative multi-phase analysis was studied through experiments. Influential factors such as K value （I/Iv） , diffraction signal intensity, sample particle size for all phases and power of X-ray tube used were emphasized. The results showed that qualitative analysis was the prerequisite of quantitative analysis. Some measures, including using integral intensities, making sample particle size as fine and homogeneous as possible in all phases, using X-ray tube power and suitable scanning speed, were taken and the accuracy of quantitative X-ray diffraction phase phase analysis was remarkably improved.