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Red long-lasting phosphor material and production method thereof

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

Active Publication Date: 2017-07-25
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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  • Red long-lasting phosphor material and production method thereof
  • Red long-lasting phosphor material and production method thereof
  • Red long-lasting phosphor material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a) Weigh strontium carbonate, tin dioxide and europium oxide according to the stoichiometric molar ratio Sr:Sn:Eu=2:1:0.018, relative to the matrix SrSnO 3 The add-on is 6 mol% to take by weighing boric acid;

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

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

[0039] d) Grinding the dried raw materials in step c) into powder, using coal powder as a reducing agent, and adding 5% sublimated sulfur of coal powder weight to the coal powder, carrying out high-temperature solid-phase reaction in a weak reducing atmosphere, and calcining The temperature is 1250°C, and the holding time is 2h;

[0040] e) Take out the calcined sample in step d) and grind to obtain a red long-lasting luminescent material.

Embodiment 2

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

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

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

[0045] d) Grinding the dried raw materials in step c) into powder, using activated carbon as a reducing agent, and carrying out a high-temperature solid-phase reaction in a weak reducing atmosphere, the calcination temperature is 1350 ° C, and the holding time is 0.5 h;

[0046] e) Take out the calcined sample in step d) and grind to obtain a red long-lasting luminescent material.

Embodiment 3

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

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

[0050] c) Drying the homogeneously mixed raw materials in step b) at a drying temperature of 150°C and a drying time of 2 h;

[0051] d) Grinding the dried raw materials in step c) into powder, using coal powder as a reducing agent, performing a high-temperature solid-phase reaction in a weak reducing atmosphere, the calcination temperature is 1300 ° C, and the holding time is 1 h;

[0052] e) Take out the calcined sample in step d) and grind to obtain a red long-lasting luminescent material.

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Abstract

The invention discloses a red long-lasting phosphor material. The red long-lasting phosphor material is characterized by a double-matrix system, the formula of which is SrS / SrSnO3:Eu,Ln, wherein Ln is one of or a combination of more elements of Dy, Tb, Er, Ho, Pr, La, Sm, E, Nd, Y, Tm, Yb, Lu And Gd; the invention further discloses a production method of the red long-lasting phosphor material, the prepared red long-lasting phosphor material can be excited only by needing common visible light rather than hard light or show-wave band (ultraviolet) light, the excited material has excellent long-afterflow performance, and the stability of the matrixes is obviously enhanced. Compared with the sulfide matrix long-lasting phosphor material, the chemical stability can be remarkably improved, and especially the defect that the sulfide is easily air-slaked can be improved; compared with the stannate matrix long-lasting phosphor material, the red long-lasting phosphor material can extend the excited light wave length to the range of visible light, and can be excited by adopting common visible light, so that the application field can be extended.

Description

technical field [0001] The invention relates to the field of long afterglow luminescent materials, in particular to a red long afterglow luminescent material and a production method thereof. Background technique [0002] Long Persistent Phosphors (LPPs) is a new type of energy-saving and energy-storage material that can effectively absorb excitation light (such as sunlight) and continue to emit light for a long time after the excitation stops. It has broad application prospects in emergency instructions, architectural decoration, photoelectric components, biological imaging, clinical medicine, energy and environmental engineering and other fields. The existing long-lasting luminescent materials in the visible light region are mainly divided into blue, green and red long-lasting luminescent materials, among which blue (such as Sr 2 MgSi 2 o 7 : Eu 2+ , Dy 3+ , afterglow time>25 h) and green (such as SrAl 2 o 4 : Eu 2+ , Dy 3+ , afterglow time>15 h) the afterglo...

Claims

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Application Information

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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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