论文部分内容阅读
一、引言在物相的X射线衍射定量分析中,由于择优取向,微吸收,消光等诸因素的影响,致使测量强度与理论计算强度之间存在着很大的偏离,从而引起误差;这是X射线物相定量分析中需要特别注意的,又是困难的问题。本文着重讨论择优取向对定量相分析中衍射强度的影响及其消除方法。二、基本原理消除择优取向对定量相分析影响的方法,大致分为两类:一是着眼于试样制备;二是对测得的衍射强度进行校正。为消除晶体择优取向造成的影响,Hiltz等曾将试样制成五面柱体,每一面测量三对衍射线,求取试样六个面、18组线对所测的平均值,作为该相的含量。该方法表明在
I. Introduction X-ray diffraction quantitative analysis of the phase, due to the preferred orientation, micro-absorption, extinction and other factors, resulting in the measured intensity and the theoretical calculation of intensity there is a big deviation, which led to error; This is X-ray phase quantitative analysis requires special attention, but also difficult problem. This article focuses on the influence of selective orientation on the diffraction intensity in quantitative phase analysis and its elimination. Second, the basic principles Elimination of preferential orientation on the quantitative phase analysis of the methods, can be divided into two categories: First, focus on sample preparation; the second is the measured diffraction intensity correction. In order to eliminate the influence of the crystal orientation, Hiltz et al. Have made the sample into a pentagonal column with three pairs of diffraction lines measured on each side, and obtained the average of the measured values of six lines and 18 lines of the sample Phase content. The method shows in