A long afterglow white luminescent ceramic and its preparation method
A white luminescence and long afterglow technology, applied in luminescent materials, chemical instruments and methods, clay products, etc., can solve the problems of afterglow light color change, low afterglow brightness, etc., and achieve the effect of simple steps and low preparation process cost.
Active Publication Date: 2022-05-24
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 further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] For the long afterglow white luminescent ceramics prepared in this example, the precursor materials are 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 (particle size 30-80μm), and methyl cellulose as organic binder. Its production process is as follows:
[0028] S1. Combine borosilicate glass powder with CaAl through V-type mixer 2 O 4 :Eu 2+ ,Nd 3+ Long afterglow blue luminescent powder is mixed and mixed with organic binder to obtain Mixture A, in which CaAl 2 O 4 :Eu 2+ ,Nd 3+ The long afterglow 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 borosilicate glass ...
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Abstract
The invention discloses a long-lasting white luminescent ceramic and a preparation method thereof. The matrix powder is mixed with the long-lasting blue luminescent powder and an organic binder is added to obtain a mixture A. The matrix powder and the yellow fluorescent The powders are mixed to obtain the mixture B, and the mixture A is evenly filled into the mold, and the tablet is formed to obtain a blue ceramic substrate; the mixture B is arranged on the surface of the blue ceramic substrate by dry silk screen printing, Mixture B is naturally stacked into a grid, and then dry pressed again to flatten the surface; sintered to obtain long-lasting white luminescent ceramics. Under the premise of effectively maintaining the afterglow time and brightness of the blue long afterglow luminescent material, the invention realizes white long afterglow luminescence, has simple product structure and low process cost, and is 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 afterglow white luminescent ceramic and a preparation method thereof. Background technique [0002] The long afterglow luminescent material is a kind of photoluminescent material, which can generate fluorescence under the excitation of high-energy rays, visible light, etc., and its fluorescence emission lasts for several minutes to several hours after the excitation is stopped, which makes the long afterglow luminescent functional material in emergency. It has huge applications in indication, night traffic sign display, low-brightness lighting, instrument night display, luminous artwork, etc. [0003] Since the widespread use of sulfide long afterglow materials in World War I and World War II, a large number of long afterglow luminescent materials have been developed, especially the yellow-green and sky-blue luminous powders released by Japan's Nemo...
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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