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A kind of orange-yellow nitride fluorescent material and preparation method thereof

A technology of fluorescent materials and nitrides, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of difficult to meet the requirements of general lighting, severe light decay at high temperature, low color rendering index, etc., and achieve high thermal stability and chemical stability. , The effect of high luminous intensity and high light conversion efficiency

Inactive Publication Date: 2015-10-14
XIAMEN TOPSTAR NEW MATERIALS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] At present, the most widely used WLEDs technology in the world is the use of yellow phosphors (such as the patented technology of Nichia Chemical Corporation (Y 1-a Gd a ) 3 (Al 1-b Ga b ) 5 o 12 : Ce 3+ , referred to as YAG:Ce) combined with blue LED chips, although this method can obtain high-efficiency white LED light sources, but due to the lack of red components, the light source has low color rendering index and high color temperature (>5500K ) and severe light decay at high temperature, it is difficult to meet the needs of general lighting "warm white light"

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  • A kind of orange-yellow nitride fluorescent material and preparation method thereof
  • A kind of orange-yellow nitride fluorescent material and preparation method thereof
  • A kind of orange-yellow nitride fluorescent material and preparation method thereof

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Embodiment 1

[0028] According to the chemical formula Ca 1.4 Si 9.2 al 2.8 N 16 :Eu 2+ Composition Weigh 0.1392gCa 3 N 2 , 0.2422gAlN, 0.6122gSi 3 N 4 and 0.0148gEuCl 3 , Grind for 30-60min to make the raw materials mix evenly. 2 in a protected glove box. Put the mixed sample in a boron nitride crucible, and quickly transfer it to a high-temperature, high-vacuum pressure sintering furnace, and wait until the furnace is pumped into a high vacuum (~1.33×10 -1 ), filled with working gas high-purity N 2 (≥99.999%), the N charged in the initial stage of heating (room temperature) 2 The pressure is about 0.5MPa. When the temperature rises to the target temperature of 1750°C, the gas pressure in the furnace is kept at about 1MPa, and the holding time is 4 hours. The temperature rise rate is 10°C / min from room temperature to 1000°C, and 5°C / min from 1000°C to 1750°C; the temperature drop rate is 5°C / min from high temperature to 500°C, and the furnace cools below 500°C. The obtained p...

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Abstract

The invention discloses a fluorescent material of orange-yellow nitride and a preparation method of the fluorescent material. The fluorescent material is characterized by having the chemical formula MxSi12-2xAl2Xn16:D, wherein M is one or more selected from Li, Ca, Mg and Y, D is one or more selected from Mn, Ce, Pr, Eu, Sm, Nd, Ga, Tb, Dy, Ho, Er, Tm, Yb and Lu, and 0.5<=x<=1.8. The preparation method comprises the steps of calculating and weighing all raw materials according to the ratio of all elements in the chemical formula; mixing the raw materials in a glove box; heating the mixture to 1600-2000 DEG C in the atmosphere of nitrogen and under the pressure of 1Mpa; roasting for 4-8h; cooling to room temperature along with a furnace.

Description

technical field [0001] The invention relates to a fluorescent material used for photoluminescence in semiconductor lighting and a preparation method thereof. Background technique [0002] Traditional lighting sources include incandescent and fluorescent lamps. The first to popularize were incandescent lamps, which were largely replaced by fluorescent lamps because of their efficiency. However, as far as fluorescent lamps are concerned, they are not friendly to the environment because they contain a small amount of Hg; at the same time, these traditional light sources have relatively low energy efficiency and relatively short lifespan, which is not conducive to the development of energy-saving economy. Since the breakthrough of GaN-based blue light-emitting diode (LED) technology at the end of the last century, LED applications have developed from the display field to backlighting, decorative lighting, traffic signal lighting, and have begun to enter general lighting applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/80
Inventor 赵争妍陈友三魏岚吴泉生王闯杨志刚王育华
Owner XIAMEN TOPSTAR NEW MATERIALS