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A red long afterglow luminescent material and its production method

A long afterglow luminescence, red technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that the excitation intensity in the visible light region needs to be improved, the luminous brightness is not enough, and the afterglow time does not meet the application requirements.

Active Publication Date: 2022-06-14
HANGZHOU NABEL CERAMIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of this system is that the luminous brightness is not enough, and the afterglow time does not meet the application requirements, and it often needs strong light such as xenon lamp or short-wavelength (such as ultraviolet) light to be well excited, so the excitation intensity in the visible light region is also low. needs improvement
Silicate system with CdSiO 3 :Sm 3+ and MgSiO 3 :Mn 2+ , Eu 2+ , Dy 3+ Red and long afterglow luminescent materials, they have good chemical stability and thermal stability, but the disadvantages are short afterglow time and low brightness, which do not meet the practical requirements
Sr in aluminate system 3 Al 2 o 6 :Eu 2+ , Dy 3+ It is a red long afterglow material, its luminous brightness and afterglow time are not enough, and its water resistance is poor
In summary, the existing red long-lasting luminescent materials have their own advantages and disadvantages, and none of them can fully meet the requirements of practical applications. Therefore, it is particularly necessary to research and develop red long-lasting luminescent materials with good matrix stability and excellent afterglow performance.

Method used

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  • A red long afterglow luminescent material and its production method
  • A red long afterglow luminescent material and its production method
  • A red long afterglow luminescent material and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a) Sr:Sn:Eu=2:1:0.018 by stoichiometric molar ratio, strontium carbonate, tin dioxide and gallium oxide are weighed, relative to the matrix SrSnO 3 The amount of addition is 6mol% weighed boric acid;

[0037] b) Add water to the mixture in step a, the amount of water is 2 times the weight of the mixture, wet blend grinding for 120min;

[0038] c) Dry the raw materials mixed uniformly after grinding at a drying temperature of 150 °C and a drying time of 3h;

[0039] d) The raw materials are ground into a powder after drying in step c), the pulverized coal is used as a reducing agent, and 5% of the sublimation sulfur of the weight of the pulverized coal is added to the pulverized coal, and the high temperature solid phase reaction is carried out in a weak reducing atmosphere, the calcination temperature is 1250 °C, and the holding time is 2h;

[0040] e) Remove the calcined sample from step d) and grind it to obtain a red long afterglow glow material.

Embodiment 2

[0042] a) Serbiometric molar ratio Sr:Sn:Eu:S=2:1:0.006:0.012 Weigh strontium carbonate, tin dioxide, europium oxide and sublimated sulfur;

[0043] b) Add water to the mixture in step a, the amount of water is 3 times the weight of the mixture, wet blend grinding for 2h;

[0044]c) Dry the raw materials mixed uniformly after step b) grinding, the drying temperature is 200 ° C, and the drying time is 1h;

[0045] d) The raw materials are ground into a powder after drying in step c), activated carbon is used as a reducing agent, and the high temperature solid phase reaction is carried out in a weak reducing atmosphere, the calcination temperature is 1350 °C, and the heat preservation time is 0.5h;

[0046] e) Remove the calcined sample from step d) and grind it to obtain a red long afterglow glow material.

Embodiment 3

[0048] a) Sr:Sn:Eu=2:1:0.01 weigh strontium carbonate, tin dioxide and gallium oxide by stoichiometric molar ratio, with respect to the matrix SrSnO 3 The amount of addition is 20mol% weighing boric acid;

[0049] b) Add water to the mixture in step a), the amount of water is 2 times the weight of the mixture, wet blend grinding for 1h;

[0050] c) Mix the homogeneous raw materials after grinding for drying, drying temperature 150 °C, drying time 2h;

[0051] d) The raw materials are ground into a powder after drying in step c), and the pulverized coal is used as a reducing agent, and the high-temperature solid phase reaction is carried out in a weak reducing atmosphere, the calcination temperature is 1300 °C, and the holding time is 1h;

[0052] e) Remove the calcined sample from step d) and grind it to obtain a red long afterglow glow material.

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PUM

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Abstract

The invention discloses a red long afterglow luminescent material, which is characterized by a double-matrix system and has a chemical formula of SrS / SrSnO 3 : Eu, Ln, wherein Ln is a combination of one or more elements in Dy, Tb, Er, Ho, Pr, La, Sm, Ce, Nd, Y, Tm, Yb, Lu and Gd; the present invention also discloses The production method of the above-mentioned red long-lasting luminescent material is described. The red long-lasting luminescent material prepared by the present invention does not need to be excited by strong light or short-wave band (such as ultraviolet) light, but can be excited by ordinary visible light. The excited material has excellent long-lasting Afterglow performance, and matrix stability is significantly improved. Compared with sulfide-based long-lasting luminescent materials, it can significantly improve its chemical stability, especially the defect that sulfide is prone to deliquescence; compared with stannate-based long-lasting luminescent materials, it can extend the wavelength of excitation light to the visible light range, It can be excited by ordinary visible light, which expands its application field.

Description

Technical field [0001] The present invention relates to the field of long afterglow luminescent materials, in particular to red long afterglow luminescent materials and production methods thereof. Background [0002] Long Persistent Phosphors (LPPs) is a new type of energy-saving and energy storage materials that can effectively absorb excitation light (such as sunlight) and continue to emit light for a long time after excitation stops, and has a wide range of application prospects in the fields of low-light lighting, emergency indication, building decoration, optoelectronic components, biological imaging, clinical medicine and energy and environmental engineering. The long afterglow luminescent materials in the existing visible light area are mainly divided into blue, green and red long afterglow luminescent materials, of which blue (such as Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ , afterglow time >25h) and green (such as SrAl 2 O 4 :Eu 2+ ,Dy 3+ The afterglow time >15h) long afterg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/84
CPCC09K11/7729C09K11/774C09K11/7797
Inventor 夏昌奎余爱民余剑峰余惠谢明锋王菲菲
Owner HANGZHOU NABEL CERAMIC
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