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Yellow long-afterglow luminescent material as well as preparation method and application thereof

A technology of long afterglow luminescence and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of easy deliquescence and insufficient chemical stability, and achieve long afterglow duration, high stability and simple preparation process. Effect

Active Publication Date: 2019-01-18
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But SrAl 2 o 4 :Eu 2+ , Dy 3+ The chemical properties are not stable enough in the air atmosphere, prone to deliquescence

Method used

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  • Yellow long-afterglow luminescent material as well as preparation method and application thereof
  • Yellow long-afterglow luminescent material as well as preparation method and application thereof
  • Yellow long-afterglow luminescent material as well as preparation method and application thereof

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preparation example Construction

[0026] The preparation method of the above-mentioned yellow long-lasting luminescent material also provided by the embodiment of the present invention includes the following steps:

[0027] S1. Weigh the Ba-containing compound, Sn-containing compound, Ge-containing compound, Dy-containing compound and Re-containing compound according to the molar ratio of each element in the expression, mix and grind the above-mentioned raw materials to obtain raw material powder .

[0028] Further, in step S1, each of the above raw materials is selected from oxides containing corresponding elements, salts or a mixture of the two; wherein the salts are selected from nitrates and / or carbonates. In a preferred embodiment of the present invention, the Ba-containing compound can be selected from its oxide, nitrate or carbonate, the Sn-containing and Ge-containing compound can be selected from its oxide, and the Dy-containing and Re-containing compound can be selected from its oxide or nitric acid....

Embodiment 1～6

[0045] Embodiments 1-6 respectively provide a yellow long-lasting luminescent material, and its preparation steps are as follows:

[0046] (1) Weigh and mix the raw materials of each element according to the table below, and add absolute ethanol to grind thoroughly for 3 hours to obtain the raw material powder.

[0047]

[0048]

[0049] (2) Put the raw material powder into a high-temperature tube furnace, raise the temperature to 800°C at a rate of 5°C / min in an air atmosphere, and then lower it to 200°C at a rate of 10°C / min after burning for 2 hours, then cool naturally with the furnace to room temperature to obtain a pre-sintered sample.

[0050] (3) After the pre-sintered sample is cooled to room temperature, take it out and grind it fully, put it into the high-temperature tube furnace again, and raise the temperature to 1300°C at a rate of 7°C / min in the air atmosphere, burn it for 4 hours and then leave it in the furnace. Cool naturally to room temperature.

[0...

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Abstract

The invention provides a yellow long-afterglow luminescent material and relates to the field of novel inorganic functional materials. The yellow long-afterglow luminescent material is characterized inthat germanium barium stannate is used as a substrate of the luminescent material and a trivalent rare-earth ion Dy<3+> is used as an activating agent; an expression formula of the yellow long-afterglow luminescent material is as follows: Ba1-xSnGe3O9:xDy<3+> or Ba1-x-ySnGe3O9:xDy<3+>,yRe, wherein Re is selected from one or more of La<3+>, Ce<3+>, Pr<3+>, Nn<3+>, Sm<3+>, Eu<3+>, Gd<3+>, Tb<3+>, Ho<3+>, Yb<3+>, Lu<3+> and Er<3+>; x is greater than or equal to 0.0005 and less than or equal to 0.05; and y is greater than or equal to 0.0005 and less than or equal to 0.05. The material can emit yellow afterglow visible to naked eyes and has the advantages of relatively strong afterglow strength, relatively slow afterglow attenuation and relatively long afterglow lasting time. The invention further discloses a preparation method of the yellow long-afterglow luminescent material; the preparation method has the advantages of simple preparation technology, easiness for controlling conditions and low equipment requirements; and no toxic gas is generated in a preparation process and pollution to the environment is not caused.

Description

technical field [0001] The invention relates to the field of novel inorganic functional materials, and in particular to a yellow long-lasting luminescent material and its preparation method and application. Background technique [0002] Long persistence luminescence refers to an optical phenomenon that can continue to emit light for several minutes to several hours after the excitation source is removed. The process is mainly divided into energy absorption, energy storage and energy release, namely the afterglow luminescence stage. The long afterglow phenomenon has been observed and recorded in ancient times, but it was not until modern times that people began to gradually understand and study its luminescence phenomenon and luminescence mechanism. And because of its excellent characteristics such as environmental protection, harmlessness and recyclability, long-lasting luminescent materials have attracted people's attention in recent years, and their research and developmen...

Claims

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Application Information

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IPC IPC(8): C09K11/66
CPCC09K11/7707C09K11/7793
Inventor 付晓燕
Owner XIAMEN UNIV OF TECH
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