Fluorescent material of orange-yellow nitride and preparation method of fluorescent material
A technology of fluorescent materials and nitrides, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that are difficult to meet the requirements of ordinary lighting, serious light decay at high temperature, low color rendering index, etc., and achieve high thermal and chemical stability , High luminous intensity, high light conversion efficiency
Inactive Publication Date: 2014-06-18
XIAMEN TOPSTAR NEW MATERIALS
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[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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[0028] According to the chemical formula Ca 1.4 Si 9.2 Al 2.8 N 16 :Eu 2+ Composition weighed 0.1392gCa 3 N 2 , 0.2422gAlN, 0.6122gSi 3 N 4 And 0.0148gEuCl 3 , Grinding for 30-60min, so that the raw materials are mixed uniformly, the whole weighing, grinding and mixing process is in high purity N 2 Carried out in a protective glove box. Put the mixed sample in a boron nitride crucible, and quickly transfer it to a high temperature and high vacuum pressure sintering furnace, and wait until the furnace is evacuated to a high vacuum (~1.33×10 -1 ), then fill the working gas with high purity N 2 (≥99.999%), 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 maintained at about 1 MPa, and the holding time is 4 hours. The heating rate is 10°C / min for the section from room temperature to 1000°C, and 5°C / min for the section from 1000°C to 1750°C; t...
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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 lamps and fluorescent lamps. Incandescent lamps were the first to become popular, which were largely replaced by fluorescent lamps because of their effectiveness. 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 life span, which is not conducive to the development of energy-saving economy. Since the end of last century, after the breakthrough of GaN-based blue light-emitting diode (LED) technology, LED applications have developed from the display field to backlighting, decorative lighting, traffic signal lighting, and have begun to enter general lightin...
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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