The Effect of the Flux B203 and the Role of Ion RE3* in CaAI204: Eu2+, Nd3+, RE3+ Phosphor (RE: Dy, Gd, Tb).pdfVIP

The Effect of the Flux B203 and the Role of Ion RE3* in CaAI204: Eu2+, Nd3+, RE3+ Phosphor (RE: Dy, Gd, Tb).pdf

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The Effect of the Flux B203 and the Role of Ion RE3* in CaAI204: Eu2+, Nd3+, RE3+ Phosphor (RE: Dy, Gd, Tb)

JournalofMaterialsScienceandEngineeringB3(6)(2013)359-363 a LI暑 H IN 磊 TheEffectoftheFluxB2O3andtheRoleofIonRE3+in CaAI2O4:Eu ,Nd ,RE3+Phosphor(RE:Dy,Gd,Tb) NguyenNgocTrac1一 NguyenManhSon,PhanTienDung andPham NguyenThuyTrang1 , 』.DepartmentofPhysics,UniversityofSciences,HueUniversity,HueCiyt,Vietnam 2.~emamAcademyofScienceandTechnology,CauGiayDistrict,Hanoi,Vietnam 3FundamentalofScienceDepartment,HueIndustrialCollege,HueCiyt,Vietnam. Received:December12,2012/Accepted:January08,2013/Published:June25,2013 Abstract:ThelongafterglowphosphorsCaml204.Eu ,Nd”,RE (ER :Dy,Gd,Tb)werepreparedbythecombustionmethodat 580。Cfor5min.Inthismethod,theB2O3oxidewasusedasflux.TheinfluencesofthefluxBzO3quantityandtheroleofionER ” (ER :Dy,Gd,Tb)inthephosphorCaAI2O4:Eu ,Nd”werestudiedsystemically.TheX-raydiffractionpattern,scanningelectron microscopygraphic,thephotoluminescencespectrana ddecaytimewerepresented.Theemissionspectraofphosphorshadabroad bandwithmaximumat444nmduetoelectronrtansitionfromthe4f65dtothe4CofionEu .ItisshowedthatNd”andER ”ions generatedtrapsthatresultedinthelongpersistentphosphorescence.Simultaneously,whentheconcentrationofER ,十ionwashigh, theygeneratedalsoemissioncentersinthephosphor. Keywords:Longafterglow,phosphorescence,aluminate,combustionmethod. 1.Introduction ionvacanciesandpossiblyalsotheauxiliaryRE ion codopants7【,8】.ItisshowedthatNd计andER ions In recentyears,rare earth doped alkaline earth generated thehole trapsthatresulted in the long aluminatephosphorshavebeen extensively studied persistentph0sphOrescence. andused inmany ofapplications,such asradiation

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