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A kind of red fluorescent material and synthetic method for solid-state lighting LED

A red fluorescent and solid-state lighting technology, applied in the field of red fluorescent materials, can solve the problems of unsatisfactory applicability of solid-state lighting LEDs, and achieve the effects of good thermal quenching resistance, high fluorescence intensity, and excellent performance

Inactive Publication Date: 2019-06-28
JINGGANGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, Mn 4+ There have been many reports on ion-doped oxides, but Mn 4+ Practical applications of ionic oxides in solid-state lighting LEDs are not yet ideal

Method used

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  • A kind of red fluorescent material and synthetic method for solid-state lighting LED
  • A kind of red fluorescent material and synthetic method for solid-state lighting LED
  • A kind of red fluorescent material and synthetic method for solid-state lighting LED

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Experimental program
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Effect test

Embodiment 1

[0033] Select magnesium-containing compounds, lanthanum-containing compounds, tin-containing compounds and manganese-containing compounds as starting materials, according to the element molar ratio Mg: La: Sn: Mn = 2: 2: (1-x): x, accurately weigh the four Raw materials, where x is 0.001, 0.003, 0.006, 0.009, 0.012, 0.015, 0.018, 0.021, 0.04, 0.06, 0.08, 0.1. Weigh four chemical raw materials, magnesium carbonate, lanthanum oxide, tin oxide and manganese dioxide, respectively, and control the total weight of the mixture to be about 20 grams. After mixing 20 grams of the mixture by ball milling, it is put into the corundum crucible, and then the crucible is put into the high-temperature electric furnace. Accurately control the heating rate, control the decomposition reaction speed of the compound material, and prevent the mixture from overflowing from the crucible. The sample is pre-fired at 450°C for 15 hours. Take out the pre-fired sample, grind and mix it again, put it in a ...

Embodiment 2

[0036] Select magnesium oxide, lanthanum nitrate, tin chloride, and manganese carbonate chemicals as starting materials, according to the element molar ratio Mg:La:Sn:Mn=2:2:(1–x):x, accurately weigh the four materials , Where 0.001≤x≤0.1. Control the total weight of the mixture to about 20 grams. After mixing 20 grams of the mixture by ball milling, it is put into the corundum crucible, and then the crucible is put into the high-temperature electric furnace. Accurately control the heating rate, control the decomposition reaction speed of the compound raw materials, and prevent the mixture from overflowing from the crucible. The sample is pre-fired at 500°C for 12 hours. Take out the pre-fired sample, grind and mix it again, put it in a crucible, burn it at 1450°C for 17 hours, and cool it down to room temperature with the furnace to obtain tetravalent manganese ion-doped magnesium lanthanum stannate (Mg 2 La 2 SnO 7 :Mn 4+ ) Red fluorescent material. X-ray diffraction analys...

Embodiment 3

[0038] Select magnesium nitrate, lanthanum oxide, tin oxalate, and manganese dioxide chemicals as starting materials. According to the element molar ratio Mg:La:Sn:Mn=2:2:(1–x):x, accurately weigh the four materials , Where 0.001≤x≤0.1, the total weight of the mixture is controlled to be about 20 grams. After mixing 20 grams of the mixture by ball milling, it is put into the corundum crucible, and then the crucible is put into the high-temperature electric furnace. Accurately control the heating rate, control the decomposition reaction speed of the compound material, and prevent the mixture from overflowing from the crucible. The sample is pre-fired at 550°C for 8 hours. Take out the pre-fired sample, grind and mix it again, put it in a crucible, burn it at 1400°C for 18 hours, and cool it down to room temperature with the furnace to obtain tetravalent manganese ion-doped magnesium lanthanum stannate (Mg 2 La 2 SnO 7 :Mn 4+ ) Red fluorescent material. X-ray diffraction analysi...

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Abstract

The invention provides a red fluorescence material for solid-state lighting LED and a synthesis method. The phosphor is tetravalent manganese ion doped magnesium lanthanum stannate, the chemical molecular formula is Mg2La2SnO7:Mn<4+>, wherein Mg:La:Sn:Mn=2:2:(1-x):x, and x is greater than or equal to 0.001 and smaller than or equal to 0.1. The invention also discloses a synthesis method of the phosphor, and the method includes: accurately weighing compounds containing magnesium, lanthanum, tin and manganese as the raw materials, grinding and mixing the materials evenly, then controlling the temperature at 450-650DEG C in the air, performing presintering for 5-15h, then grinding and mixing the presintered sample evenly again, controlling the temperature at 1300-1500DEG C in the air, performing calcinations for 10-20h, and conducting cooling to room temperature, thus obtaining the tetravalent manganese ion doped magnesium lanthanum stannate. The phosphor provided by the invention has absorption capacity in the 230-580nm region, and can efficiently convert ultraviolet and blue light into red light in the 640-780nm region, has a luminescence center at 706nm, and has potential application prospects in solid-state lighting LED.

Description

Technical field [0001] The invention relates to the field of red fluorescent materials, in particular to a tetravalent manganese ion doped lanthanum magnesium stannate fluorescent material for solid-state lighting LEDs and a synthesis method thereof. Background technique [0002] As the fourth-generation new solid-state lighting source, LED has many characteristics and obvious advantages that are different from other electric light sources, such as long life (in theory 10 times that of fluorescent lamps and 100 times that of incandescent lamps), environmental protection (no mercury and other toxic substances) ), energy saving and environmental protection (theoretically only need 10% of the energy consumption of incandescent lamps and 50% of fluorescent lamps), sturdiness, small size, easy to design a variety of products, no ultraviolet and infrared radiation, and safe driving power, which makes it The first choice for energy-saving and environmentally friendly light sources. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7701H01L33/502
Inventor 曹人平程鑫雨苏蕾任永春陈涛肖辉张发林
Owner JINGGANGSHAN UNIVERSITY
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