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Silicate long-persistence luminescent material and preparation method thereof

A long afterglow luminescence, silicate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problem of short afterglow time, and achieve the effect of simple synthesis method, obvious energy saving effect, and water stability

Inactive Publication Date: 2017-03-15
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent "Silicate Long Afterglow Luminescent Material and Its Manufacturing Method" (patent number ZL98105078.6, announcement number CN1062581C, announcement date 2001.02.28) discloses a silicate long afterglow luminescent material and its manufacturing method. The main compound contained is M 2 MgSi 2 o 7 or Mg 3 Si 2 o 8 (M is calcium, strontium, barium); the yellow silicon disclosed in the patent application "A Yellow Silicate Long-lasting Luminescent Material and Its Preparation Method" (publication number CN201610213306.4, public date CN105778898A, public date 2016.07.20) The afterglow time of the salt long afterglow luminescent material is only about 8 minutes, which is shorter than that of the aluminate long afterglow material, which limits the application of this material

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  • Silicate long-persistence luminescent material and preparation method thereof
  • Silicate long-persistence luminescent material and preparation method thereof
  • Silicate long-persistence luminescent material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0061] Press Ba 0.98 ZrSi 3 o 9 : 0.01Eu 2+ , 0.01Pr 3+ Stoichiometric ratio shown in molecular formula, weigh 0.1934g BaCO 3 , 0.1232g ZrO 2 , 0.1803g SiO 2 , 0.0018g Eu 2 o 3 and 0.0017g Pr 6 o 11 As a raw material, the weighed raw materials are ground and mixed evenly, put into an alumina crucible, and pre-fired in an air atmosphere. The pre-fired temperature is 800 ° C, and the pre-fired time is 2 hours. Calcined in a reducing atmosphere for 6 hours in an environment of 1400°C, the reducing atmosphere is composed of 95% nitrogen and 5% hydrogen by volume, and the calcined powder is cooled to room temperature with the furnace to obtain a calcined product; after grinding, the A cyan long afterglow luminescent material was obtained. figure 1 Shown is the XRD pattern of the long-lasting luminescent material, indicating that the phase of the material is BaZrSi 3 o 9 , only a small amount of impurity phase is produced. The excitation and emission spectra of the lon...

Embodiment 2

[0063] Press Ba 0.98 wxya3 o 9 : 0.01Eu 2+ , 0.01Pr 3+ Stoichiometric ratio shown in molecular formula, weigh 0.1934g BaCO 3 , 0.2105g HfO 2 , 0.1803g SiO 2 , 0.0018g Eu 2 o 3 and 0.0017g Pr 6 o 11 As a raw material, the weighed raw materials were mixed and ground evenly, then put into an alumina crucible, pre-sintered in an air atmosphere, the pre-sintering temperature was 800°C, and the pre-sintering time was 2 hours to obtain a mixture. The mixture was naturally cooled, ground evenly, and then Calcined in a reducing atmosphere at a temperature of 1400°C for 6 hours. The reducing atmosphere is composed of 95% nitrogen and 5% hydrogen by volume. The calcined powder is cooled to room temperature with the furnace to obtain a calcined product; after grinding, the A cyan long afterglow luminescent material was obtained. Figure 5 Shown is the XRD spectrum of the long-lasting luminescent material, indicating that the phase of the material is BaHfSi 3 o 9 , only a small...

Embodiment 3

[0065] Press Ba 0.98 wxya 3 o 9 : 0.01Eu 2+ , 0.01Yb 3+ Stoichiometric ratio shown in molecular formula, weigh 0.1934g BaCO 3 , 0.2105g HfO 2 , 0.1803g SiO 2 , 0.0018g Eu 2 o 3 and 0.0020g Yb 2 o 3 As a raw material, mix and grind the weighed raw materials evenly, put them into an alumina crucible, and pre-fire in an air atmosphere. , and then calcined in a reducing atmosphere at a temperature of 1400°C for 6 hours. The reducing atmosphere is composed of 95% nitrogen and 5% hydrogen by volume. The calcined raw material powder is cooled to room temperature with the furnace to obtain a calcined product; grinding Finally, a cyan long-lasting luminescent material is obtained. Figure 9 0.0010g sample Ba 0.98 wxya 3 o 9 : 0.01Eu 2+ , 0.01Yb 3+ The pyrolysis spectrum measured after 10 seconds of simultaneous irradiation of light sources with a wavelength of 254nm and a wavelength of 365nm shows that there are three strong pyrolysis peaks in the sample, which are loca...

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Abstract

The invention provides a silicate long-persistence luminescent material and a preparation method thereof. The chemical expression of the luminescent material is Ba1-x-y-ZrSi3O9: Eux, Ry or Ba1-x-yHfSi3O9: Eux, Ry, wherein x is more than 0 and smaller than or equal to 0.05 and y is more than 0 and smaller than or equal to 0.05. The preparation method comprises the following steps of: weighing raw materials according to a stoichiometric ratio of all chemical components in the chemical expression of the long-persistence luminescent material; mixing and uniformly grinding all the raw materials to obtain raw material powder; after pre-sintering the raw material powder, calcining at a high temperature; cooling to a room temperature along a furnace to obtain a calcined product; and grinding to prepare the green long-persistence luminescent material. The luminescent material provided by the invention can emit bright green light, not only has excellent performances of an existing silicate long-persistence luminescent material, but also has persistence time equivalent with an aluminate long-persistence luminescent material; the preparation method is simple, has low pollution and has relatively low cost.

Description

technical field [0001] The invention belongs to the technical field of long afterglow luminescent materials, and relates to a silicate long afterglow luminescent material capable of emitting a continuous cyan long afterglow after being irradiated by ultraviolet light or visible light; the invention also relates to a preparation method of the long afterglow luminescent material. Background technique [0002] Since the discovery of the long afterglow phenomenon in the early 20th century, the research on long afterglow materials has made great progress. The visible light long afterglow systems currently studied mainly include metal sulfides, sulfur oxides, aluminates, silicates, phosphates, and titanates. The salient feature of the metal sulfide system is that it has rich luminous colors and can cover the luminous area from blue to red, but its disadvantages are that it is easy to decompose in the air, has poor stability, low initial brightness of afterglow, and short afterglow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59C09K11/67
CPCC09K11/7734C09K11/7792
Inventor 王育华郭海洁
Owner LANZHOU UNIVERSITY
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