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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

Inactive Publication Date: 2010-09-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned long-wave emission long afterglow phosphors are easy to oxidize and hydrolyze sulfur-containing compounds, the preparation process is not easy to control and generate sulfur-containing harmful gases, polluting the environment, Pr-activated titanate, Mn-activated phosphate, Eu-activated aluminate , luminous brightness and afterglow time have not yet reached the practical requirements

Method used

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  • Orange long-afterglow fluorescent powder and preparation method thereof
  • Orange long-afterglow fluorescent powder and preparation method thereof
  • Orange long-afterglow fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Sr 2.9985 al 2 o 5 Cl 2 :Eu 2+ 0.0005 , Dy 3+ 0.0010 (i.e. when Sr 3-x-y-z m z al 2 o 5 Cl 2 :Eu 2+ x , Dy 3+ y When z=0, x=0.0005, y=0.0010) phosphor powder.

[0019] Weigh SrCO according to stoichiometric ratio 3 1.4014 g, SrCl 2 .6H 2 O1.4664 grams (due to SrCl 2 .6H 2 O has a low melting point (873°C) and is volatile, and the calculated excess is 10%), Al 2 o 3 0.5100 g, Eu 2 o 3 0.0004 g, Dy 2 o 3 0.0009 g, mixed and ground in an agate mortar; put into a corundum crucible with a cover, placed in a high temperature furnace, under CO or H 2 Under reducing atmosphere, burn at 1200-1350°C for 3-5 hours, cool naturally and then grind to obtain orange-yellow long-lasting phosphor Sr 2.9985 al 2 o 5 Cl 2 :Eu 2+ 0.0005 , Dy 3+ 0.0010 .

Embodiment 2

[0021] Preparation of Sr 2.997 al 2 o 5 Cl 2 :Eu 2+ 0.001 , Dy 3+ 0.002 (i.e. when Sr 3-x-y-z m z al 2 o 5 Cl 2:Eu 2+ x , Dy 3+ y When z=0, x=0.001, y=0.002) phosphor powder.

[0022] Weigh SrCO according to 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°C) and is volatile, and the calculated excess is 10%), Al 2 o 3 0.5100 g, Eu 2 o 3 0.0009 g, Dy 2 o 3 0.0019 g, mixed and ground in an agate mortar; put into a corundum crucible with a cover, placed in a high temperature furnace, under CO or H 2 Under reducing atmosphere, burn at 1200-1350°C for 3-5 hours, cool naturally and then grind to obtain orange-yellow long-lasting phosphor Sr 2.997 al 2 o 5 Cl 2 :Eu 2+ 0.001 , Dy 3+ 0.002 .

Embodiment 3

[0024] Preparation of Sr 2.97 al 2 o 5 Cl 2 :Eu 2+ 0.01 , Dy 3+ 0.02 (i.e. when Sr 3-x-y-z m z al 2 o 5 Cl 2 :Eu 2+ x , Dy 3+ y When z=0, x=0.01, y=0.02) phosphor powder.

[0025] Weigh SrCO according to stoichiometric ratio 3 1.3803 g, SrCl 2 .6H 2 O1.4664 grams (due to SrCl 2 .6H 2 O has a low melting point (873°C) and is volatile, and the calculated excess is 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; put it into a corundum crucible, cover it, place it in a high-temperature furnace, and burn it at 1200-1350°C for 3-5 hours in a reducing atmosphere of CO or H2; after natural cooling Grind to get 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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Abstract

The invention relates to orange long-afterglow fluorescent powder and a preparation method thereof. The chemical formula of the fluorescent powder is Sr3-x-y-zMzAl2O5Cl2: Eu2+x, Dy3+y, wherein M is one or two of Ba, Ca and Mg; x, y and z are molar fractions; x is more than 0.0001 and less than or equal to 0.10; y is more than or equal to 0.0002 and less than or equal to 0.20; and z is more than or equal to 0 and less than or equal to 0.30. The preparation method comprises the following steps of: selecting oxide, hydroxide or corresponding salt in the structural formula as raw materials, mixing and grinding the raw materials, roasting the mixture for 2 to 5 hours at the temperature of between 1,200 and 1,350 DEG C under the reducing atmosphere of CO or H2, and naturally cooling and grinding the roasted product to obtain the orange long-afterglow fluorescent powder. After an excitation source is removed under the excitation of wavelength of 300 to 420 nanometers, the fluorescent powder has remarkable orange long-afterglow property, and human eyes can observe the orange long afterglow for over 1 hour in a darkroom. The orange long-afterglow fluorescent powder can be used for display marks or cautions at special places such as dark environment and the like. The long-afterglow fluorescent powder has the advantages of stable performance, low raw material cost, no pollution and simple preparation.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to an orange-yellow long-lasting phosphor and a preparation method thereof. Background technique [0002] Traditional long-lasting fluorescent materials are mainly zinc sulfide series. Since 1991, Song Qingmei of Fudan University and others reported SrAl 2 o 4 :Eu 2+ , H 3 BO 3 After the long-lasting and high-brightness long-lasting fluorescence phenomenon in the system, the long-lasting fluorescent materials have also attracted more and more attention from researchers along with various new applications. Existing commercial long-lasting materials are mainly based on aluminates and silicates activated by rare earths, but the color of long-lasting luminescent materials is generally blue (such as SrAl 2 o 4 :Eu 2+ ,Nd 3+ , 440nm; Sr 2 MgSiO 7 :Eu, 468nm), blue-green light (Sr 4 al 14 o 25 :Eu, Dy, 490nm), yellow-green light (SrAl 2 o 4 :Eu 2+ , Dy 3+ , 520...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 张霞张家骅郝振东
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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