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Tetravalent manganese ion doped red fluorescent material and preparation method thereof

A tetravalent manganese ion, red fluorescence technology is applied in the field of tetravalent manganese ion doped germanate (aluminum or gallium) lithium red fluorescent material and its preparation, which can solve the problems of high cost and high price of germanium raw materials, and achieve excellent performance , good thermal stability, simple and easy preparation method

Inactive Publication Date: 2016-02-24
JINGGANGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of germanium raw materials, the cost of this red phosphor is relatively high

Method used

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  • Tetravalent manganese ion doped red fluorescent material and preparation method thereof
  • Tetravalent manganese ion doped red fluorescent material and preparation method thereof
  • Tetravalent manganese ion doped red fluorescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Select lithium-containing compound raw materials, aluminum (Al) or gallium (Ga)-containing compound raw materials, germanium-containing compound raw materials, and manganese-containing compound raw materials as starting materials, according to the element molar ratio Li:R:Ge:Mn=1 : 1: (2-x): x, respectively accurately weigh four kinds of raw materials, where x is respectively 0.001, 0.002, 0.004, 0.006, 0.008, 0.01, 0.03, 0.06, 0.1, and R is expressed as: aluminum (Al) or Gallium (Ga). ① Weigh lithium carbonate, aluminum oxide, germanium oxide and manganese dioxide as four raw materials, and control the total weight of the mixture to about 50 grams. After 50 grams of the mixture were mixed by ball milling, they were put into a corundum crucible, and then the crucible was put into a high-temperature electric furnace. Precisely control the heating rate, control the decomposition reaction rate of the compound raw materials, prevent the mixture from overflowing from the cr...

Embodiment 2

[0038] Lithium oxide, carbonate containing aluminum (Al) or gallium (Ga), germanium carbonate and manganese carbonate are selected as starting materials, according to the element molar ratio Li:R:Ge:Mn=1:1:(2-x) : x, four raw materials are accurately weighed respectively, where 0.001≤x≤0.1, and R is expressed as: aluminum (Al) or gallium (Ga). The total weight of the control mixture is about 50 grams. After 50 grams of the mixture were mixed by ball milling, they were put into a corundum crucible, and then the crucible was put into a high-temperature electric furnace. Precisely control the heating rate, control the decomposition reaction rate of the compound raw materials, prevent the mixture from overflowing from the crucible, and pre-fire the sample at 500 ° C for 5 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 850°C for 5 hours, and cool it to room temperature with the furnace, then you can get the chemical composition of ...

Embodiment 3

[0040] Lithium nitrate, chloride containing aluminum (Al) or gallium (Ga), germanium carbonate and manganese carbonate are selected as starting materials, according to the element molar ratio Li:R:Ge:Mn=1:1:(2-x): x, four kinds of raw materials are accurately weighed respectively, wherein 0.001≤x≤0.1, R is expressed as: aluminum (Al) or gallium (Ga), and the total weight of the mixture is controlled to be about 50 grams. After 50 grams of the mixture were mixed by ball milling, they were put into a corundum crucible, and then the crucible was put into a high-temperature electric furnace. Precisely control the heating rate, control the decomposition reaction rate of the compound raw materials, prevent the mixture from overflowing from the crucible, and pre-fire the sample at 400 ° C for 5 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 1000°C for 3 hours, and cool it to room temperature with the furnace, then you can get the chem...

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Abstract

The invention provides a novel tetravalent manganese ion-doped germanic acid (aluminum or gallium) lithium red fluorescent material and a preparation method thereof. The red fluorescent material has a hexagonal crystal structure, a molecular formula of LiRGe2-xO6:xMn4+, and R is expressed as: Aluminum (Al) and gallium (Ga): Accurately weigh the compound raw materials containing lithium, the compound raw materials containing aluminum (Al) or gallium (Ga), the compound raw materials containing germanium and the compound raw materials containing manganese, and grind and mix Finally, control the temperature at 450-600°C and pre-fire for 3-5 hours; take out the pre-fired samples, grind and mix them again, and then burn them in the air at high temperature for 3-6 hours, control the temperature at 850-1000°C, and then Furnace cooled to room temperature, can be prepared.

Description

technical field [0001] The invention relates to the field of red fluorescent materials, in particular to a tetravalent manganese ion-doped germanic acid (aluminum or gallium) lithium red fluorescent material and a preparation method thereof. Background technique [0002] With the breakthrough and industrialization of blue gallium nitride and long-wave ultraviolet laser diode (LED) technology, solid-state lighting source has attracted people's interest again. In the lighting industry, white LEDs have many obvious advantages over traditional incandescent and fluorescent lamps. For example: white light LED only needs 10% of the energy consumption of incandescent lamps and 50% of fluorescent lamps in theory, and its service life is 10 times that of fluorescent lamps and 100 times that of incandescent lamps. LED light sources have no radiation such as ultraviolet and infrared light, and no fluorescent tubes are broken. Secondary pollution of spilled mercury, etc. At present, de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66
Inventor 曹人平罗文杰熊卿强余晓光
Owner JINGGANGSHAN UNIVERSITY
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