Yttria-based red long-afterglow luminescent material and preparation method thereof

A technology of long afterglow luminescence and yttrium oxide, applied in the field of long afterglow luminescent materials and their preparation, yttrium oxide-based red light emitting long afterglow materials and their preparation

Inactive Publication Date: 2013-12-18
ZHANJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, with Y 2 o 3 Holmium ions Ho have not been involved in red long-lasting luminescent materials as hosts 3+ and neodymium ions Nd 3+

Method used

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  • Yttria-based red long-afterglow luminescent material and preparation method thereof
  • Yttria-based red long-afterglow luminescent material and preparation method thereof
  • Yttria-based red long-afterglow luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh yttrium oxide Y 2 o 3 : 2.258g, europium oxide Eu 2 o 3 : 0.03518g, holmium oxide Ho 2 o 3 : 0.033647g and neodymium oxide Nd 2 o 3 : 0.0377859g, and boric acid H 3 BO 3 : 0.0618g. Mix and grind the above raw materials thoroughly, then burn them under the air atmosphere at 1250°C for 4 hours, and then you can get the composition Y after taking them out. 2 o 3 : 0.01Eu 3+ , 0.01Ho 3+ , 0.01Nd 3+ The long afterglow phosphor activated by trivalent europium, the phosphor emits a red long afterglow visible to the naked eye after being excited by 254nm light, and the afterglow decays exponentially.

Embodiment 2

[0019] Weigh yttrium oxide Y 2 o 3 : 2.258g, europium oxide Eu 2 o 3 : 0.07036g, holmium oxide Ho 2 o 3 : 0.033647g and neodymium oxide Nd 2 o 3 : 0.0377859g, and boric acid H 3 BO 3 : 0.0618g. Mix and grind the above raw materials thoroughly, then burn them under the air atmosphere at 1250°C for 4 hours, and then you can get the composition Y after taking them out. 2 o 3 : 0.02Eu 3+ , 0.01Ho 3+ , 0.01Nd 3+ The long afterglow phosphor activated by trivalent europium, the phosphor emits a red long afterglow visible to the naked eye after being excited by 254nm light, and the afterglow decays exponentially.

Embodiment 3

[0021] Weigh yttrium oxide Y 2 o 3 : 2.258g, europium oxide Eu 2 o 3 : 0.10554g, holmium oxide Ho 2 o 3 : 0.033647g and neodymium oxide Nd 2 o 3 : 0.0377859g, and boric acid H 3 BO 3 : 0.0618g. Mix and grind the above raw materials thoroughly, then burn them under the air atmosphere at 1250°C for 4 hours, and then you can get the composition Y after taking them out. 2 o 3 : 0.03Eu 3+ , 0.01Ho 3+ , 0.01Nd 3+ The long afterglow phosphor activated by trivalent europium, the phosphor emits a red long afterglow visible to the naked eye after being excited by 254nm light, and the afterglow decays exponentially.

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Abstract

The invention discloses a yttria-based red long-afterglow luminescent material and a preparation method thereof. A chemical characteristic formula of the luminescent material is Y2O3: aEu3+, bHo3+, cNd 3+, wherein Eu3+, Ho3+ and Nd3+ are respectively of an activator, and in the formula O (a is less than or equal to 0.03, O(b is less than or equal to 0.03, and O(c is less than or equal to 0.03. The preparation method of the luminescent material is that yttria (Y2O3), europium oxide (Eu2O3), holmium oxide (Ho2O3) are measured according to the mol ratio of the chemical characteristic formula Y2O3: aEu3+, bHo3+, cNd3+ (in the formula, O(b is less than or equal to 0.03, and O(c is less than or equal to 0.03), then a fluxing agent diboron trioxide (B2O3) or boric acid (H3BO3) is added, the raw materials are adequately ground and are placed into a corundum crucible after being uniformly blended, the corundum crucible is placed into a high-temperature furnace to be burned in an oxygen or an air atmosphere to obtain the red long-afterglow luminescent material; after being activated by the ultraviolet light, a sample of the material emits bright red light, the transmission peak is located at 612nm through the measurement in phosphorescence spectrum; after the activation of the ultraviolet light is removed, an obvious red long-afterglow property of the sample can be seen by eyes; the phosphorescence attenuation presents in an index law; and the preparation method is simple and is free from the protection of the reduction atmosphere furnace, and the mass production can be realized.

Description

technical field [0001] The invention relates to a long afterglow luminescent material and a preparation method thereof, in particular to a rare earth ion-activated yttrium oxide-based red light emitting long afterglow material and a preparation method thereof, belonging to the technical field of luminescent materials. Background technique [0002] Long afterglow luminescent material is a new type of functional material that can absorb external excitation light, store it, and then emit light in the dark. At present, yellow-green long-afterglow materials and blue long-afterglow materials have entered the stage of commercial operation, while red long-afterglow materials have not yet reached the level of the above-mentioned yellow-green and blue long-afterglow materials in terms of afterglow time and luminous intensity. [0003] Rare earth-activated red light emitting long afterglow materials have been using europium and thulium co-doped calcium sulfide (CaS:Eu,Tm) system and eu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 谢伟
Owner ZHANJIANG NORMAL UNIV
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