Analysis of Key Points of Laboratory Tests on Classification of Graphite Products
The study combed the classification of graphite according to Import and Export Tariff of the People's Republic of China(2023)and the characteristics of graphite products.A comprehensive characterization technique of X-ray fluorescence spectroscopy,X-ray diffraction,and ultra-depth-of-field microscopy was used to establish a classification test method for graphite products.The main phase of artificial graphite is 2H phase,while the main phase of natural graphite and its processed products are 2H and 3R phases,which can be identified by X-ray diffraction.Natural graphite generally has squama texture,while spherical graphite has ellipsoidal texture,which can be identified through ultra-depth-of-field microscopic analysis.Expandable graphite generally has characteristics such as high sulfur content,decreased crystallinity,and wrinkles on the surface,which requires comprehensive judgment.
graphitelaboratory tests on commodity classificationX-ray fluorescence spectrumX-ray diffractionultra-depth-of-field microscopic analysis
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