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X-ray absorption spectroscopy is a spectral technique to analyze the elemental composition and electronic states of materials by using the signal changes before and after the incident of synchrotron radiation X-rays.
Synchrotron radiation is the electromagnetic radiation produced along the tangent direction of the orbit when the electron is moving in high-speed curve, which can be used to carry out many advanced scientific and technological research.
At present, XAFS has been applied in many fields, especially in the field of catalysis and battery materials research, and has become an important accurate characterization method.
When graphite materials are used as negative electrode materials for lithium batteries, one of the necessary conditions for the degree of graphitization.
In 1912, Laue et al. predicted by theory and confirmed by experiment that diffraction can occur when X-ray meets crystal, proving that X-ray has the property of electromagnetic wave, which became the first milestone in X-ray diffraction.
XAFS, as an advanced characterization technique for the local structure analysis of materials, can provide more accurate atomic structure coordination information in the short-range structure range than X-ray crystal diffraction.
X-ray diffraction is a commonly used non-destructive analytical technique that can be used to reveal the crystal structure, chemical composition, and physical properties of substances.
X-ray diffraction, through the X-ray diffraction of a material, the analysis of its diffraction pattern, to obtain the composition of the material, the structure or shape of the atoms or molecules inside the material and other research means.
According to the position and intensity changes of in-situ XRD diffraction peaks, the intermediates generated during the cycle can be inferred, and the reaction mechanism can be further derived from these intermediates.
X-ray diffraction runs through every stage of drug quality control, such as the study of raw materials and preparations.
Residual stress has a great impact on the dimensional stability, stress corrosion resistance, fatigue strength, phase change and other properties of materials and components. Its measurement has been widely concerned by academia and industry.