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Manganese zinc aluminate luminescent material and preparation method thereof

A luminescent material, zinc aluminate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems affecting device performance, weaken electron emission, etc., and achieve enhanced luminous intensity, stable chemical properties and thermal properties

Active Publication Date: 2014-06-11
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The commercial cathodoluminescent powder is mainly sulfide. When it is used to make a field emission display, the sulfur in it will react with the trace amount of molybdenum, silicon or germanium in the cathode, thereby weakening its electron emission. which in turn affects the performance of the entire device

Method used

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  • Manganese zinc aluminate luminescent material and preparation method thereof
  • Manganese zinc aluminate luminescent material and preparation method thereof

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preparation example Construction

[0022] The preparation method of the above-mentioned zinc-manganese aluminate luminescent material comprises the following steps:

[0023] S1: Dissolve the alumina airgel in the ethanol solution of M salt, stir at 50-75°C for 0.5-3h, then sonicate for 10min, then dry at 60-150°C, grind the dried raw materials evenly, Calcining at 600-1200°C for 0.5-4 hours to prepare alumina airgel containing M nanoparticles; wherein, the molar ratio of alumina to M is greater than 0 and less than or equal to 5×10 -3 , preferably, the molar ratio of alumina to M is 5×10 -6 ~2.5×10 -3

[0024] S2, according to the general molecular formula Zn 1-x al 2 o 4 :Mn 2+ x ,M y For the stoichiometric ratio of each element in the formula, weigh the compounds corresponding to Zn and Mn and the alumina airgel containing M nanoparticles prepared in step S1, grind and mix evenly, heat up to 800 ° C ~ 1400 ° C for pre-calcination for 2 ~ 15 hours, then calcined at 1000°C-1400°C for 0.5-6 hours in air...

Embodiment 1

[0031] Example 1: Zn 0.999 Al 2 o 4 :Mn 2+ 0.001 ,

[0032] First weigh 0.6116g of alumina airgel, dissolve it to 24ml containing palladium chloride (PdCl 2 2H 2 O) 5×10 -6 mol / L ethanol solution, stirred at 65°C for 1.5h, then ultrasonicated for 10min, then dried at 120°C, ground the dried sample evenly, and pre-calcined at 1100°C for 2h to obtain aluminum oxide gas containing metal ions gel.

[0033] Then weigh the ZnC 2 o 4 2H 2 O 0.7569g, 0.4078g of Al containing metal ions 2 o 3 Aerogel, MnC 2 o 4 2H 2 O 0.0006g, put it in an agate mortar and grind until it is evenly mixed, then transfer the powder to a corundum crucible, heat-treat in a muffle furnace at 1400°C for 2h, and then sinter at 1400°C for 0.5h in a weak reducing atmosphere of CO , cooled to room temperature, you can get Pd-doped Zn 0.999 Al 2 o 4 :Mn 2+ 0.001 , Luminescent material.

Embodiment 2

[0034] Example 2: Zn 0.98 Al 2 o 4 :Mn 0.01 ,

[0035] First weigh 0.6117g of alumina airgel, dissolve it to 12ml containing auric acid chloride (HAuCl 4 )1×10 -2 mol / L ethanol solution, stirred at 75°C for 0.5h, then ultrasonicated for 10min, then dried at 150°C, ground the dried sample evenly, and pre-calcined at 1200°C for 0.5h to obtain aluminum oxide containing metal ions airgel.

[0036] Then weigh ZnCO 3 0.3073g, Al containing metal ions 2 o 3 Airgel 0.2549g, MnCO 3 0.0028g, put it in an agate mortar and grind it until it is evenly mixed, then transfer the powder to a corundum crucible, heat treat in a muffle furnace at 800°C for 15h, then sinter at 1000°C in an air atmosphere for 4h, and cool to room temperature. Get metal-doped Zn 0.98 Al 2 o 4 :Mn 0.01 , Luminescent material.

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Abstract

The invention belongs to the field of luminescent materials, and discloses a manganese zinc aluminate luminescent material and a preparation method thereof. The luminescent material has molecular formula of Zn1-xAl2O4:Mn<2+>x, My. M represents the doped metal nanoparticles and is at least one of Ag, Au, Pt, Pd and Cu metal nanoparticles, x is in the value range of: 0. The manganese zinc aluminate luminescent material provided by the invention uses alumina aerogel to adsorb metal nanoparticles, in order to obtain the Al2O3 alumina aerogel containing metal nanoparticles; and then the Al2O3 alumina aerogel containing metal nanoparticles is used as a raw material to prepare the luminescent material. By doping metal nanoparticles, luminous intensity of the luminescent material is enhanced.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a zinc-manganese aluminate luminescent material and a preparation method thereof. Background technique [0002] Field Emission Display (FED) is a flat panel display technology with great development potential. The working voltage of the field emission display device is lower than that of the cathode ray tube (CRT), usually less than 5kV, but the working current density is relatively large, generally in the range of 10-100μA·cm -2 . Therefore, there are higher requirements for luminescent powders used in field emission displays, such as better chromaticity, higher luminous efficiency at low voltage, and no brightness saturation at high current density °C. At present, the research on luminescent powder for field emission display mainly focuses on two aspects: one is to use and improve the existing CRT luminescent powder; the other is to search for new luminescent materials. The commerci...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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