Semitransparent fluorescent powder/glass composite luminescent ceramic wafer and preparation method thereof

A technology for luminescent ceramics and phosphors, applied in the field of ceramic manufacturing technology, can solve problems such as affecting the service life of devices and easy aging, and achieve the effects of reducing equipment investment, improving lighting time and brightness, and reducing process difficulty.

Active Publication Date: 2014-12-10
厦门百嘉祥微晶材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under complex outdoor conditions (long-term sun exposure, ultraviolet rays, acid rain, hail, bird feces acid-base corrosion) or long-term

Method used

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  • Semitransparent fluorescent powder/glass composite luminescent ceramic wafer and preparation method thereof
  • Semitransparent fluorescent powder/glass composite luminescent ceramic wafer and preparation method thereof
  • Semitransparent fluorescent powder/glass composite luminescent ceramic wafer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0069] Example one

[0070] The low-melting glass is made up according to the following table 1, mixed evenly and then melted at a temperature of 1000°C, kept for 120 minutes, and crushed with a ball mill after melting. The refractive index of low-melting glass powder made according to the formula of Table 1(1) is 1.8, figure 1 The percentage of thermal expansion system and the temperature chart measured the softening temperature of 413℃.

[0071] Table 1 Low melting point glass ratio (Wt.%)

[0072]

Example Embodiment

[0073] Example two

[0074] The 85wt.% YAG: Ce phosphor (Y 3 Al 5 O 12 : Ce, model PAM YY4425, D 50 =20μm) and 15wt.% low melting glass powder (D 50 =10μm) After mixing uniformly, 5wt.% PVB binder is added to make granulated powder of 80-60 mesh, and a luminescent ceramic chip body with corresponding shape is made by a press.

[0075] Put the luminescent ceramic chip body into a sintering furnace, set the debinding zone (300-350°C) to run for 3-4 hours and the sintering zone (400°C) to run for 1.5 hours to make the luminescent ceramic chip.

[0076] Under 365nm excitation light, its emission spectrum is as figure 2 (Set the YAG phosphor content 85wt.% and the intensity of the luminescent film made of epoxy resin to 1); the thickness of the luminescent ceramic sheet is 0.6mm, and the transmittance> 20%.

Example Embodiment

[0077] Example three

[0078] Add 50wt.% long afterglow phosphor (SrAl 2 O 4 :Eu) and 50wt.% low melting glass powder (D 50 =10μm)) After mixing uniformly, 0.5wt.% PVB binder is added to make granulated powder of 80-100 mesh, which is pressed into a luminescent ceramic chip body with corresponding shape by using a press.

[0079] Put the luminescent ceramic chip body into a sintering furnace, set the debinding zone (350-395℃) to run for 2-3 hours, and the sintering zone (410°C) to run for 1 hour to make a long afterglow luminescent ceramic chip. Under 450nm excitation light, Its emission spectrum is as image 3 .

[0080] Expose the long afterglow luminescent ceramic sheet to sunlight for 5 minutes, and test its attenuation within 30 minutes to obtain Figure 4 The curve shown.

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Abstract

The invention relates to a semitransparent fluorescent powder/glass composite luminescent ceramic wafer and a preparation method thereof. The semitransparent fluorescent powder/glass composite luminescent ceramic wafer is obtained by carrying out 'pelletizing, compression moulding and sintering' on fluorescent powder and low-melting-point glass powder, wherein content of the fluorescent powder is 30-85wt%, and the content of the low-melting-point glass powder is 70-15wt%. The preparation method of the semitransparent fluorescent powder/glass composite luminescent ceramic wafer comprises the following steps: firstly, uniformly mixing fluorescent powder with glass powder in certain proportion, and adding a binding agent required by pelletizing and demoulding, so that pelletized powder of 60-100 meshes is obtained; secondly, carrying out compression moulding on the obtained pelletized powder by virtue of a mould, so that a green body of a certain shape is obtained; thirdly, carrying out heat treatment, namely carrying out glue drainage on the green body for 2-4 hours at the temperature of 300-395 DEG C, and sintering for 1-2 hours at the temperature of 395-410 DEG C, wherein the whole heat treatment process is carried out in the air atmosphere; and finally the fluorescent powder/glass composite luminescent ceramic wafer is obtained.

Description

technical field [0001] The invention belongs to a ceramic manufacturing process, and relates to a fluorescent powder / glass composite luminescent ceramic sheet produced by a "granulation-molding-sintering method". Background technique [0002] At present, various types of phosphors are widely used in various fields of the national economy, such as phosphors with cerium yttrium aluminum garnet structure in the field of indoor LED lighting (YAG: Ce phosphors, chemical formula Y 3 Al 5 o 12 : Ce) and nitride red phosphor, etc., green silicate phosphor for backlight, etc. [0003] Phosphor powders are mostly inorganic non-metallic materials, and are mostly made of powder particles with a certain particle size distribution. They are not sticky. If they need to be made into specific shapes or adhere to other materials (substrates), other Material fit. For example, it is widely used in white LED lighting solutions: YAG:Ce phosphor is dispersed in epoxy resin (a type of polymer m...

Claims

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Application Information

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IPC IPC(8): C04B35/622C03C12/00
Inventor 杜振波范尚青刘燕华郝向飞
Owner 厦门百嘉祥微晶材料科技股份有限公司
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