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A kind of Mn ion-doped borate fluorescent material and preparation method thereof

A technology of fluorescent materials and borates, which is applied in the field of fluorescent materials, can solve problems that have not yet been applied, and achieve the effects of easy mass production, strong absorption, and low production costs

Active Publication Date: 2020-06-19
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A 7 wxya 2 B 15 o 30 (A stands for any one or a mixture of two or more of Li, Na, and K) is a class of materials whose crystal structure corresponds to a space group of R32. So far, this type of material has not been used in light-emitting materials for lighting and display.

Method used

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  • A kind of Mn ion-doped borate fluorescent material and preparation method thereof
  • A kind of Mn ion-doped borate fluorescent material and preparation method thereof
  • A kind of Mn ion-doped borate fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a kind of Mn 2+ The preparation method of the borate fluorescent material of doping, it comprises the following steps:

[0027] 1) Accurately weigh raw materials: 0.5030g of K 2 CO 3 (purity 99.8%), 0.8706g of H 3 BO 3 (purity 99.5%), 0.0760g of ZnO (purity 99%), 0.1289g of Sc 2 o 3 (purity 99.9%) and 0.0008g of MnO 2 (99% purity) (i.e. elemental molar ratio K: Zn: Sc: Mn: B = 7: 0.99: 2: 0.01: 15), then put it in an agate mortar, add a small amount of absolute ethanol, mix and grind evenly, obtain the mixture;

[0028] 2) Put the ground mixture into a 30ml crucible, put it together in a muffle furnace, and pre-fire it at 300°C for 10 hours in an air environment. After the reaction is finished and the temperature is naturally lowered to room temperature, take out the pre-fired powder and grind it evenly again, put it into a 5ml corundum crucible, and put it together in a tube furnace. 2 The sintering is carried out under a reducing atmosphere, the pressure ...

Embodiment 2

[0032] a kind of Mn 2+ The preparation method of the borate fluorescent material of doping, it comprises the following steps:

[0033] 1) Accurately weigh raw materials: 0.5030g of K2 CO 3 (purity 99.8%), 0.8706g of H 3 BO 3 (purity 99.5%), 0.0699g ZnO (purity 99%), 0.1289g Sc 2 O 3 (99.9% purity) and 0.0074g of MnO 2 (purity 99%) (that is, according to the element molar ratio K:Zn:Sc:Mn:B=7:0.91:2:0.09:15), then placed in an agate mortar, add a small amount of absolute ethanol, mix and grind evenly, to obtain mixture A;

[0034] 2) The ground mixture A was placed in a 30ml crucible, placed in a muffle furnace, and pre-fired at a temperature of 300°C for 10 hours in an air environment. After the reaction was completed and the temperature was naturally cooled to room temperature, the pre-fired powder was taken out and ground again uniformly, and put into a 5 ml corundum crucible. The pre-fired mixture A was placed in a tube furnace in a volume ratio of 95:5 N 2 wit...

Embodiment 3

[0042] a Mn 2+ A preparation method of a doped borate fluorescent material, comprising the following steps:

[0043] 1) Accurately weigh the raw materials: 0.4311g of K 2 CO 3 (purity 99.8%), 0.0379g Li 2 CO 3 (purity 99.99%), 0.8706g of H 3 BO 3 (purity 99.5%), 0.0760g ZnO (purity 99%), 0.1289g Sc 2 O 3 (99.9% purity) and 0.0008g of MnO 2 (purity 99%) (that is, according to the molar ratio of elements K: Li: Zn: Sc: Mn: B=6: 1: 0.99: 2: 0.01: 15), then placed in an agate mortar, adding a small amount of absolute ethanol, Mix and grind uniformly to obtain a mixture;

[0044] 2) The ground mixture was placed in a 30ml crucible, placed in a muffle furnace, and pre-fired at a temperature of 300°C for 10 hours in an air environment. After the reaction is finished and naturally cooled to room temperature, the pre-fired powder is taken out and ground again uniformly, put into a 5ml corundum crucible, and placed in a tube furnace together, in a volume ratio of 95:5 N 2...

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Abstract

The invention discloses a novel Mn < 2 + >-doped borate fluorescent material with an adjustable luminous color and a preparation method of the novel Mn < 2 + >-doped borate fluorescent material. The chemical formula of the fluorescent material is A7Zn1-xMnxSc2B15O30, 0 < x < = 17%, and A represents any one or a mixture of more than two of Li, Na and K. The fluorescent material has the advantages of strong absorption on ultraviolet and blue light wave bands, emission wavelength coverage of 500-800nm, light emitting color change from yellow light to red light, high light emitting efficiency andthe like. The invention further provides the preparation method of the material, the raw materials are weighed and mixed according to a certain proportion, the transition metal Mn with the price lowerthan that of rare earth elements serves as an activating agent, a solid phase method is adopted for preparation, and the method is low in production cost and easy for large-scale production. The fluorescent powder is excellent in performance, low in preparation cost and suitable for being applied to illumination of warm white light LED devices excited by ultraviolet or blue light LED chips.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, is a new type of energy material, can be applied to the technical field of energy-saving and environment-friendly LED lighting, and specifically relates to a new type of Mn 2+ Doped borate fluorescent material and preparation method thereof. Background technique [0002] With the rapid development of today's society, the development of new energy and the improvement of the utilization rate of existing energy have become the focus of attention of countries all over the world. In recent years, white light-emitting diodes (LEDs) have become a research hotspot due to their excellent light-emitting properties, low cost, and stable performance. The new white LED light source has important application value and broad market prospect because of its small size, low energy consumption, long life and no pollution. [0003] So far, the common way to obtain white light is to combine commercial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7712H01L33/502Y02B20/00
Inventor 张凤付颖李超张铮铮
Owner HENAN UNIVERSITY
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