Crystal Structure And Physical Properties Analysis Of （Bi₂O₃）_1-x（Sc₂O₃）_x（x= 0.01，0.03, 0.05）

The（Bi₂O₃）_1-x（Sc₂O₃）_x（x=0,0.01,0.03,0.05）powder crystals were prepared by solid-phase sintering.X-ray diffraction experiments were performed on several samples at room temperature,and the RIETAN-2000 program was used.The Rietveld analytical method and the VEND,PRIMA and VICS programs in the study respectively studied the crystal structure,iso-high electron density（2D and 3D）,atomic coordination number and atomic thermal vibration isotropy factor B of several samples,using synchronous heat The analyzer studied the thermal stability of several samples.First,weigh 10g of（Bi₂O₃）_1-x（Sc₂O₃）_x（x=0,0.01,0.03,0.05）powder crystals according to the molar mass ratio,Prepare（Bi₂O₃）_1-x（Sc₂O₃）_x（x=0,0.01,0.03,0.05）powder crystals using a common box-type high-temperature furnace and perform X-ray diffraction experiments on them and obtain their respective X-ray diffraction patterns.The crystal structure of the powder crystal is refined through the Rietveld module in the RIETAN-2000program,so that the lattice constant of the powder crystal used,the isotropic temperature factor B produced when atomic heat vibrates,the coordination number of atoms,and the distance between atoms can be obtained.parameter.Using MEM（Maximum Entropy Method）analysis method to analyze（Bi₂O₃）_1-x（Sc₂O₃）_xpowder crystals,the contour electron density distribution map of the sample can be obtained,and the contour electron density is three-dimensional（3D）and plane（2D）The visualization becomes a reality.Secondly,using a synchronous thermal analyzer to conduct thermal analysis experiments on the prepared samples,the DSC and TG curves of each sample were obtained and their thermal stability was analyzed.