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Cyan silicate super-long afterglow luminescent material and preparation method thereof

A luminescent material and silicate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of single afterglow color and short afterglow time, and achieve the effects of long afterglow time, high afterglow intensity and excellent afterglow performance

Active Publication Date: 2018-12-07
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, compared with aluminate long afterglow materials, current silicate long afterglow materials have shorter afterglow time and single afterglow color

Method used

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  • Cyan silicate super-long afterglow luminescent material and preparation method thereof
  • Cyan silicate super-long afterglow luminescent material and preparation method thereof
  • Cyan silicate super-long afterglow luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Press Ba 1.98 Zr 2 Si 3 O 12 :0.01Eu 2+ , 0.01Nd 3+ The stoichiometric ratio shown in the molecular formula, weigh 0.3907g BaCO 3 , 0.2464g ZrO 2 , 0.1803g SiO 2 , 0.0018g Eu 2 O 3 And 0.0017g Nd 2 O 3 As raw materials, the weighed raw materials are ground and mixed uniformly and then placed in an alumina crucible, and pre-fired in an air atmosphere. The pre-fired temperature is 1200°C, and the pre-fired time is 4 hours. The mixture is naturally cooled and ground and mixed evenly. In an environment of 1400°C, calcined for 6 hours in a reducing atmosphere. The reducing atmosphere is composed of 95% nitrogen and 5% hydrogen. The calcined powder is cooled to room temperature with the furnace to obtain the calcined product; after grinding, prepare Obtained cyan silicate ultra-long afterglow luminescent material. figure 1 Shown is the XRD pattern of the long afterglow luminescent material, indicating that the phase of the material is Ba 2 Zr 2 Si 3 O 12 . The excitation and e...

Embodiment 2

[0040] Press Ba 1.98 Zr 1.5 Hf 0.5 Si 3 O 12 :0.01Eu 2+ , 0.01Nd 3+ The stoichiometric ratio shown in the molecular formula, weigh 0.3907gBaCO 3 , 0.3157g HfO 2 , 0.0616g ZrO 2 , 0.1803g SiO 2 , 0.0018g Eu 2 O 3 And 0.0017g Nd 2 O 3 As raw materials, the weighed raw materials are ground and mixed uniformly and then placed in an alumina crucible, and pre-fired in an air atmosphere. The pre-fired temperature is 1200°C, and the pre-fired time is 4 hours. The mixture is naturally cooled and ground and mixed evenly. In an environment of 1400°C, calcined for 6 hours in a reducing atmosphere. The reducing atmosphere is composed of 95% nitrogen and 5% hydrogen. The calcined powder is cooled to room temperature with the furnace to obtain the calcined product; after grinding, prepare Obtained cyan silicate ultra-long afterglow luminescent material. Figure 5 0.0020g sample Ba 1.98 Hf 1.5 Zr 0.5 Si 3 O 12 :0.01Eu 2+ , 0.01Nd 3+ The pyro-release spectrum measured after 3 minutes of simultane...

Embodiment 3

[0042] Press Ba 1.98 Hf 2 Si 3 O 12 :0.01Eu 2+ , 0.01Nd 3+ The stoichiometric ratio shown in the molecular formula, weigh 0.3907g BaCO 3 , 0.4210g HfO 2 , 0.1803g SiO 2 , 0.0018g Eu 2 O 3 And 0.0017g Nd 2 O 3 As raw materials, the weighed raw materials are ground and mixed uniformly and then placed in an alumina crucible, and pre-fired in an air atmosphere. The pre-fired temperature is 1200°C, and the pre-fired time is 4 hours. The mixture is naturally cooled and ground and mixed evenly. In an environment of 1400°C, calcined for 6 hours in a reducing atmosphere. The reducing atmosphere is composed of 95% nitrogen and 5% hydrogen. The calcined powder is cooled to room temperature with the furnace to obtain the calcined product; after grinding, prepare Obtained cyan silicate ultra-long afterglow luminescent material. Image 6 0.0020g sample Ba 1.98 Hf 2 Si 3 O 12 :0.01Eu 2+ , 0.01Nd 3+ The pyro-release spectra measured after 3 minutes of simultaneous irradiation of light sources wi...

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Abstract

The invention provides a cyan silicate super-long afterglow luminescent material and a preparation method thereof. The chemical expression of the luminescent material is Ba2-m-nZr2-x-yHfxSnySi3O12:Eum, Rn, wherein m is more than 0 but less than or equal to 0.05; n is more than or equal to 0 but less than or equal to 0.05; x is more than or equal to 0 but less than or equal to 2; y is more than orequal to 0 but less than or equal to 2; x+y is more than or equal to 0 but less than or equal to 2; R is one or two of Tb, Ce, Dy, Tm, Nd, Gd, Y, Er, La, Pr, Sm, Yb, Lu and Ho. The cyan silicate super-long afterglow luminescent material is prepared according to the following steps: weighting raw materials according to the stoichiometric ratio of all the chemical compositions in the chemical expression, mixing and grinding, pre-sintering and then calcining under high temperature, cooling following a furnace and then grinding. The luminescent material has high cyan afterglow strength and long afterglow time, has the excellent performances of silicate long afterglow luminescent material as well as the afterglow time equivalent to that of aluminate long afterglow luminescent material, and is simple in preparation method, pollution-free and low-cost.

Description

Technical field [0001] The invention belongs to the technical field of long-lasting luminescent materials, and relates to a silicate long-lasting luminescent material that can continuously emit cyan ultra-long afterglow after being irradiated with ultraviolet light or visible light; the invention also relates to a preparation of the long-lasting luminescent material method. Background technique [0002] In order to solve the problems of poor water resistance and insufficient luminescence color of aluminate long afterglow materials, silicate systems with stable chemical properties, multiple luminescence colors, abundant raw materials and low prices have become the hot spot in the development of long afterglow materials in recent years. The intensity and duration of the afterglow luminescence of the system still need to be improved. The patent "A yellow silicate long afterglow luminescent material and its preparation method" (patent number ZL201410791393.2, announcement number CN1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
CPCC09K11/7792
Inventor 王育华郭海洁
Owner LANZHOU UNIVERSITY
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