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A kind of sulfur oxide red long afterglow luminescent material and preparation method thereof

A technology of long-lasting luminescence and sulfur oxides, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of long reaction time, complicated post-treatment process, high raw material cost, etc., achieve low production cost, avoid environmental pollution and complex Process, the effect of improving the reactivity

Active Publication Date: 2018-07-20
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 200910026093.4 reports the red long afterglow luminescent material Y 2 o 2 S:Eu 3+ , Ca 2+ , Ti 4+ , and its reaction time is long (8 hours), producing toxic gas sulfur dioxide SO 2 , the cost of raw materials (rare earth element Y) is high, and the product needs to be washed many times, and the post-treatment process is more complicated

Method used

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  • A kind of sulfur oxide red long afterglow luminescent material and preparation method thereof
  • A kind of sulfur oxide red long afterglow luminescent material and preparation method thereof

Examples

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example 1

[0017] According to chemical formula Sr 0.8 Ca 0.2 S 0.6 o 0.4 : 0.002Eu, 0.004Dy stoichiometric ratio, accurate weighing of SrSO 4 (99.99%), SrCO 3 (99.99%), CaCO 3 (99.99%), CaF 2 (99.99%), Eu 2 o 3 (99.99%), Dy 2 o 3 (99.99%) raw material, the molar ratio of the addition of activated carbon powder to strontium sulfate is 2:1. Put the above-mentioned weighed raw materials in an agate mortar, add an appropriate amount of distilled water and grind for 60 minutes, dry them, put them into a corundum crucible, and react for 2 hours under a nitrogen atmosphere at 1000°C. Grind the product finely and pass through a 100-mesh sieve to obtain the product.

example 2

[0019] According to chemical formula Sr 0.9 Ca 0.1 S 0.7 o 0.3 : 0.005Eu, 0.01Dy stoichiometric ratio, accurate weighing of SrSO 4 (99.99%), SrCO 3 (99.99%), CaCO 3 (99.99%), CaF 2 (99.99%), Eu 2 o 3 (99.99%), Dy 2 o 3 (99.99%) raw material, the molar ratio of the addition of activated carbon powder to strontium sulfate is 2:1. Put the above-mentioned weighed raw materials in an agate mortar, add an appropriate amount of distilled water and grind for 60 minutes, dry them, put them into a corundum crucible, and react for 2 hours under a nitrogen atmosphere at 1000°C. Grind the product finely and pass through a 100-mesh sieve to obtain the product.

example 3

[0021] According to chemical formula Sr 0.95 Ca 0.05 S 0.7 o 0.3 : 0.01Eu, 0.03Dy stoichiometric ratio, accurate weighing of SrSO 4 (99.99%), SrCO 3 (99.99%), CaCO 3 (99.99%), CaF 2 (99.99%), Eu 2 o 3 (99.99%), Dy 2 o 3 (99.99%) raw material, the molar ratio of the addition of activated carbon powder to strontium sulfate is 2:1. Put the above-mentioned weighed raw materials in an agate mortar, add an appropriate amount of distilled water and grind for 60 minutes, dry them, put them into a corundum crucible, and react for 2 hours under a nitrogen atmosphere at 1000°C. Grind the product finely and pass through a 100-mesh sieve to obtain the product.

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Abstract

The invention discloses a sulfur oxide red long-lasting phosphor material and a preparation method thereof. The structural formula of the material is SrxCa(1-x)SyO(1-y): Eu, Re, wherein x is more than or equal to 0.05 but less than or equal to 0.2, y is more than or equal to 0.1 but less than or equal to 0.4, and Re represents at least one of the following elements: Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm and Lu. The preparation method is a solid phase reaction method which comprises the following step of reacting for 1-3 hours at 900-1200 DEG C. The preparation method disclosed by the invention is simple in process and low in cost, and the prepared luminescent material is high in physical and chemical stability, can be effectively excited by blue light and near ultraviolet light, has remarkable afterglow, and can be widely applied to the display lighting field.

Description

technical field [0001] The invention relates to a long afterglow luminescent material, in particular to a sulfur oxide red long afterglow luminescent material, and a preparation method thereof. technical background [0002] Long afterglow luminescent material is a kind of photoinduced energy storage functional material, which can absorb light radiation to store energy, and can release energy continuously in the form of photons when there is no irradiated light source. Its main purpose is to indicate lighting in low-light environments, such as luminous signs, emergency lighting, architectural art, high-energy particle / ray detection, three-dimensional memory and other application fields. According to the different afterglow colors, the long afterglow materials in the visible light region can be divided into blue-green and red luminescent materials, among which the blue-green materials are mainly alkaline earth aluminates and silicates, and the afterglow brightness and time hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/56
Inventor 周有福许文涛黄得财
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI