Preparation And Optical Storage Mechanism Study Of Electron Trapping Material Eu²⁺, Sm³⁺Doped12CaO·7Al₂O₃

As the speed development of information technology, the traditional storage technologyhas been unable to meet the demand of information storage. memory has many advantagessuch as high storage density, high data transmission rate, long storage life and low bits ofinformation price. These attract the attention of researchers. Electron trapping material withcycle life has caused the attention of people.12CaO·7Al₂O₃（C12A7）has a wide belt and good thermal stability, crystal symmetry islow, It is advantageous to enhance the rare earth luminescence.This article through chemical precipitation method prepare Eu²⁺and Sm³⁺doped C12A7power. Through the test and analysis of X Ray Diffraction（XRD）,the sample powder onstructure characterization and test sample fluorescence spectra, decay curve, analysis theoptical properties. Through sample of thermoluminescence and optical excitationcharacteristice of sample storage mechanism to undertake the tthorough researchment.With contrasted the standard C12A7XRD spectral, demonstrated that experimentallyobtained with obtained with cage cavity phase structure of12CaO·7Al₂O₃: Eu²⁺,Sm³⁺powersample, Eu²⁺and Sm³⁺has been incorporated into the crystal, and is replaced by a crystal ofCa ions in cell.12CaO·7Al₂O₃: Eu²⁺,Sm³⁺power sample are effective excitation wavelength is325nm,then under UV light excitation, emission spectra in443nm appeared in a widebandpeak. Mainly from the Eu²⁺classic4f65d1-4f7emission. The Eu²⁺the5D track by crystalfield environment is very serious, coupled with the substrade lattice vibration will enable the4f65d1hybrid system to be no longer separated alse showed the broadband characteristics.Through the analysis of the test of12CaO·7Al₂O₃: Eu²⁺,Sm³⁺power sample afterglowproperties and thermoluminescence curve.It was not observed in better afterglow, heat releasecurve is higher than that of450K at high temperature, the luminous intensity increasegradually, Sm³⁺prodes deep trap,has good optical storage properties.By testing the12CaO·7Al₂O₃: Eu²⁺,Sm³⁺power sample of980nm infrared excitationlight excitation decay curve, drawsthe sample has good optical excitation characteristic,a fulldescription of the sample has good storage properties. From the980nm incentive and808nminfrared photostimulated luminescence curve can be seen that808nm excitation curvesobtained with luminous intensity is stronger than980nm excitation curve. Finally we haveresearched the sample storage mechanism.The experimental result show that the12CaO·7Al₂O₃: Eu²⁺,Sm³⁺is expected to become astorage material with high storage density, the quality of reading the information fast, stablestorage, and information erasable.