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A porous long-lasting luminescent material and its preparation method

A technology for long afterglow luminescence and tablet pressing, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low brightness and insufficient afterglow time, and achieve the effects of increasing light absorption, improving luminescence performance, and improving refraction and diffuse reflection.

Active Publication Date: 2019-04-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide a method for preparing a porous long-lasting luminescent material, which solves the problems of insufficient afterglow time and low brightness after the existing long-lasting luminescent material is pulverized

Method used

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  • A porous long-lasting luminescent material and its preparation method
  • A porous long-lasting luminescent material and its preparation method
  • A porous long-lasting luminescent material and its preparation method

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preparation example Construction

[0030] The preparation method of the above-mentioned porous long-lasting luminescent material of the present invention is specifically implemented according to the following steps:

[0031] Step 1, raw material preparation: MCO 3 , SiO 2 , MgO, Eu 2 o 3 、Dy 2 o 3 By chemical expression M 2-x-y MgSi 2 o 7 :xEu 2+ ,yDy 3+ The required component ratio is weighed, where M is one of Sr, Ca, Ba, 0.01≤x≤0.06, 0.01≤y≤0.1, mixed evenly, and ground for 30-60 minutes to obtain the mixed raw material A;

[0032] Step 2, pre-calcining the mixed raw material A prepared in step 1 for the first time, the firing temperature is 900°C-1100°C, and the firing time is 2-4h;

[0033] Step 3. Add a pore-forming agent to the mixed raw material A after the first pre-calcination in step 2. The mass of the pore-forming agent is 1% to 10% of the mass of the mixed raw material A. Mix evenly and grind for 30-60 minutes, and then place In the tablet press, the pressure of the tablet press is set t...

Embodiment 1

[0045] Chemical composition formula Sr 1.96 MgSi 2 o 7 :0.02Eu 2+ ,0.02Dy 3+ Preparation of porous long-lasting luminescent material:

[0046] Step 1. Take the x value as 0.02, the y value as 0.02, M as Sr, and weigh the strontium carbonate (SrCO 3 , purity is 99.0%) 1.4467g, magnesium oxide (MgO, purity is 98.5%) 0.2015g, silicon dioxide (SiO 2 , purity is 98.0%) 0.6048g, europium oxide (Eu 2 o 3 , purity is 99.99%) 0.01759g, dysprosium oxide (Dy 2 o 3 , purity is 99.99%) 0.01865g, mix uniformly, grind 60min, obtain mixed raw material A;

[0047] Step 2. Put the mixed raw material A obtained in step 1 into a corundum crucible, place it in a rapid heating resistance furnace, raise the temperature to 1100°C in an air atmosphere, keep it warm for 4 hours, cool with the furnace, and take it out after cooling to room temperature;

[0048] Step 3, add starch in the mixed raw material A after the firing of step 2 gained, starch is 5% of the quality of mixed raw material A,...

Embodiment 2

[0053] Chemical composition formula Sr 1.93 MgSi 2 o 7 :0.06Eu 2+ ,0.01Dy 3+ Preparation of porous long-lasting luminescent material:

[0054] Step 1. Take the x value as 0.06, the y value as 0.01, M as Sr, and weigh the strontium carbonate (SrCO 3 , purity is 99.0%) 1.4245g, magnesium oxide (MgO, purity is 98.5%) 0.2015g, silicon dioxide (SiO 2 , purity is 98.0%) 0.6048g, europium oxide (Eu 2 o 3 , purity is 99.99%) 0.05277g, dysprosium oxide (Dy 2 o 3 , the purity is 99.99%) 0.009325g, mixed uniformly and ground for 30min to obtain mixed raw material A;

[0055] Step 2. Put the mixed raw material A obtained in step 1 into a corundum crucible, place it in a rapid heating resistance furnace, raise the temperature to 1100°C in an air atmosphere, keep it warm for 3 hours, cool with the furnace, and take it out after cooling to room temperature;

[0056] Step 3. Add ammonium bicarbonate to the fired mixed raw material A obtained in step 2. The ammonium bicarbonate is 10...

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Abstract

The invention discloses a porous long-lasting phosphor material. The chemical formula of the porous long-lasting phosphor material is M2-x-y MgSi2O7: xEu<2+>, yDy<3+>, the material is prepared from MCO3, SiO2, MgO, Eu2O3 and Dy2O3 by using a high-temperature solid-phase method, M is one of Sr, Ca or Ba, x is greater than or equal to 0.01 or less than or equal to 0.06, and y is greater than or equal to 0.01 or less than or equal to 0.1. The invention further discloses a preparation method of the porous long-lasting phosphor material. The preparation method comprises the following steps: weighing MCO3, SiO2, MgO, Eu2O3 and Dy2O3 according to components of the chemical formula, grinding, pre-burning, adding a pore forming material, tabletting, sintering, and cooling, thereby obtaining the porous long-lasting phosphor material. The porous long-lasting phosphor material is high in surface light absorption amount, moderate in defect density in crystal granule and high in light emission property; by adopting the preparation method, the surface light absorption amount and the defect density of the crystal granules are increased, good operability can be achieved, and a simple synthesis process is available.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to a porous long-lasting luminescent material, and also relates to a preparation method of the porous long-lasting luminescent material. Background technique [0002] Long afterglow luminescent material is an energy-saving and environmentally friendly material that can continue to emit light for a long period of time after being irradiated by an external light source. Long-lasting luminescent materials have characteristic absorption peaks and emission peaks, and can store energy, so they have strong application prospects in radiation monitoring, biomedicine, photocatalysis and other fields. However, due to the poor light transmission due to the accumulation of defects, the interior of the material cannot be excited, which limits its application field. [0003] In long-lasting luminescent materials, defects play a leading role in long-lasting luminescent properties, espe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59
CPCC09K11/7792
Inventor 海鸥任强武秀兰曾柏林张昭晖李东明魏博
Owner SHAANXI UNIV OF SCI & TECH
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