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Aluminate luminescent material and preparation method thereof

A technology of luminescent materials and aluminates, which is applied in the direction of luminescent materials, chemical instruments and methods, and can solve the problems of low energy conversion efficiency of rare earth ions and affecting luminous efficiency, etc.

Inactive Publication Date: 2011-06-22
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy conversion efficiency of rare earth ions doped in the matrix is ​​still not high, which greatly affects the luminous efficiency

Method used

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  • Aluminate luminescent material and preparation method thereof
  • Aluminate luminescent material and preparation method thereof
  • Aluminate luminescent material and preparation method thereof

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[0031] see Figure 7 , illustrating the process flow of the aluminate luminescent material preparation method of the embodiment of the present invention, the preparation method includes the following steps:

[0032] S01: Select the source compound of alkaline earth metal ion, the source compound of aluminum ion and the source compound of Re ion and praseodymium ion according to the stoichiometric ratio, and the stoichiometric ratio is according to the structural formula M 1-x-y PR x Eu y Al 12 o 19 The molar ratio of the corresponding elements in, wherein, M is an alkaline earth metal element, Re is Eu, Sm or a combination of both, x=0.005-0.1, y=0.01-0.2;

[0033] S02: mix each source compound evenly;

[0034] S03: pre-sintering or pre-burning the mixture, and then cooling;

[0035] S04: taking out the cooled product and grinding it, then calcining the ground product, and obtaining the aluminate luminescent material after cooling.

[0036] In step S01, the source compo...

Embodiment 1

[0050] Weigh strontium carbonate SrCO 3 1.3877g, praseodymium oxide Pr 6 o 11 0.0170g, europium oxide Eu 2 o 3 0.0880g, aluminum oxide Al 2 o 3 6.1176g and boric acid H 3 BO 3 0.0618g (10%) was placed in an agate mortar and thoroughly ground, then placed in a corundum crucible and pre-fired at 500°C for 1h, then cooled to room temperature, taken out and fully ground again. Finally, it was calcined at 1500°C for 5h, cooled, taken out and ground to obtain powdery Sr 0.94 PR 0.01 Eu 0.05 Al 12 o 19 Red fluorescent aluminate luminescent material.

Embodiment 2

[0052] Weigh strontium carbonate SrCO 3 0.6495g, praseodymium oxide Pr 6 o 11 0.0170g, europium oxide Eu 2 o 3 0.0880g, magnesium oxide MgO 0.0240g, aluminum oxide Al 2 o 3 3.0282g and boric acid H 3 BO 3 0.0309g was placed in an agate mortar and thoroughly ground, then put into a corundum crucible and pre-fired at 500°C for 1h, then cooled to room temperature, taken out and fully ground again. Finally, it was calcined at 1500°C for 5 hours, cooled, taken out and ground to obtain the powdery red fluorescent aluminate luminescent material Sr 0.88 PR 0.02 Eu 0.10 Mg 0.12 Al 11.88 o 19 .

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Abstract

The invention provides an aluminate luminescent material. The structural formula of the aluminate luminescent material is M1-x-yPrxReyAl12O19, wherein M is an alkaline earth metal element; Re is Eu, Sm or the combination of Eu and Sm; x is between 0.005 and 0.10; y is between 0.01 and 0.20. The invention also provides the preparation method of the aluminate luminescent material, which comprises the following steps: preparing a source compound of alkaline earth metal ions, source compound of aluminum ions and source compounds of Re ions and praseodymium ions according to a stoichiometric ratiowhich is determined according to the molar ratio of the corresponding elements in the structural formula, namely M1-x-yPrxReyAl12O19; uniformly mixing the source compounds uniformly; performing the per-sintering or pre-burning treatment of the mixture, and cooling; and grinding the cooled product, calcining the ground product and cooling to obtain the aluminate luminescent material. In the aluminate luminescent material, through the energy transfer by Pr<3+>, vacuum ultraviolet light energy can be utilized fully, the energy conversion rate can be improved and the luminous efficiency can be improved obviously.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to an aluminate luminescent material which is excited by vacuum ultraviolet light and emits light and a preparation method thereof. Background technique [0002] In the traditional lighting and display fields, the commonly used fluorescent materials mostly use low-pressure mercury vapor discharge as the excitation light source, and the research and technology of this material are very mature. However, mercury has the following disadvantages: mercury vapor is poisonous, and it will affect human health after inhalation, and even threaten human life. At the same time, mercury will also pollute the soil; mercury is liquid at normal temperature, and it needs mercury vapor The discharge is excited, so it takes a certain amount of time to fully light up, which is not good for emergency lighting. Therefore, in consideration of environmental protection and applicat...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 周明杰刘军梁小芳刘世良
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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