Blue luminescent material for energy saving lamp and preparation method thereof
A technology for blue luminescent materials and energy-saving lamps, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of shortened service life, color parameter shift, BAM degradation, etc., and achieve good thermal stability and good microscopic appearance. , the effect of high luminous intensity
Inactive Publication Date: 2014-08-27
XIAMEN TOPSTAR NEW MATERIALS
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Problems solved by technology
However, BAM phosphors still have a serious problem of luminous performance degradation in practical applications, resulting in the reduction of the luminous efficiency and performance of the application object and the shortening of the service life.
In the production process of energy-saving lamps, it is necessary to coat and bake at 450-650°C. During this process, the attenuation of BAM's luminous intensity is as high as 30%, and at the same time, the y value of its color coordinates changes significantly, resulting in energy-saving lamps. luminous flux and lifetime reduction
At the same time, among the three primary color phosphors, the green powder has slight thermal degradation, the red powder basically does not have the problem of thermal degradation, and the BAM has the most serious degradation phenomenon, which leads to the deviation of the color parameters and the easy occurrence of chromatic aberration after the lamp is made. And other issues
However, because the blue powder of the BAM system has excellent properties such as high quantum efficiency and good color purity, in practical applications, there is currently no new type of luminescent material that can replace the important position of the BAM system in the application field.
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preparation example Construction
[0045] Among a preferred embodiment: a method for preparing a blue luminescent material for an energy-saving lamp, comprising:
[0046] Step 1, prepare Ba s1 Eu s2 Mg s3 mn s4 Al 10+s5 o 17+s6 The required raw materials, in this embodiment, weigh barium salt, magnesium oxide, aluminum oxide, europium oxide and manganese carbonate according to the stoichiometric ratio, and add flux lithium fluoride, magnesium fluoride, aluminum fluoride, fluoride At least one of sodium, potassium fluoride, lithium carbonate, sodium carbonate, potassium carbonate and ammonium carbonate, ammonium bicarbonate, ammonium fluoride, ammonium chloride;
[0047] Step 2, grind the raw materials to the micron level and mix them evenly;
[0048] Step 3, performing calcination and reduction in a reducing atmosphere under the condition of 1400°C to 1550°C;
[0049] Step 4, cooling the reduced product, and then grinding to below 200 mesh.
[0050] In this embodiment, the barium salt is selected: such ...
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Abstract
The invention discloses a blue luminescent material for an energy saving lamp and a preparation method thereof. The blue luminescent material employs fluxing agents selected form one or more than two of fluoride, carbonate or ammonium salt, and has a molecular formula of BaslEus2Mgs3Mns4Al10+s5O17+s6. According to relative tests, the material of the present invention has good microscopic morphology, high luminescence intensity and good heat stability compared with a material of prior art, and is a blue luminescent material with wide application prospects.
Description
technical field [0001] The invention relates to a blue luminescent material for an energy-saving lamp and a preparation method thereof, in particular to a blue luminescent material for an energy-saving lamp with high brightness and low deterioration and a preparation method thereof. Background technique [0002] Energy-saving lamps are currently the most important indoor lighting source. BaMgAl 10 o 17 :Eu 2+ and BaMgAl 10 o 17 :Eu 2+ , Mn 2+ (BAM) is currently the preferred blue luminescent material in energy-saving lamps. However, there is still a serious problem of degradation of luminous performance of BAM phosphors in practical applications, resulting in the reduction of luminous efficiency and performance of its application objects and the shortening of service life. In the production process of energy-saving lamps, it is necessary to coat and bake at 450-650°C. During this process, the attenuation of BAM's luminous intensity is as high as 30%, and at the same ...
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IPC IPC(8): C09K11/80
Inventor 陈友三魏岚戴茜玲张稚雅王文杰王育华
Owner XIAMEN TOPSTAR NEW MATERIALS