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Posted on:2002-02-27Degree:MasterType:Thesis
Country:ChinaCandidate:J X DuFull Text:PDF
GTID:2121360032956106Subject:Materials science
Abstract/Summary:PDF Full Text Request
Since the new long persistent phosphorescence SrA12Q4:Eu2+,Dy3t phosphor was invented in the 1990s,it takes the place of the conventional long persistent phosphorescence ZnS:Cu2~ phosphor, and it is followed with interest at home and abroad. But for the practical application in the field of ceramics, it hasn抰 been studied by now. This paper prepares a novel photoluminescence material by sintering the mixture of SrAl2O4:Eu2~,Dy3~ phosphor and low softening temperature transparent glass frits by appropriate proportion onto ceramic surface. It has not only the characteristics of high brightness, long persistent phosphorescence and no radioactivity, but also excellent physical-chemical properties, such as, the resistance to high temperature, abrasion, scratching, combustion, high hardness and chemical stability.This paper systematically studies the effect of low softening temperature transparent glass frits composition on phosphorescence properties of photoluminescence glaze; discusses the effect of temperature, impurity, sintering time and water on the properties of SrAl2O4:Eu2~,Dy3~ phosphor; discusses the effect of phosphor concentration, sintering temperature, sintering process and organic vehicle on phosphorescence properties of photoluminescence glaze and glaze surface quality; also simply investigates the long phosphorescence of SrAl2O4:Eu2~,Dy3~ p ho S p ho r.XRD, SEM, Surface Luminescence Meter, Spectrophotometer indicate that the photoluminescence glaze obtained maintains thephosphorescence properties of SrAl2O4:Eu2~,Dy3~ phosphor, it exhibits broad band emission spectra peaking at 520nm,the persistence time last 12 hours. The special glaze composition and sintering process attained is suitable to the production of photoluminescence glaze.
Keywords/Search Tags:SrAL2O4:Eu2+, Dy3, CeramicsLong persistent phosphorescence Photoluminescence glaze
PDF Full Text Request
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