Phase analysis includes qualitative analysis and quantitative analysis. Phase analysis is the most widely used direction of X-ray diffraction in material analysis, and it is one of the preliminary analysis work of material research. Below we briefly list several aspects of its main applications: 2.1 Phase Analysis X-ray diffraction technology has become the most basic and important material structure characterization method, and its application range is also very broad, covering various fields such as physics, chemistry, geology, life science, engineering and materials. 2 Different Crystals with Different Diffraction Patterns 2. Therefore, different crystals have different diffraction patterns, shown as figure as follows:įig. * The distribution law of diffraction lines in space Īmong them, the distribution law of diffraction lines is determined by the size, shape and orientation of the unit cell, and the intensity of diffraction lines depends on the species of atoms and their positions in the unit cell. Crystal structure has a significant impact on the orientation and intensity of X-ray diffraction in spatial distribution.Īccording to its principle, the most important characteristics of the diffraction pattern of a crystal are: Interference will generate strong X-ray diffraction in special directions. Therefore, different atomic scattering X-ray will interact. The basic principle of X-ray diffraction is that when introducing a beam of monochromatic X-rays on a crystal composed of a unit cell with atoms regularly arranged, the distance between the atoms and the wavelength of the incident X-ray are in the same order of magnitude. 1 Structure of X-ray Diffractometers and Goniometers 1. Below is the structure of X-ray diffractometers and goniometers:įig. Therefore, X-ray diffraction analysis, as a modern scientific method of material structure and composition analysis, has gradually been widely used in research and production of various disciplines. The X-ray diffraction method has the advantages of no damage to the sample, no pollution, rapidity, high measurement accuracy, and a large amount of information about the crystal integrity can be obtained. determine the unique diffraction pattern of the substance. Substance composition, crystal form, intermolecular bonding mode, molecular configuration, conformation, etc. When a substance (crystalline or amorphous) is subjected to diffraction analysis, the substance is irradiated by X-rays to produce different degrees of diffraction. XRD analysis is the main method to study the phase and crystal structure of substances. So what is XRD? XRD technology is a research method to obtain information such as the composition of the material, the structure or morphology of the atoms or molecules in the material by analyzing the diffraction pattern of the material by X-ray diffraction. We can offer semiconductor wafers with X-ray diffraction (XRD) diagram.
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