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Gallate luminescent material and preparation method therefor

A luminescent material and gallate technology, applied in the field of luminescent materials, can solve the problems of limited application of field emission displays and vacuum fluorescent displays, low luminous efficiency, etc.

Inactive Publication Date: 2014-03-12
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency of gallate luminescent materials generally prepared at present is not high, which limits their application in fields such as field emission displays and vacuum fluorescent displays.

Method used

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  • Gallate luminescent material and preparation method therefor
  • Gallate luminescent material and preparation method therefor

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preparation example Construction

[0023] see figure 1 , the preparation method of one embodiment comprises the following steps:

[0024] S101, according to Zn 1-x Ga 2-y o 4 :Mn x ,Sn y The molar ratio of the compound and SnO containing Zn, Ga and Mn were weighed 2 It is used as a raw material, and the raw material is ground and mixed uniformly to obtain a mixture.

[0025] In this embodiment, the compounds containing Zn, Ga and Mn may be oxides, carbonates, oxalates, acetates or nitrates of Zn, Ga and Mn, respectively. Zinc oxide (ZnO), gallium oxide (Ga 2 o 3 ), manganese oxide (MnO 2 ), zinc carbonate (ZnCO 3 ), gallium carbonate (Ga 2 (CO 3 ) 3 ), manganese carbonate (MnCO 3 ), zinc oxalate (ZnC 2 o 4 2H 2 O), gallium oxalate (Ga 2 (C 2 o 4 ) 3 4H 2 O), manganese oxalate (MnC 2 o 4 2H 2 O), zinc acetate (Zn(CH 3 COO) 2 2H 2 O), gallium acetate (Ga(CH 3 COO) 3 ), manganese acetate (Mn(CH 3 COO) 2 4H 2 O), zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), gallium nitrate (Ga(NO 3 ) 3 ...

Embodiment 1

[0033] Preparation of Zn by High Temperature Solid Phase Method 0.99 Ga 1.98 o 4 :Mn 0.01 ,Sn 0.02 :

[0034] Choose ZnCO 3 , Ga 2 (CO 3 ) 3 , MnCO 3 and SnO 2as the main raw material. Weigh 0.5124gZnCO respectively 3 , 1.2650gGa 2 (CO 3 ) 3 , 0.0046gMnCO 3 and 0.0121gSnO 2 , mix the above materials evenly and put them in a high temperature furnace, under 95%N 2 with 5%H 2 Calcined at 800°C for 6 hours in a reducing atmosphere, the calcined product was cooled to room temperature with the furnace, that is, after the heating in the furnace was stopped, the calcined product was still placed in the high temperature furnace, and slowly cooled to room temperature together with the high temperature furnace. The resulting product is ground into a powder to obtain a chemical formula of Zn 0.99 Ga 1.99 o 4 :Mn 0.01 ,Sn 0.01 gallate luminescent material.

Embodiment 2

[0036] Preparation of Zn by High Temperature Solid Phase Method 0.98 Ga 1.95 o 4 :Mn 0.02 ,Sn 0.05 :

[0037] Choose ZnCO 3 , Ga 2 (CO 3 ) 3 , MnCO 3 and SnO 2 as the main raw material. Weigh 0.6340gZnCO respectively 3 , 1.5573gGa 2 (CO 3 ) 3 , 0.0115gMnCO 3 and 0.0377gSnO 2 , mix the above raw materials evenly and place them in a high-temperature furnace under 95% N 2 with 5%H 2 Calcined at a temperature of 1200°C for 8 hours in a reducing atmosphere, the calcined product was cooled to room temperature with the furnace, and the obtained product was ground into powder to obtain the chemical formula Zn 0.98 Ga 1.95 o 4 :Mn 0.02 ,Sn 0.05 gallate luminescent material.

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Abstract

Provided is a gallate luminescent material. The general chemical formula of the gallate luminescent material is Zn1-xGa2-yO4:Mnx, Sny, wherein, x is more than 0 and less than or equal to 0.1 and y is more than 0.001 and less than or equal to 0.05. Provided is a preparation method for the gallate luminescent material. The preparation method comprises the following steps: according to mol ratios of Zn1-xGa2-yO4:Mnx, Sny, compounds containing Zn, Ga and Mn and SnO2 are weighed respectively as raw materials; the raw materials are ground and mixed uniformly and a mixture is obtained; the mixture is calcined for 1-8h at the temperature of 800-1400 DEG C; the calcined mixture is cooled to the room temperature, a gallate luminescent material with a chemical formula of Zn1-xGa2-yO4:Mnx, Sny is obtained, Mn and Sn are doped in the gallate, wherein, x is more than 0 and less than or equal to 0.1 and y is more than 0.001 and less than or equal to 0.05. In the above gallate luminescent material and the preparation method therefor, tin metal particles are introduced, thus the luminous efficiency of the gallate luminescent material is raised greatly under the same excitation condition.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a gallate luminescent material and a preparation method thereof. Background technique [0002] With the development of flat panel displays, the requirements for cathodoluminescent materials are getting higher and higher. In order to obtain high-brightness and high-efficiency phosphors, it is very important to select a suitable matrix material. [0003] Among the fluorescent materials used in traditional field emission devices, there is a kind of oxide series phosphors. Oxide phosphors are widely used because of their good thermal stability. Among them, gallate luminescent materials have the characteristics of good stability. However, currently generally prepared gallate luminescent materials have low luminous efficiency, which limits their application in fields such as field emission displays and vacuum fluorescent displays. Contents of the invention [0004] Ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD