X-ray is so useful that electron microscope can not only observe the microstructure of samples, but also analyze the crystal structure of micro-regions with high resolution transmission electron microscope, and the spatial resolution can reach 0. 1nm.

X-ray diffraction technology has been widely used in materials science (including inorganic, organic, metal, single crystal and so on). ), life science and characterization of polymer structure and properties can be summarized as follows:

(1) polycrystalline structure;

(2) Accurate determination of cell parameters;

(3) phase analysis;

(4) Determination of phase diagram;

(5) Determination of macroscopic internal stress of crystal;

(6) Determination of particle size;

(7) Structure of polymer;

(8)X-ray diffraction imaging to study the integrity and defects of single crystals;