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Germinate green long-afterglow light-emitting material and preparation method thereof

A technology of long-lasting luminescence and germanate, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unable to meet the needs of lighting, limit the application range, and prone to phase transition, etc., and achieve the benefit of pilot test and production , High luminous efficiency, not easy to hydrolyze

Inactive Publication Date: 2016-11-23
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For long afterglow green powder SrAl 2 o 4 : Eu 2+ , Dy 3+ Mainly through Dy 3+ Non-equivalent replacement of Sr 2+ Ions have created electron traps and hole traps of suitable depth and have high-efficiency luminous efficiency and super strong afterglow to occupy the commercial market, but this commercial green powder is easily hydrolyzed when it meets water [X.D.Lü, Mater.Chem.Phys.93( 2005) 526-530.] and poor heat resistance is prone to phase transition at 650 ° C [M.Avdeev, S.Yakovlev, A.A.Yaremchenko, V.V.Kharton, J.Solid State Chem.180, (2007) 3535.] and greatly Limits its scope of application, so it cannot meet the needs of various lighting in the market

Method used

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  • Germinate green long-afterglow light-emitting material and preparation method thereof
  • Germinate green long-afterglow light-emitting material and preparation method thereof
  • Germinate green long-afterglow light-emitting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to ZnO:GeO 2 :Mn 2+ =2 (1-0.02): 1.5: 0.02 molar ratio, respectively accurately weigh 0.7976g solid zinc oxide ZnO (analytical pure), 0.7845 solid germanium oxide GeO 2 (analytical pure), 0.0245g solid manganese acetate Mn(Ac) 2 4H 2 O (analytically pure), fully grind for 30 minutes to make the mixture uniform. Under air conditions, put the mixture in a muffle furnace at 700°C for 5 hours, take it out after cooling, and grind it again for 10 minutes to obtain a precursor, put the precursor into the air at -1100°C for 3 hours, and cool Take it out to get the product. Utilize XRD powder diffractometer (Bruker D8Advance) to detect the phase of product under room temperature condition, as figure 1 As shown in a, XRD shows that the product is pure Zn 2 GeO 4 phase; the material emits bright green light under the irradiation of ultraviolet light; using Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.), the luminescence properties of the product a...

Embodiment 2

[0022] According to ZnO:GeO 2 :Mn 2+ =2(1-0.001):1.5:0.001 molar ratio, accurately weigh 0.8131g solid zinc oxide ZnO (analytical pure), 0.7845g solid germanium oxide GeO respectively 2 (analytical pure), 0.0012g solid manganese acetate Mn(Ac) 2 4H 2 O (analytically pure), fully grind for 20 minutes to make the mixture uniform. Under air conditions, put the mixture in a muffle furnace at 600°C to melt for 4 hours, take it out after cooling, and grind it again for 20 minutes to obtain a precursor, put the precursor in the air at 1000°C for 4 hours, and take it out after cooling , the product is obtained. Utilize XRD powder diffractometer (Bruker D8Advance) to detect the phase of product under room temperature condition, show that product is pure Zn 2 GeO 4 Phase; using Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.), detect the luminescence performance of the product at room temperature, the product is excited at a wavelength of 336nm and emits a broad band...

Embodiment 3

[0024] According to ZnO:GeO 2 :Mn 2+ =2(1-0.08):1.5:0.08 molar ratio, accurately weigh 0.7487g solid zinc oxide ZnO (analytical pure), 0.7845g solid germanium oxide GeO respectively 2 (analytical pure), 0.0980g solid manganese acetate Mn(Ac) 2 4H 2 O (analytically pure), fully grind for 30 minutes to make the mixture uniform. Under air conditions, put the mixture in a muffle furnace at 800°C for 3 hours, take it out after cooling, and grind it again for 20 minutes to obtain a precursor, put the precursor in the air at 900°C for 5 hours, and take it out after cooling , the product is obtained. Utilize XRD powder diffractometer (Bruker D8Advance) to detect the phase of product under room temperature condition, show that product is pure Zn 2 GeO 4 phase; Utilize Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.) to detect the luminescent performance of the product at room temperature, the product is excited at a wavelength of 336nm and emits a wide band of 490-5...

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PUM

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Abstract

The invention discloses a germanate green long-lasting luminescent material and a preparation method thereof. The chemical composition of the material is 2(1-i)ZnO.(1+x)GeO 2 .yMgF 2 : iMn 2+ , where 0.1≤x≤5, 0.01≤y≤0.16, 0.001≤i≤0.08. Using zinc oxide, germanium oxide, magnesium fluoride and manganese acetate as raw materials, the solid raw materials are ground and mixed uniformly by high-temperature solid-phase method, and sintered in air at 600-800°C and 900-1100°C for 3-5 hours respectively. Under the irradiation of ultraviolet light, the material invents bright green light, and the brightness is much higher than that of Zn 2 GeO 4 :Mn 2+ with SrAl 2 o 4 : Eu 2+ , Dy 3+ , Afterglow time up to 1 to 5 hours. The product involved in the present invention not only overcomes the commercial green powder SrAl 2 o 4 : Eu 2+ , Dy 3+ It has the disadvantages of easy hydrolysis, poor heat resistance and high-temperature phase transition, and has low equipment requirements and simple preparation process.

Description

technical field [0001] The invention relates to a green long-lasting luminescent material, in particular to a high-efficiency long-lasting luminescent material capable of broad-band absorption in the ultraviolet region and broad-band emission in the green light region, and specifically relates to a long-lasting luminescent material whose brightness is long-lasting Green powder 2(1-i)ZnO.(1+x)GeO 2 .yMgF 2 : iMn 2+ , the brightness is Zn 2 GeO 4 :Mn 2+ Twice that of commercial evergreen powder SrAl 2 o 4 : Eu 2+ , Dy 3+ three times that of Zn 2 GeO 4 :Mn 2+ Significantly enhanced, the afterglow time is as long as 1 to 5 hours. Background technique [0002] Since the beginning of the 20th century, long-lasting luminescent materials have attracted much attention because of their wide application value. Among them, emergency lighting, traffic signs, graphic art, interior decoration, etc. are closely related to our lives. At present, people are constantly developing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
Inventor 连漪梦王爱银朱江明杨陶敏潘跃晓
Owner WENZHOU UNIVERSITY
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