Determination Of Element Content In Magnetoplumbite Ferrite By EDXRF

Ferrite Ba_0.1Pb_0.9Fe₁₂O₁₉ with magnetoplumbite structure is a kind of new nonmetallic magnetic materials which have special hexagonal crystal structure and some advantages such as stable magnetic thermal performance, high saturation magnetization and magnetic anisotropy and so on. So it’s popular in the field of microwave absorption materials, microwave and millimeter wave materials and high density magnetic recording materials. However, the non stoichiometric ratio of ferrite which can improve the crystal microstructure and magnetic properties is widespread in the process of industrial preparation. Therefore, determining the content of Fe, Ba and Pb in Ba_0.1Pb_0.9Fe₁₂O₁₉ accurately and quickly has an important guiding significance in the research of magnetic properties and industrial production.In this paper, the non-destructive analysis, determining Fe, Ba and Pb content in Ba_0.1Pb_0.9Fe₁₂O₁₉ by energy dispersive X-ray fluorescence（EDXRF） spectroscopy, was introduced.Firstly, the theoretical foundation of X-ray fluorescence analysis technology is elaborated and the structure and working principle of EDXRF spectrometer is introduced at the same time.Secondly, the energy calibration curve which is used to complete element identification of ferrite, was drawn by Ni48Mn41Sn11 alloy sample according to the theory of qualitative analysis. In order to improve the accuracy of measurement results, the best excitation condition of Ba was used as the measuring conditions of determining samples which were optimized.Finally, the calibration curve of Pb and Ba relative to Fe between the content ratio and intensity ratio of characteristic X-ray used to complete the quantitative analysis ofBa_0.1Pb_0.9Fe₁₂O₁₉, was established by powder pellet method. The results of determining samples of known content reveal that this method can meet the requirements of measuring the contents of Ba_0.1Pb_0.9Fe₁₂O₁₉ ferrite.The content of Fe, Pb and Ba in Ba_0.1Pb_0.9Fe₁₂O₁₉ sample was measured in the experiment to be determined as 56.993%, 15.958% and 1.169% respectively, and the relative standard deviation of each element was less than 1.87%. Compared with the results of the results of chemical analysis, the relative error of Fe, Ba and Pb was less than 1.70%. This method can complete the determination of the Ba_0.1Pb_0.9Fe₁₂O₁₉ material accurately and quickly to improve the efficiency of analysis. It is of great significance in the industrial production of new magnetic materials.