Method for preparing strontium aluminate long-persistence luminescent materials based on nanometer fusing assistants

A technology of luminescent materials and fluxes, which is applied in the direction of luminescent materials, chemical instruments and methods, sustainable manufacturing/processing, etc., can solve the problems of high energy consumption, high reaction temperature, and long reaction time, so as to promote uniform growth and improve Luminous center density, slow decomposition effect

Inactive Publication Date: 2010-07-07
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention adopts the technical scheme of preparing strontium aluminate long afterglow material by liquid-assisted solid-phase method, which overcomes the defects of high reaction temperature, long reaction time and high energy consumption of traditional high-temperature solid-phase method; meanwhile, it also solves the problem of traditional products seeking flux The boron content is high, so that the product is easy to over-sinter, which makes the product broken and the application effect is poor

Method used

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  • Method for preparing strontium aluminate long-persistence luminescent materials based on nanometer fusing assistants
  • Method for preparing strontium aluminate long-persistence luminescent materials based on nanometer fusing assistants
  • Method for preparing strontium aluminate long-persistence luminescent materials based on nanometer fusing assistants

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Experimental program
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Embodiment approach

[0056] combine figure 1 , the process and operation steps of preparing strontium aluminate long-lasting luminescent material based on nano-flux are as follows:

[0057] (1) First measure 200ml of analytically pure absolute ethanol solution and put it into beaker A, according to the molar ratio H of the composition mixture 3 BO 3 : NH 3 ·H 2 O=5:1 Weigh the corresponding analytically pure raw material boric acid H 3 BO 3 3.0917g, it is added in the beaker A that dehydrated alcohol solution is housed, and in beaker A, add 10 polyethylene glycol solutions as dispersant, stir with glass rod and make boric acid fully dissolve, make solution A; Simultaneously , First measure 200ml of analytically pure absolute ethanol solution and put them into beaker B 1 , Beaker B 2 in, according to H 3 BO 3 : Al(NO 3 ) 3 9H 2 O=1:2 Weigh the corresponding analytically pure raw material boric acid H 3 BO 3 1.2367g, add it to beaker B with absolute ethanol solution 1 , stir with a gl...

Embodiment 1

[0072] 1. the mixed material of step (1)-(7) gained in the general implementation mode presses figure 2 The ratio of raw materials in the embodiment 1 table is selected;

[0073] ② Fully grind the above-mentioned mixed materials in an agate mortar for 2 hours to make them evenly mixed, and then put the evenly mixed materials into the corundum crucible;

[0074] ③Use carbon powder as a reducing agent and make a closed carbon tank. Put the above-mentioned corundum crucible filled with materials into the closed carbon tank and seal it. Put the closed carbon tank in a high-temperature furnace and heat it to 1100°C. Hours, cooling with the furnace temperature, taking out the bulky solid reaction product, pulverizing the reaction product to obtain a near-yellow-green long-lasting strontium aluminate product;

[0075] ④ After the above strontium aluminate product is irradiated with 365nm ultraviolet rays for 10 minutes, it will show a green afterglow glow in the dark; when the ligh...

Embodiment 2

[0077] 1. the mixed material of step (1)-(7) gained in the general implementation mode presses image 3 The ratio of raw materials in the embodiment 2 table is selected;

[0078] ② Fully grind the above-mentioned mixed materials in an agate mortar for 2 hours to make them evenly mixed, and then put the evenly mixed materials into the corundum crucible;

[0079] ③Use carbon powder as a reducing agent and make a closed carbon tank. Put the above-mentioned corundum crucible filled with materials into the closed carbon tank and seal it. Hours, cooling with the furnace temperature, taking out the bulky solid reaction product, pulverizing the reaction product to obtain a near-yellow-green long-lasting strontium aluminate product;

[0080] ④ After the above strontium aluminate product is irradiated with 365nm ultraviolet rays for 10 minutes, it will show a green afterglow glow in the dark; when the light source is removed, the luminous brightness of the strontium aluminate product t...

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Abstract

The invention provides a method for preparing strontium aluminate long-persistence luminescent materials based on nanometer fusing assistants. The invention has the technical scheme that the method comprises the following steps: simultaneously preparing a nanometer ammonium pentaborate powder fusing assistant A and a nanometer aluminium borate powder fusing assistant B by a liquid phase method; then, obtaining boron of a mixed fusing assistant and a defect forming assistant through the introduction of the fusing assistant A and the fusing assistant B; and finally, using solid-phase reaction for preparing the long-persistence luminescent materials at the low reaction temperature. The invention overcomes the defects of overhigh temperature required by the reaction, high cost of equipment used in the reaction, high consumption of energy required in the synthesis process, poor luminescent performance of products and the like when the existing solid-phase method is used for preparing the strontium aluminate long-persistence luminescent materials. At the same time, the invention also solves the problems that the traditional products only pursue the persistence time, so the fusing assistant with high boron content is added, the strontium aluminate reaction products can easily obtain the excessive sintering, and the application effect of the pulverized strontium aluminate reaction products is poor. The luminescent materials of the invention are mainly applied to the fields of safety passage display, luminescent printing ink, luminous lighting and light detection, and are also usedfor novel energy-saving LED lamps with persistence.

Description

technical field [0001] The invention relates to the preparation of a long afterglow luminescent material, in particular to a method for preparing a strontium aluminate long afterglow luminescent material based on a nano flux. Background technique [0002] SrAl 2 o 4 : Eu 2+ , Dy 3+ It is a rare earth ion doped long afterglow luminescent material based on alkaline earth aluminate. Since T. Matsuzawa in Japan firstly reported that it was prepared as a long afterglow material in 1996, it can be excited under various light sources such as ultraviolet rays and fluorescent lamps with its excitation bandwidth; the afterglow time is long, up to 10 hours or more; it can be widely used in Electronics, electrical appliances, transportation, energy and other aspects have long been favored by people, and their preparation methods are constantly being improved. For example, CN1837328A discloses a method for preparing ultra-fine and high-brightness strontium aluminate long afterglow m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
CPCY02P20/10
Inventor 肖思国舒伟丁建文阳效良
Owner XIANGTAN UNIV
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