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Method for preparing novel red magnesium barium germinate fluorescent powder for displaying

A magnesium germanate and phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of lack of extensive and in-depth research on new luminophores, and achieve the effect of simple and easy method and good reproducibility.

Inactive Publication Date: 2008-10-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is a lack of extensive and in-depth research on new luminescent materials. In the future, with the advancement of information display technology, the quality and performance requirements of luminescent powder will be higher and higher, so the need to develop new luminescent materials will be more urgent

Method used

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  • Method for preparing novel red magnesium barium germinate fluorescent powder for displaying
  • Method for preparing novel red magnesium barium germinate fluorescent powder for displaying
  • Method for preparing novel red magnesium barium germinate fluorescent powder for displaying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the stoichiometric ratio Ba 1.92 MgGe 2 o 7 :Eu 3+ 0.08 Weigh 0.379 g of BaCO 3 , 0.097 g (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O, 0.209 g GeO 2 , 0.014 g Eu 2 o 3 and 0.6136 grams of NaCl and 0.7828 grams of KCl, put them into an agate mortar and grind until the reaction materials are mixed evenly and reach a certain fineness (usually about 30 minutes), then transfer to a corundum crucible and bake at 850 ° C for 6 hours and then cool in the furnace Take it out at room temperature, soak it in deionized water at about 60°C, and wash it several times. 3 Solution test without Cl - Dry in an oven at 80°C for 24h to obtain ~2μm Ba 1.92 MgGe 2 o 7 :Eu 3+ 0.08 Powder.

Embodiment 2

[0038] According to the stoichiometric ratio Ba 1.92 MgGe 2 o 7 :Eu 3+ 0.08 Weigh 0.294 gram BaO, 0.097 gram (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O, 0.209 g GeO 2 , 0.019 g Eu 2 (CO 3 ) 3 and 0.580 g of NaCl (0.010 mol), put it into an agate mortar and grind until the reaction raw materials are mixed evenly and reach a certain fineness (usually about 30 minutes), then transfer to a corundum crucible and bake at 750 ° C for 3 hours, then cool with the furnace Take it out at room temperature, soak it in deionized water at about 70°C, and wash it several times until the AgNO 3 Solution test without Cl - Dry in an oven at 80°C for 24h to obtain ~2μmBa 1.92 MgGe 2 o 7 :Eu 3+ 0.08 Powder.

[0039] From figure 1 It can be seen from the figure that the excitation and emission spectra of the obtained phosphor are obtained under the monitoring wavelength of 613nm. From the excitation diagram, it can be seen that the excitation peak is composed of two parts, and the 261 and 291...

Embodiment 3

[0041] According to the stoichiometric ratio Ba 1.92 MgGe 2 o 7 :Eu 3+ 0.08 Weigh 0.379 g of BaCO 3 , 0.097 g (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O, 0.209 g GeO 2 , 0.014 g Eu 2 o 3 Put 2.097 grams of NaCl three times the mass of the reaction raw materials into an agate mortar and grind until the reaction raw materials are mixed evenly and reach a certain fineness (usually about 30 minutes), and then transferred to a corundum crucible and roasted at 900 ° C for 8 hours Take it out with the furnace cooling to room temperature, soak it in deionized water at about 100°C, and wash it several times. 3 Solution test without Cl - Dry in an oven at 85°C for 24h to obtain ~2μm Ba 1.92 MgGe 2 o 7 :Eu 3+ 0.04 Powder.

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Abstract

The invention belongs to the rare earth luminescent material field, particularly relating to a method for making novel red magnesium barium germanate fluorescent powder used for display. The composition of the obtained magnesium barium germanate fluorescent powder is Ba(2-x)MgGe2O7:Eu<3+>x, wherein x is more than 0 and less than 1. The method comprises the following steps that: analytically pure reaction raw materials of barium salt, magnesium salt, GeO2, activator and corresponding molten slat are weighed up according to stoichiometric ratio and are put into an agate mortar to carry out grinding; thus, the reaction raw materials are evenly mixed and reach to certain fineness; the ground raw materials are put into a corundum crucible to carry out molten salt reaction at the temperature of between 650 and 1,200 DEG C for 3 to 10 hours, thereby obtaining a melted product; and the product is dried after the molten slat are washed away through deionized water so as to obtain a needed product. The method is simple and easily realized and has excellent reproducibility.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, and in particular relates to a preparation method of a novel red barium magnesium germanate fluorescent powder for display. Background technique [0002] In the past few decades, inorganic luminescent materials have been widely concerned as display luminescent materials for flat panel display, field emission display, plasma display, thin film electroluminescent materials and other fields. In the past, a lot of work was done to modify the already commercially available phosphors to improve their luminescence related technical indicators. For Y 2 o 3 :Eu 3+ , YAG:Eu 3+ There are many researches on the preparation methods, technical modification and coating of luminous bodies [1-9]. There is a lack of extensive and in-depth research on new luminescent materials. With the advancement of information display technology in the future, the requirements for the quality and performance ...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 雷芳闫冰
Owner TONGJI UNIV
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