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A tetravalent manganese ion doped magnesium lithium niobate red fluorescent material and preparation method thereof

A technology of red fluorescence and ion doping, which is applied in the field of red fluorescent materials, can solve the problems such as the unsatisfactory applicability of ion-doped red phosphors, and achieve good thermal quenching resistance, good thermal stability, and excellent performance. Effect

Inactive Publication Date: 2017-06-13
JINGGANGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the reported Mn 4+ The practical application of ion-doped red phosphors in LED plant growth lamps is not very ideal, so in order to obtain qualified red LED plant growth lamps, research on new Mn 4+ Ion-doped red phosphors have special significance

Method used

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  • A tetravalent manganese ion doped magnesium lithium niobate red fluorescent material and preparation method thereof
  • A tetravalent manganese ion doped magnesium lithium niobate red fluorescent material and preparation method thereof
  • A tetravalent manganese ion doped magnesium lithium niobate red fluorescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Select raw materials containing lithium compounds, raw materials containing magnesium compounds, raw materials containing niobium compounds and raw materials containing manganese compounds as starting materials, according to the molar ratio of elements Li: Mg: Nb: Mn = 3: 2: (1 - x): x, respectively Accurately weigh the four raw materials, where x is 0.001, 0.002, 0.004, 0.006, 0.008, 0.01, 0.012, 0.02, 0.04, 0.06, 0.08, 0.1 respectively. Four chemical raw materials of lithium carbonate, magnesium oxide, niobium oxide and manganese dioxide were weighed respectively, and the total weight of the mixture was controlled to be about 20 grams. After 20 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 p...

Embodiment 2

[0040] Lithium oxide, magnesium carbonate, niobium carbonate, and manganese carbonate chemicals are selected as starting materials, and the four raw materials are accurately weighed according to the element molar ratio Li:Mg:Nb:Mn = 3:2:(1 - x):x , where 0.001 ≤ x ≤ 0.1. The total weight of the control mixture is about 20 grams. After 20 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 8 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 1150°C for 10 hours, and cool it to room temperature with the furnace to prepare a new type of tetravalent manganese ion-doped magnesium lithium niobate (Li 3 Mg 2 NbO 6 :Mn 4+ ) red f...

Embodiment 3

[0042] Lithium nitrate, magnesium chloride, germanium carbonate, and manganese carbonate chemicals are selected as starting materials, and the four raw materials are accurately weighed according to the element molar ratio Li:Mg:Nb:Mn = 3:2:(1-x):x, Wherein 0.001 ≤ x ≤ 0.1, the total weight of the control mixture is about 20 grams. After 20 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 10 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 1050 ° C for 15 hours, and cool it to room temperature with the furnace, you can prepare a new type of tetravalent manganese ion doped magnesium lithium niobate (Li 3 Mg 2 NbO 6 :Mn ...

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Abstract

The invention discloses a quadrivalence manganese ion doped magnesium-lithium diniobate red fluorescence material and a preparation method thereof. The crystal structure of the red fluorescence material is an orthorhombic crystal system. The expression general formula is Li3Mg2NbO6:Mn4+, active ions are Mn4+ ions, and the ratio of Li to Mg to Nb to Mn is 3:2:(1-x):x, wherein x is larger than or equal to 0.001 and smaller than or equal to 0.1. The preparation method comprises the steps that compound raw materials containing lithium, magnesium, niobium and manganese are weighed respectively, high-temperature burning is performed for 5-20 h after grinding and mixing, the temperature is controlled to be 1000 DEG C to 1250 DEG C, furnace cooling is performed to the room temperature, and the quadrivalence manganese ion doped magnesium-lithium diniobate red fluorescence material can be obtained. The red fluorescence material has wide ultraviolet and blue light absorption range, can efficiently convert ultraviolet and blue light into red light, the light-emitting center is about 670 nm, the red light wavelength range is in the 600-780 nm spectral region, the fluorescent lifetime is long, the requirement for preparation equipment and technological conditions is low, and the quadrivalence manganese ion doped magnesium-lithium diniobate red fluorescence material can be applied in white-light LED illumination and plant growth red LED lamps.

Description

technical field [0001] The invention relates to the field of red fluorescent materials, in particular to a tetravalent manganese ion-doped magnesium lithium niobate red fluorescent material and a preparation method thereof. Background technique [0002] As the fourth-generation new lighting source, LED has many characteristics different from other electric light sources (energy saving, environmental protection, non-toxic, long life, etc.), which also makes it the first choice for energy-saving and environmentally friendly light sources. LED plant growth lamp is a kind of plant lamp. It uses LED (light-emitting diode) as the light source. According to the law of plant growth, sunlight must be needed. It uses light instead of sunlight to provide a lighting environment for plant growth and development. LEDs used in the field of plant cultivation also exhibit the following characteristics: rich wavelength types, just in line with the spectral range of plant photosynthesis and ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67
CPCC09K11/671
Inventor 曹人平石智慧权冠军王无敌胡强林
Owner JINGGANGSHAN UNIVERSITY
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