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Method for rapidly synthesizing La2(MoO4)3: Eu<3+> nanometer fluorescent powder at low temperature

A technology of nano-fluorescent powder and fluorescent powder, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of a large amount of power, time and intermediate grinding, is not suitable for industrial production, and has high temperature requirements, and meets the requirements of preparation schedule. The effect of harshness, high yield and yield, simple preparation process

Pending Publication Date: 2021-03-05
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional preparation of molybdate-based phosphors by solid-state reaction technology usually requires high temperature and uses a lot of power, time and intermediate grinding, which is not suitable for industrial production

Method used

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  • Method for rapidly synthesizing La2(MoO4)3: Eu&lt;3+&gt; nanometer fluorescent powder at low temperature
  • Method for rapidly synthesizing La2(MoO4)3: Eu&lt;3+&gt; nanometer fluorescent powder at low temperature
  • Method for rapidly synthesizing La2(MoO4)3: Eu&lt;3+&gt; nanometer fluorescent powder at low temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1: La 2 (MoO 4 ) 3 :0.01Eu 3+

[0015] First, weigh Na with a purity greater than 99.9% according to the stoichiometric ratio 2 MoO 4 、LaCl 3 , EuCl 3 , in a planetary ball mill for 3 hours of ball milling. Then the raw materials were ground, washed with deionized water and absolute ethanol for 3 to 4 times respectively, and then dried at 80°C for 2 h to obtain the nano phosphor.

Embodiment 2

[0016] Example 2: La 2 (MoO 4 ) 3 :0.03Eu 3+

[0017] First, weigh Na with a purity greater than 99.9% according to the stoichiometric ratio 2 MoO 4 、LaCl 3 , EuCl 3 , in a planetary ball mill for 1 hour of ball milling. Then the raw materials were ground, washed with deionized water and absolute ethanol for 3 to 4 times respectively, and then dried at 60°C for 5 hours to obtain the nano phosphor.

Embodiment 3

[0018] Example 3: La 2 (MoO 4 ) 3 :0.05Eu 3+

[0019] First, weigh Na with a purity greater than 99.9% according to the stoichiometric ratio 2 MoO 4 、LaCl 3 , EuCl 3 , in a planetary ball mill for 2 hours of ball milling. Then the raw materials were ground, washed with deionized water and absolute ethanol for 3-4 times respectively, and then dried at 70°C for 3 hours to obtain nano phosphors.

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Abstract

The invention discloses a method for quickly synthesizing La2(MoO4)3: Eu<3+> nanometer fluorescent powder at a low temperature, belonging to the technical field of preparation and application of luminescent materials. The nanometer fluorescent powder satisfies the chemical formula of La2(MoO4)3: xEu<3+>, wherein x is greater than or equal to 0.01 and smaller than or equal to 0.09. The La2(MoO4)3:Eu<3+> nanometer fluorescent powder is quickly synthesized at a low temperature through a simple mechanochemical auxiliary solid-state elementary reaction which is a quick and spontaneous double-exchange reaction; the interchange of reactants is driven by lattice energy of symbiotic salt; and the method is simple in process, short in time and extremely low in temperature requirement. The preparedfluorescent powder has a small average particle size of 80-100 nm, has strong red light emission at 615 nm, and is suitable for industrial production.

Description

technical field [0001] The invention provides a low-temperature rapid synthesis of La 2 (MoO 4 ) 3 :Eu 3+ The invention relates to a nano phosphor powder method, which belongs to the technical field of preparation and application of luminescent materials. Background technique [0002] Field emission display (FED) devices are a special kind of display, and still dominate the display field due to their mature technology, low price and excellent performance. FED technology has received extensive attention from researchers due to its advantages such as thinner, brighter, contrast, viewing angle, and response time. The luminescent phosphor used in FED is the core component, and its performance and efficiency not only control the quality of the image, but also affect the energy consumption of the display device. Some sulfide-based materials such as Gd 2 o 2 S:Tb 3+ , SrGa 2 S 4 :Eu 3+ / C 3+ , Y 2 o 2 S:Eu 3+ , (Zn / Cd)S: Cu, Al, ZnS: Ag, Cl, etc. are also high-effici...

Claims

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Application Information

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IPC IPC(8): C09K11/78
CPCC09K11/7787
Inventor 张乐甄方正邵岑张永丽陈东顺赵超陈浩
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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