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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 383-385 
    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
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