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Strontium-containing vanadate fluorescent powder and preparation method thereof

A strontium vanadate and phosphor technology is applied in the production and manufacturing of LED energy-saving lamps, which can solve the problems of color change, low light transmittance, and immature ultraviolet LED phosphor technology, so as to achieve easy adjustment and improve luminous efficiency. Effect

Inactive Publication Date: 2019-07-09
LONGYAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: low color rendering index, low light conversion efficiency due to its own absorption and low light transmittance, low color reproduction, and color changes with the viewing angle
However, there are problems of color reabsorption and ratio control among the three-color phosphors, which greatly affect the luminous efficiency and color reproduction performance; multi-chip LEDs can theoretically obtain white LEDs with any color temperature and high color rendering, but The forward voltage and light output of multi-chip LEDs are different, the requirements for circuit design are high, the color temperature difference between modules is large, and the technology for UV LED phosphors is not yet mature.

Method used

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  • Strontium-containing vanadate fluorescent powder and preparation method thereof
  • Strontium-containing vanadate fluorescent powder and preparation method thereof
  • Strontium-containing vanadate fluorescent powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: A method for preparing strontium-containing vanadate fluorescent powder, the steps of the method include:

[0026] Step 1: Prepare the required medicines 2 CO 3 , CaCO 3 , SrCO 3 , MgO, NH 4 VO 3 、Eu 2 o 3 ;

[0027] Step 2: Weigh 0.5 parts by weight of Li 2 CO 3 , 2 parts by weight of CaCO 3 , 1 part by weight of SrCO 3 , 1 weight part of MgO, 3 weight parts of NH 4 VO 3 , 0.03 parts by weight of Eu 2 o 3 ;

[0028] Step 3: Put the weighed medicine into a mortar, add an appropriate amount of absolute ethanol and grind it for 20 to 30 minutes to mix it evenly to obtain mixture A;

[0029] Step 4: Put the mixture A prepared in step 3 into a crucible, and place the crucible containing the mixture A in a drying oven at a temperature of 50 to 60 degrees to dry for about 15 to 20 minutes;

[0030] Step 5: Place the mixture A obtained in Step 4 in a holding furnace for 4 hours;

[0031] Step 6: After the mixture A prepared in Step 5 is naturall...

Embodiment 2

[0035] Embodiment 2: A method for preparing strontium-containing vanadate fluorescent powder, the steps of the method include:

[0036] Step 1: Prepare the required medicines 2 CO 3 , CaCO 3 , SrCO 3 , MgO, NH 4 VO 3 、Eu 2 o 3 ;

[0037] Step 2: Weigh 0.5 parts by weight of Li 2 CO 3 , 2 parts by weight of CaCO 3 , 1 part by weight of SrCO3 , 1 weight part of MgO, 3 weight parts of NH 4 VO 3 , 0.035 parts by weight of Eu 2 o 3 ;

[0038] Step 3: Put the weighed medicine into a mortar, add an appropriate amount of absolute ethanol and grind it for 20 to 30 minutes to mix it evenly to obtain mixture A;

[0039] Step 4: Put the mixture A prepared in step 3 into a crucible, and place the crucible containing the mixture A in a drying oven at a temperature of 50 to 60 degrees to dry for about 15 to 20 minutes;

[0040] Step 5: Place the mixture A obtained in Step 4 in a holding furnace for 4 hours;

[0041] Step 6: After the mixture A prepared in Step 5 is naturally...

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Abstract

The invention discloses strontium-containing vanadate fluorescent powder and a preparation method thereof. The method comprises the following steps: step 1, preparing required reagents of Li2CO3, CaCO3, SrCO3, MgO, NH4VO3 and Eu2O3; step 2, weighing 0.5 part by weight of the Li2CO3, 2 parts by weight of the CaCO3, 1 part by weight of the SrCO3, 1 part by weight of the MgO, 3 parts by weight of theNH4VO3 and 0.01-0.05 part by weight of the Eu2O3; step 3, putting the weighed reagents into a mortar, adding a proper amount of absolute ethyl alcohol, and carrying out grinding for 20-30 minutes touniformly mix the reagents to obtain a mixture A; step 4, putting the mixture A prepared in the step 3 into a crucible, placing the crucible containing the mixture A into a drying oven with a temperature of 50-60 DEG C, and carrying out drying for about 15-20 minutes; step 5, placing the mixture A obtained in the step 4 into a heat preservation furnace for preserving heat for 4 hours; and step 6,naturally cooling the mixture A obtained in the step 5 to room temperature, and then grinding the mixture A in a mortar for 10 minutes or above to prepare the fluorescent powder. According to the invention, light-emitting efficiency of light-emitting diode (LED) energy-saving lamps is greatly improved, and the light-emitting color can be easily adjusted.

Description

technical field [0001] The invention relates to the technical field of production and manufacture of LED energy-saving lamps, in particular to a fluorescent powder for manufacturing LED wicks, in particular to a strontium-containing vanadate fluorescent powder and a preparation method thereof. Background technique [0002] In the context of global energy shortage, energy conservation and environmental protection have become one of the most important concepts at present. Among them, in the field of luminous lighting, white light-emitting diodes (WLEDs), as the fourth-generation lighting source, have the advantages of low cost, high brightness, long life, and no pollution, and are the best substitutes for light sources such as incandescent lamps and fluorescent lamps. White LED has a wide range of applications and high potential research value in indoor and outdoor lighting, display panels, automobile taillights, street lights and other fields. [0003] Currently, there are t...

Claims

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Application Information

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IPC IPC(8): C09K11/69
CPCC09K11/695C09K11/7736Y02P20/10
Inventor 陈含德周江聪胡志彪郑志恒
Owner LONGYAN UNIV