Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF24 Cites 32 Cited by
  • 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 high temperature, there are problems such as easy aging of luminescent resin sheets, which will seriously affect Device lifetime using this scheme

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Embodiment 1

[0070] The low-melting point glass is formulated as shown in Table 1, mixed evenly and melted at a temperature of 1000°C, kept for 120 minutes, and pulverized with a ball mill after melting. The low-melting-point glass powder refractive index 1.8 that is prepared by the formula of table 1 (1), press figure 1 Its softening temperature is 413°C measured from the thermal expansion coefficient percentage and temperature map.

[0071] Table 1 Proportion of low melting point glass (Wt.%)

[0072]

Embodiment 2

[0074] 85wt.% YAG: Ce phosphor (Y 3 al 5 o 12 : Ce, Model PAM YY4425, D 50 =20μm) and 15wt.% low melting point glass powder (D 50 = 10 μm) and mix evenly, add 5wt.% PVB binder to make 80-60 mesh granulated powder, and use a press to make a luminous ceramic sheet green body with a corresponding shape.

[0075] Put the green body of the luminescent ceramic sheet into the sintering furnace, set the debinding area (300-350°C) to run for 3-4h, and the sintering area (400°C) to run for 1.5h to make the luminescent ceramic sheet.

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

Embodiment 3

[0078] 50wt.% long afterglow phosphor (SrAl 2 o 4 :Eu) and 50wt.% low melting point glass powder (D 50 =10 μm)) After mixing evenly, add 0.5wt.% PVB binder to make 80-100 mesh granulated powder, and use a press to press into a luminous ceramic sheet green body with a corresponding shape.

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

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com