Yellow long-afterglow luminescent material and preparation method thereof

A technology of long afterglow materials and luminescent materials, applied in the field of materials science, can solve the problems of long afterglow time, difficulty of yellow long afterglow luminescent materials, good chemical stability, etc., and achieve non-radiation, significant technological progress, and stable chemical properties Effect

Inactive Publication Date: 2015-09-02
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a yellow long-lasting luminescent m

Method used

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  • Yellow long-afterglow luminescent material and preparation method thereof
  • Yellow long-afterglow luminescent material and preparation method thereof
  • Yellow long-afterglow luminescent material and preparation method thereof

Examples

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Embodiment 1

[0020] A yellow long-lasting luminescent material, using calcium stannate as the luminescent material matrix, using trivalent dysprosium ion Dy 3+ As a luminescent activator, boric acid was used as a flux for material synthesis.

[0021] The above-mentioned preparation method of a yellow long-lasting luminescent material specifically comprises the following steps:

[0022] 1) Calculated as a molar percentage, i.e. CaCO 3 : SnO 2 : Dy 2 o 3 :H 3 BO 3 The ratio of 65.463%: 32.814%: 0.082%: 1.641%, weigh chemically pure CaCO 3 , SnO 2 , Dy 2 o 3 and H 3 BO 3 ;

[0023] 2) Grind the above-mentioned raw materials in a mortar for 1 hour to mix the powder evenly, then pass through a 200-mesh sieve, and press the sieved powder into tablets;

[0024] 3) Put the above mixture into a crucible, then burn it in a high-temperature furnace at 1350°C for 4 hours, cool it down to room temperature naturally, take it out, and crush it through a 200-mesh sieve to obtain a yellow long...

Embodiment 2

[0030] A yellow long-lasting luminescent material, using calcium stannate as the luminescent material matrix, using trivalent dysprosium ion Dy 3+ As a luminescent activator, boric acid was used as a flux for material synthesis.

[0031] The above-mentioned preparation method of a yellow long-lasting luminescent material specifically comprises the following steps:

[0032] 1) Calculated as a molar percentage, i.e. CaCO 3 : SnO 2 : Dy2 o 3 :H 3 BO 3 65.383%: 32.841%: 0.164%: 1.642%, weigh chemically pure CaCO 3 , SnO 2 , Dy 2 o 3 and H 3 BO 3 ;

[0033] 2) Grind the above-mentioned raw materials in a mortar for 1 hour to mix the powder evenly, then pass through a 200-mesh sieve, and press the sieved powder into tablets;

[0034] 3) Put the above mixture into a crucible, then burn it in a high-temperature furnace at 1350°C for 4 hours, cool it down to room temperature naturally, take it out, and crush it through a 200-mesh sieve to obtain a yellow long afterglow mate...

Embodiment 3

[0039] A yellow long-lasting luminescent material, using calcium stannate as the luminescent material matrix, using trivalent dysprosium ion Dy 3+ As a luminescent activator, boric acid was used as a flux for material synthesis.

[0040] The above-mentioned preparation method of a yellow long-lasting luminescent material specifically comprises the following steps:

[0041] 1) Calculated as a molar percentage, i.e. CaCO 3 : SnO 2 : Dy 2 o 3 :H 3 BO 3 The ratio of 65.132%: 32.895%: 0.329%: 1.645%, weigh chemically pure CaCO 3 , SnO 2 , Dy 2 o 3 and H 3 BO 3 ;

[0042] 2) Grind the above-mentioned raw materials in a mortar for 1 hour to mix the powder evenly, then pass through a 200-mesh sieve, and press the sieved powder into tablets;

[0043] 3) Put the above mixture into a crucible, then burn it in a high-temperature furnace at 1350°C for 4 hours, cool it down to room temperature naturally, take it out, and crush it through a 200-mesh sieve to obtain a yellow long...

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Abstract

The invention relates to a yellow long-afterglow luminescent material utilizing calcium stannate as a luminescent material substrate, trivalence dysprosium irons Dy<3+> as a luminescent activating agent and boric acid as a material synthesis fluxing agent. The invention also provides a preparation method of the yellow long-afterglow luminescent material. The preparation method comprises the steps of measuring raw materials such as CaCO3, SnO2, H3BO3 and Dy2O3 according to a chemical measuring ratio, sufficiently grinding the raw materials, uniformly mixing the ground raw materials to obtain a mixture I, filtering the mixture I by means of a sieve with the granularity of 180-220 meshes to obtain mixed powder, tabletting the obtained mixed powder, then calcining the mixed powder, naturally cooling the mixed powder to room temperature, grinding the mixed powder, filtering the mixed powder by means of the sieve with the granularity of 180-220 meshes, thereby obtaining the yellow long-afterglow luminescent material. After being radiated by ultraviolet rays, the material emits out light in yellow rays; after a light source is moved away, the material can continuously emit out light in a luminescent brightness capable of being distinguished by eyes. The preparation method of the yellow long-afterglow luminescent material is simple, pollution-free, radiation-free and low in cost.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a luminescent material, specifically a yellow long-lasting luminescent material and a preparation method thereof. Background technique [0002] Long afterglow luminescent material is a kind of photoluminescent material, which generates light when excited by an external light source, absorbs light energy and stores it, and slowly releases the stored energy in the form of light after the excitation stops . Due to its unique afterglow performance, long afterglow luminescent materials are widely used in luminous materials, safety instructions and low-light emergency lighting. The first generation of long afterglow materials are mainly sulfides represented by zinc sulfide and calcium sulfide. In recent years, aluminate and silicate materials, represented by excellent luminescent properties, long afterglow time and good chemical stability, have risen rapidly. However, t...

Claims

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Application Information

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IPC IPC(8): C09K11/66
CPCC09K11/66
Inventor 常程康石明明章冬云李南郭芸芸邓玲孙怡雯郭倩王永强蔡元元陈雪平钟国兵
Owner SHANGHAI INST OF TECH
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