Orange long-afterglow fluorescent powder and preparation method thereof
A long-lasting phosphor and orange-yellow technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems that the luminous brightness and afterglow time do not meet the practical requirements, the preparation process is not easy to control, pollute the environment, etc., and the preparation method is simple , Low cost of raw materials, wide excitation spectrum
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[0017] Example 1
[0018] Prepare Sr 2.9985 Al 2 O 5 Cl 2 :Eu 2+ 0.0005 , Dy 3+ 0.0010 (Ie when Sr 3-x-y-z M z Al 2 O 5 Cl 2 :Eu 2+ x , Dy 3+ y In z=0, x=0.005, y=0.010) phosphor.
[0019] SrCO is weighed according to the stoichiometric ratio 3 1.4014 g, SrCl 2 .6H 2 O1.4664 g (due to SrCl 2 .6H 2 O has a low melting point (873℃) and is volatile, and the calculated amount exceeds 10%), Al 2 O 3 0.5100 g, Eu 2 O 3 0.0004g, Dy 2 O 3 0.0009g, mixed and ground in an agate mortar; placed in a corundum crucible with a cover, placed in a high temperature furnace, in CO or H 2 In a reducing atmosphere, calcined at 1200~1350℃ for 3~5 hours, naturally cooled and ground to obtain orange long afterglow phosphor Sr 2.9985 Al 2 O 5 Cl 2 :Eu 2+ 0.0005 , Dy 3+ 0.0010 .
Example Embodiment
[0020] Example 2
[0021] Prepare Sr 2.997 Al 2 O 5 Cl 2 :Eu 2+ 0.001 , Dy 3+ 0.002 (Ie when Sr 3-x-y-z M z Al 2 O 5 Cl 2 :Eu 2+ x , Dy 3+ y In the case of z=0, x=0.001, y=0.002).
[0022] SrCO is weighed according to the stoichiometric ratio 3 1.4003 g, SrCl 2 .6H 2 O 1.4664 g (due to SrCl 2 .6H 2 O has a low melting point (873℃) and is volatile, and the calculated amount exceeds 10%), Al 2 O 3 0.5100 g, Eu 2 O 3 0.0009 g, Dy 2 O 3 0.0019g, mixed and ground in an agate mortar; placed in a corundum crucible and covered, placed in a high-temperature furnace, in CO or H 2 In a reducing atmosphere, calcined at 1200~1350℃ for 3~5 hours, naturally cooled and ground to obtain orange long afterglow phosphor Sr 2.997 Al 2 O 5 Cl 2 :Eu 2+ 0.001 , Dy 3+ 0.002 .
Example Embodiment
[0023] Example 3
[0024] Prepare Sr 2.97 Al 2 O 5 Cl 2 :Eu 2+ 0.01 , Dy 3+ 0.02 (Ie when Sr 3-x-y-z M z Al 2 O 5 Cl 2 :Eu 2+ x , Dy 3+ y Where z=0, x=0.01, y=0.02).
[0025] SrCO is weighed according to the stoichiometric ratio 3 1.3803 g, SrCl 2 .6H 2 O1.4664 g (due to SrCl 2 .6H 2 O has a low melting point (873℃) and is volatile, and the calculated amount exceeds 10%), Al 2 O 3 0.5100 g, Eu 2 O 3 0.0088 g, Dy 2 O 3 0.0187 g, mixed and ground in an agate mortar; placed in a corundum crucible and covered, placed in a high-temperature furnace, in a CO or H2 reducing atmosphere, at a temperature of 1200 ~ 1350 ℃ for 3 ~ 5 hours; after natural cooling Grind to obtain orange long afterglow phosphor Sr 2.97 Al 2 O 5 Cl 2 :Eu 2+ 0.01 , Dy 3+ 0.02 .
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