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Manganese doped composite aluminate red luminescent material as well as preparation method and purpose thereof

A composite aluminate, red luminescence technology, applied in the field of luminescent material preparation, can solve the problems of harsh synthesis conditions, high preparation cost, poor thermal stability of red phosphors, etc., achieves simple preparation method, improved color rendering index, and preparation method Mature and feasible effect

Inactive Publication Date: 2019-03-29
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis method of these nitrides or fluorides generally adopts hydrothermal method or ion exchange method, the synthesis conditions are very harsh, the preparation cost is high, and the thermal stability of the red phosphor is poor.

Method used

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  • Manganese doped composite aluminate red luminescent material as well as preparation method and purpose thereof
  • Manganese doped composite aluminate red luminescent material as well as preparation method and purpose thereof
  • Manganese doped composite aluminate red luminescent material as well as preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 prepares Mg 4 Al 14 o 25 Luminescent material

[0045] According to the general chemical formula Mg 4 Al 14 o 25 :xMn 4+ (x=0) each reactant required by weighing, the raw material is: MgO or MgCO 3 One or a mixture of two, Al 2 o 3 or Al 2 (CO 3 ) 3 one or a mixture of both. Put the required raw materials in an oven to fully dry, add a certain amount of absolute ethanol, the ratio of the volume of absolute ethanol to the mass of all reactants is 1-2mL: 1g, in order to make the reaction fully, add 5-10% by weight to the raw materials Ratio of co-solvent H 3 BO 3 . Then grind and mix evenly, place the obtained grinding mixture in a muffle furnace, first burn it for the first time, the burning temperature is 400°C, and the time is 0.5-2 hours, after cooling, grind and pulverize the obtained material; Put it back in the muffle furnace for the second burning, the temperature of the second burning is 1100-1800 ° C, and the time is 2-10 hours to ob...

Embodiment 2

[0046] Embodiment 2 prepares Mg 4 Al 14 o 25 :0.005Mn 4+ Luminescent material

[0047] According to the general chemical formula Mg 4 Al 14 o 25 :xMn 4+ (x=0.005) each reactant needed by weighing, raw material is: MgO or MgCO 3 One or a mixture of two, Al 2 o 3 or Al 2 (CO 3 ) 3 One or a mixture of two, MnO 2 , Mn(CO 3 ) 2 or Mn(NO 3 ) 2 one or a mixture of several. Put the required raw materials in an oven to fully dry, add a certain amount of absolute ethanol, the ratio of the volume of absolute ethanol to the mass of all reactants is 1-2mL: 1g, in order to make the reaction fully, add 5-10% by weight to the raw materials Ratio of co-solvent H 3 BO 3 . Then grind and mix evenly, place the obtained grinding mixture in a muffle furnace, first burn it for the first time, the burning temperature is 400°C, and the time is 0.5-2 hours, after cooling, grind and pulverize the obtained material; Put it back in the muffle furnace for the second burning, the tempe...

Embodiment 3

[0049] Embodiment 3 prepares Mg 4 Al 14 o 25 :xMn 4+ Luminescent material

[0050] The preparation method is the same as in Example 2, the difference is that the weight is based on Mg 4 Al 14 o 25 :xMn 4+ (x=0.002, 0.004, 0.006, 0.008, 0.015, 0.02), respectively prepared composite aluminate red luminescent materials with different manganese content.

[0051] Carry out XRD analysis to the product when x=0.02 in embodiment 1, embodiment 2 and embodiment 3, see image 3 ,From image 3 It can be seen that the material obtained by our synthesis and the standard Mg 4 Al 14 o 25 The diffraction peaks are in good agreement, indicating that the synthesis of single-phase Mg 4 Al 14 o 25 Phosphor. It was identified as Mn by XRD analysis 4+ Doped with Mg 4 Al 14 o 25 Single crystal powder, the crystal belongs to the orthorhombic crystal system, and the unit cell parameters are α=β=γ=90°.

[0052] Relationship Between Fluorescence Emission Spectral Intensity and Dop...

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Abstract

The invention relates to a manganese doped composite aluminate red luminescent material as well as a preparation method and a purpose thereof. The chemical general formula of the manganese doped composite aluminate red luminescent material is M4Al14O25:xMn<4+>, wherein M is one or a combination of several of Mg, Ca, Sr, Ba, Cu and Zn; x is a mole fraction, being equal to 0 to 2.00 percent. The manganese doped composite aluminate red luminescent material has high thermal stability, is suitable for ultraviolet light or blue light chip excitation and is hopeful to be used as a red luminescent material to be applied to white light LEDs of an ultraviolet chip for excitation trichromatic luminescent material; wide application potentiality is realized in the fields of solid state lighting, display and the like.

Description

technical field [0001] The invention relates to the field of luminescent material preparation, in particular to a manganese-doped composite aluminate red luminescent material and its preparation method and application. Background technique [0002] A light emitting diode (LED) is a semiconductor solid-state lighting element. Because LED has the advantages of high luminous efficiency, low working voltage, energy saving, long life, and no pollution, LED is used as a new type of green and environmentally friendly solid lighting source in fields such as electronic equipment backlight, household lighting, automotive lights, and display panels. has become increasingly common. [0003] At present, the realization of commercial white LED is mainly through the yellow phosphor Y 3 al 5 o 12 : Ce 3+ Combination type of (YAG) and Blu-ray chip. This method has the advantages of being simple, suitable for large-scale industrial production, and having high luminous efficiency. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64H01L33/50
CPCC09K11/643H01L33/502Y02B20/00
Inventor 熊飞兵朱文章沈汉鑫陈浩刘诗娴姚志辉
Owner XIAMEN UNIV OF TECH
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