Preparation Of Zn²⁺,Mn²⁺ Doped NaAlSiO₄ Glass Ceramics And Study On Luminescence Properties

This paper selects SiO₂-Al₂O₃-Na₂O-Er₂O₃-Yb₂O₃ basic glass as the research object,using differential scanning calorimeter（DSC）,Fourier infrared absorption spectrometer（FTIR）,X-ray diffractometer（XRD）,scanning electron microscope（SEM）and Ultraviolet-visible spectrophotometer and other test methods study the influence of basic glass doped ZnO and MnO on the crystallization temperature,structure and optical properties of glass.The main findings are:The Zn²⁺-doped aluminosilicate matrix glass was prepared by the traditional high-temperature melting method.After the matrix glass was subjected to crystallization heat treatment,NaAlSiO₄:Er,Yb crystals were successfully precipitated in the sample.XRD,SEM,FTIR,absorption spectra and excitation spectra under 980nm pumping were used to analyze the up-conversion luminescence performance of the samples.The study found that the red light emission intensity at 4 mol%is 1.75 times that of 2 mol%doping.This is because Zn²⁺breaks the internal symmetry of the crystal,increases the defect concentration,and changes the coordination environment of rare earth ions,thereby increasing the intensity of red light emission.The Mn²⁺-doped aluminosilicate matrix glass was prepared by the traditional high-temperature melting method,and the matrix glass was subjected to crystallization heat treatment,and NaAlSiO₄:Er,Yb crystals were successfully precipitated from the sample.XRD,SEM,FTIR,absorption spectra and excitation spectra under 980nm pumping were used to analyze the up-conversion luminescence performance of the samples.Under the excitation of 980nm laser pump,the generation of the intermediate valence state of Mn²⁺（³d₄）breaks the symmetry of the crystal,distorts the internal lattice of the crystal,and improves the up-conversion luminous intensity.It is proved that the green light and red light in the sample are both the two-photon up-conversion luminescence process.The Mn²⁺-Zn²⁺-doped aluminosilicate matrix glass was prepared by the traditional high-temperature melting method,and the matrix glass was subjected to crystallization heat treatment.The Mn-Zn double-doped NaAlSiO₄:Er,Yb crystals were successfully precipitated in the sample.XRD,SEM,FTIR,absorption spectra and excitation spectra under 980nm pumping were used to analyze the up-conversion luminescence performance of the samples.Fixing the Zn²⁺concentration unchanged,gradually increasing the Mn²⁺concentration,the luminous intensity increases.Because the radius of Mn²⁺is similar to that of rare earth ions,the crystal lattice shrinks and the distance between Er³⁺-Er³⁺in the crystal becomes shorter,which increases the probability of non-radiative transition and increases the upconversion luminescence intensity in the sample.