Polycrystalline X-ray diffractometer, also known as powder diffractometer, is usually used to measure powder, polycrystalline metal or polymer bulk materials.

The full name of XRD is X-ray diffraction, which uses the diffraction phenomenon of X-ray in the crystal to obtain the X-ray signal characteristics after diffraction, and gets the diffraction pattern after processing.

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Petrological studies often require the identification of mineral compositions in rocks, especially those that are less abundant. Therefore, the qualitative analysis of minerals is the most important application of X-ray diffraction in the study of mineral petrology.

Polymers are commonly synthesized as fibers, sheets, and other solid forms. Its properties are greatly affected by its structural parameters such as crystallinity, crystal structure and orientation, and can be studied using XRD

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An X-ray diffractometer is an instrument used to measure residual stress inside a material. By analyzing the X-ray diffraction pattern of the material, the residual stress distribution inside the material is calculated.

Asbestos, also known as "asbestos", refers to silicate mineral products with high tensile strength, high flexibility, resistance to chemical and thermal erosion, electrical insulation and spinnability. The three most common types are chrysotile, iron and cyanite.

X-ray diffractometer is a device that uses the principle of interaction between X-rays and substances to obtain information such as crystal structure and lattice constant of substances by measuring the diffraction Angle and intensity of X-rays in substances.

Cement is a common building supplies, generally divided into ordinary Portland cement, Portland cement mixed materials and special cement, the use of Portland cement is more.

This paper mainly analyzes the cause of a black spot phenomenon on the negative surface of lithium iron phosphate battery.