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A kind of green long-lasting phosphor and preparation method thereof

A technology of long afterglow phosphors and phosphors, applied in the field of phosphors, which can solve the problems of poor chemical stability and achieve the effects of high afterglow brightness, long afterglow time, and enhanced afterglow brightness and time

Active Publication Date: 2018-12-07
江苏古涟光学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of poor chemical stability of green long-lasting materials in the prior art, the present invention provides a novel green long-lasting phosphor and a preparation method thereof. The phosphor has good chemical stability, high afterglow brightness, and afterglow Long time and other advantages, can be used in safety fire, emergency lighting instructions and other fields

Method used

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  • A kind of green long-lasting phosphor and preparation method thereof
  • A kind of green long-lasting phosphor and preparation method thereof
  • A kind of green long-lasting phosphor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0123] A green long-lasting phosphor with a chemical composition of Ba 2.97 SiAl 2 o 8 : 0.02Eu 2+ , 0.01Tm 3+ .

[0124] A kind of preparation method of green long afterglow phosphor, with high-purity BaCO 3 , SiO 2 、Al 2 o 3 、Eu 2 o 3 and Tm 2 o 3 As a raw material, according to the chemical composition Ba 2.97 SiAl 2 o 8 : 0.02Eu 2+ , 0.01Tm 3+ The ratio of each element in the formula is accurately weighed for each raw material; agate balls are used as grinding balls, absolute ethanol is used as a ball milling medium, agate balls, absolute ethanol and raw materials are put into a ball mill tank at the same time, and ball milled on a planetary ball mill Mix the mixture for 5 hours to form a slurry mixture, the mass ratio of absolute ethanol to raw materials is 2:3; place the obtained slurry mixture in an oven, heat and dry it at 70°C for 8 hours, and then dry The obtained raw materials pass through a 300-mesh sieve to obtain uniformly mixed raw materials; pu...

Embodiment 2

[0126] A green long-lasting phosphor with a chemical composition of Ba 2.96 SiAl 2 o 8 : 0.02Eu 2+ , 0.02Gd 3+ .

[0127] A kind of preparation method of green long afterglow phosphor, with high-purity BaCO 3 , SiO 2 、Al 2 o 3 、Eu 2 o 3 and Gd 2 o 3 As a raw material, according to the chemical composition Ba 2.96 SiAl 2 o 8 : 0.02Eu 2+ , 0.02Gd 3+ The ratio of each element in the formula is accurately weighed for each raw material; agate balls are used as grinding balls, absolute ethanol is used as a ball milling medium, agate balls, absolute ethanol and raw materials are put into a ball mill tank at the same time, and ball milled on a planetary ball mill Mix for 15 hours to form a slurry mixture, the mass ratio of absolute ethanol to raw materials is 2:3; place the obtained slurry mixture in an oven, heat and dry it at 80°C for 6 hours, and then dry The obtained raw materials pass through a 300-mesh sieve to obtain uniformly mixed raw materials; put the unifo...

Embodiment 3

[0129] A green long-lasting phosphor with a chemical composition of Ba 2.94 SiAl 2 o 8 : 0.03Eu 2+ , 0.03Nd 3+ .

[0130] A kind of preparation method of green long afterglow phosphor, with high-purity BaCO 3 , SiO 2 、Al 2 o 3 、Eu 2 o 3 and Nd 2 o 3 As a raw material, according to the chemical composition Ba 2.94 SiAl 2 o 8 : 0.03Eu 2+ , 0.03Nd 3+ The ratio of each element in the formula is accurately weighed for each raw material; agate balls are used as grinding balls, absolute ethanol is used as a ball milling medium, agate balls, absolute ethanol and raw materials are put into a ball mill tank at the same time, and ball milled on a planetary ball mill Mix for 10 hours to form a slurry mixture, the mass ratio of absolute ethanol to raw materials is 2:3; place the obtained slurry mixture in an oven, heat and dry it at 75°C for 7 hours, and then dry The obtained raw materials pass through a 300-mesh sieve to obtain uniformly mixed raw materials; put the unifo...

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Abstract

The invention discloses green long-persistence fluorescent powder and a preparation method thereof, provides a fluorescent powder material having green long-persistence fluorescent performance, whichbelong to the technical field of the fluorescent powder. A chemical composition general formula of the fluorescent powder is Ba3-x-ySiAl2O8:xEu<2+>,yRe<3+>, wherein Re is one or combination of Tm, Gdand Nd, value ranges of x and y are characterized in that x is greater than or equal to 0.01 and less than or equal to 0.05, and y is greater than or equal to 0.01 or less than or equal to 0.10. A luminescence center of the fluorescent powder is Eu<2+> ion, and the long-persistence effect can be effectively enhanced by introducing the rare earth impurities ions such as Tm<3+>, Gd<3+> and Nd<3+>. The green long-persistence fluorescent powder has the characteristics of good chemical stability, high afterglow brightness, and long afterglow time, and can be used in the fields of safety fire control and emergency lighting indication.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder, and in particular relates to a green long-lasting fluorescent powder and a preparation method thereof. Background technique [0002] Long afterglow luminescent materials, also known as light storage materials, energy storage luminescent materials or luminous materials, have unique advantages in solar energy conversion and utilization. When there is external light, it can store light energy, and when there is no external light , which can slowly release the stored light energy, is an important light-light conversion material and energy-saving material, commonly known as luminous powder or long afterglow powder in China, academically known as long phosphorescent phosphor or long-term luminescence Material. Long afterglow luminescent materials are widely used in many aspects of industrial and agricultural production, military affairs, fire protection and people's life, especially in safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/02C09D11/00C09D7/61
CPCC09D11/00C09K11/025C09K11/7792
Inventor 杨道救
Owner 江苏古涟光学材料有限公司
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