ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A new method for preparing long afterglow phosphor and properties had been studied in thepaper. In the new process the activated Al-Sr alloy powder hydrolyzes in pure water. The hydrolysatescontain the mixture of Sr(OH)2.8H2O and Al(OH)3 in main, included a little Al(OH)3, AlOOH, SrCO3,and 3SrO.Al2O3. 6H2O. After heat treatment at 700°C for 1 hour, the mixture of SrO and α-Al2O3, γ-Al2O3were formed. As a precursor, the hydrolysates after heat treatment had been used to prepare long afterphosphor Eu, Dy co-doped SrAl2O4. The crystal structure of hydrolysates and Eu, Dy co-doped SrAl2O4was analyzed by XRD. The luminescent properties of long afterglow material were studied. The Resultsshowed the emission spectra of Eu and Dy co-doped SrAl2O4 lied near 520nm, resulted from the charactertransition of 4f5d-4f of Eu2+ ion. The method can improve afterglow properties dramatically. The initialluminescent intensity of long afterglow material reached 18cd/m2, and the duration time lasted 46 h
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.383.pdf
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