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Sulfur-free red long-afterglow luminescent material, and its preparing method

A long-lasting luminescent, red technology, applied in the direction of luminescent materials, chemical instruments and methods, etc.

Inactive Publication Date: 2010-01-27
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lack of blue (such as SrAl 2 o 4 :Eu 2+ ,Nd 3+ , 440nm) green (such as SrAl 2 o 4 :Eu 2+ and SrAl 2 o 4 :Eu 2+ , Dy 3+ , 520nm) matching the ideal red emission (such as 650nm), which largely limits the practical application of long afterglow materials

Method used

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  • Sulfur-free red long-afterglow luminescent material, and its preparing method
  • Sulfur-free red long-afterglow luminescent material, and its preparing method

Examples

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Embodiment 1

[0011] Embodiment 1: Preparation of Eu x Sr 1-x O-zCr y al 2-y o 3 , where x=0.01, y=0.01, z=1, the specific expression is: Eu 0.01 Sr 1-0.01 O-Cr 0.01 al 2-0.01 o 3 . According to the expression Eu 0.01 Sr 1-0.01 O-Cr 0.01 al 2-0.01 o 3 Calculate and weigh raw materials, weigh 1.76g Eu 2 o 3 , 145.5 g SrCO 3 , 0.76g Cr 2 o 3 and 101.5g Al 2 o 3 , to mix them. After the above raw materials are fully ground and mixed, put them into a high-purity corundum crucible or a platinum crucible, and put them into a high-temperature furnace; heat them for 3-5 hours at a temperature of 1100°C-1400°C under carbon or hydrogen reduction conditions, and then take them out to obtain Sulfur-free red long-lasting luminescent material Eu 0.01 Sr 1-0.01 O-Cr 0.01 al 2-0.01 o 3 .

Embodiment 2

[0012] Embodiment 2: Preparation and preparation of Eu x Sr 1-x O-zCr y al 2-y o 3 , where x=0.05, y=0.01, z=1, the specific expression is: Eu 0.05 Sr 1-0.05 O-Cr 0.01 al 2-0.01 o 3 . According to the expression Eu 0.05 Sr 1-0.05 O-Cr 0.01 al 2-0.01 o 3 Calculate and weigh raw materials, weigh 8.8g Eu 2 o 3 , 139.7 g SrCO 3 , 0.76g Cr 2 o 3 and 101.5g Al 2 o 3 , to mix them. After the above raw materials are fully ground and mixed, put them into a high-purity corundum crucible or a platinum crucible, and put them into a high-temperature furnace; heat them for 3-5 hours at a temperature of 1100°C-1400°C under carbon or hydrogen reduction conditions, and then take them out to obtain Sulfur-free red long-lasting luminescent material Eu 0.05 Sr 1-0.05 O-Cr 0.01 al 2-0.01 o 3 .

Embodiment 3

[0013] Embodiment 3: Preparation of Eu x Sr 1-x O-zCr y al 2-y o 3 , where x=0.01, y=0.05, z=1, the specific expression is: Eu 0.01 Sr 1-0.01 O-Cr 0.05 al 2-0.05 o 3 . According to the expression Eu 0.01 Sr 1-0.01 O-Cr 0.05 al 2-0.05 o 3 Calculate and weigh raw materials, weigh 1.76g Eu 2 o 3 , 145.5 g SrCO 3 , 3.8g Cr 2 o 3 and 99.45g Al 2 o 3 , to mix them. After the above raw materials are fully ground and mixed, put them into a high-purity corundum crucible or a platinum crucible, and put them into a high-temperature furnace; heat them for 3-5 hours at a temperature of 1100°C-1400°C under carbon or hydrogen reduction conditions, and then take them out to obtain Sulfur-free red long-lasting luminescent material Eu 0.01 Sr 1-0.01 O-Cr 0.05 al 2-0.05 o 3 .

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Abstract

The invention relate to a red long afterglow emitting material and the manufacture method. The raw material includes Eu2O3, SrCO3, Cr2O3, and Al2O3. The manufacture method includes the following steps: grinding the raw material, putting into high purity corundum crucible or platinum crucible, putting into high-temperature furnace; under the condition of 1100-1400 degree centigrade and carbon or hydrogen deoxidization, heating 3-5 hours to gain product.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to a long afterglow luminescent material, in particular to a sulfur-free red long afterglow luminescent material and a preparation method. Background technique [0002] Due to a series of new developments and applications such as plasma flat display and quantum tailoring, traditional fluorescent materials have regained the attention of research and development institutions in various countries in recent years. SrAl has been reported since 1996 by Matsuzawa 2 o 4 :Eu 2+ , Dy 3+ After the long-lasting and high-brightness long afterglow fluorescence phenomenon in the system, the long afterglow fluorescent materials have been paid more and more attention by researchers along with various new applications. Long afterglow materials have a long history of development, but progress has been slow. It took nearly a hundred years to increase the afterglow time from a few minut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 张家骅钟瑞霞王笑军张霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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