Long-afterglow white luminescent ceramic and preparation method thereof
A white luminescence and long afterglow technology, applied in luminescent materials, chemical instruments and methods, clay products, etc., can solve the problems of low afterglow brightness, changes in afterglow light color, etc., and achieve the effect of simple steps and low preparation process cost.
Active Publication Date: 2021-07-13
XUZHOU NORMAL UNIVERSITY
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[0006] The purpose of the present invention is to provide a preparation method of long-lasting white luminescent ceramics, which can effectively avoid the problems of low afterglow brightness and color change of afterglow in existing white long-lasting products
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[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] The long afterglow white luminous ceramics prepared in this example, its precursor material is high borosilicate glass powder (particle size 50-100 μm), CaAl 2 o 4 :Eu 2+ ,Nd 3+ Long afterglow blue luminescent powder (particle size 130-200μm), YAG:Ce yellow phosphor powder (particle size 30-80μm), organic binder using methyl cellulose. Its production process is as follows:
[0028] S1. Mix high borosilicate glass powder and CaAl through a V-type mixer 2 o 4 :Eu 2+ ,Nd 3+ The long afterglow blue luminescent powder is mixed and mixed with an organic binder to obtain a mixture A, in which CaAl 2 o 4 :Eu 2+ ,Nd 3+ The long-lasting blue luminescent powder accounts for 20% of the mass fraction of the mixture A, and the organic binder accounts for 0.3% of the mass fraction of the mixture A; in addition, the high borosilicat...
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Abstract
The invention discloses a long-afterglow white luminescent ceramic and a preparation method thereof. The method comprises the steps: matrix powder and long-afterglow blue luminescent powder are mixed, an organic binder is doped to obtain a mixture A; the matrix powder and yellow fluorescent powder are mixed to obtain a mixture B; a mold is uniformly filled with the mixture A, and tabletting molding is performed to obtain a blue ceramic matrix; the mixed material B is arranged on the surface of the blue ceramic matrix in a dry silk-screen mode, the mixed material B is naturally stacked into a grid shape, then dry pressing is conducted again, and the surface is flattened; and sintering is performed to obtain the long-afterglow white luminescent ceramic. On the premise of effectively maintaining the afterglow time and brightness of the blue long afterglow luminescent material, white long afterglow luminescence is realized, and the product is simple in structure, low in process cost and suitable for popularization and production.
Description
technical field [0001] The invention relates to the technical field of inorganic luminescent materials, in particular to a long-lasting white luminescent ceramic and a preparation method thereof. Background technique [0002] Long afterglow luminescent material is a kind of photoluminescent material, which can produce fluorescence under the excitation of high-energy rays, visible light, etc., and its fluorescence emission will last for several minutes to several hours after the excitation stops, which makes long afterglow luminescent functional materials in emergency Instructions, night traffic sign display, low brightness lighting, instrument night display, luminous artwork, etc. have huge applications. [0003] Since the large-scale use of sulfide long-lasting luminous materials in World War I and World War II, people have developed a large number of long-lasting luminous materials, especially the yellow-green and sky-blue luminous powder released by Nemoto Corporation of ...
Claims
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IPC IPC(8): C04B33/13C09K11/64
CPCC04B33/13C09K11/7786C04B2235/3222C04B2235/6562C04B2235/6567C04B2235/9646C04B2235/9661
Inventor 张乐陈东顺邢钰培邵岑康健李明周天元陈浩
Owner XUZHOU NORMAL UNIVERSITY