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A method for semi-free molding of translucent yag luminescent thin ceramics

A translucent and ceramic technology, applied in the direction of lasers, semiconductor devices, phonon exciters, etc., can solve the problem of ceramic luminous efficiency, unsatisfactory transmittance, easy to form powdery shape, and difficult to control product shape and other problems, to achieve the effect of large market promotion and application prospects, good product appearance, simple and feasible production process

Active Publication Date: 2019-12-17
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to Y above 2 o 3 From the perspective of research on transparent ceramics, although some progress has been made in powder preparation and ceramic sintering, the luminous efficiency and transmittance of ceramics are not satisfactory at present, and the shape of the product is not easy to control, not agglomerated, and easy to form Problems such as products with powdery morphology need to be solved urgently

Method used

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  • A method for semi-free molding of translucent yag luminescent thin ceramics
  • A method for semi-free molding of translucent yag luminescent thin ceramics
  • A method for semi-free molding of translucent yag luminescent thin ceramics

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Preparation of translucent YAG spherical luminous ceramics

[0027] Preparation of the adhesive: Mix 1000g of styrene-acrylic emulsion and 800g of vinyl emulsion, and stir evenly to obtain the product.

[0028] Preparation of YAG phosphor: take yttrium oxide Y 2 o 3 , alumina Al 2 o 3 , CeO 2 Feed materials at a molar ratio of 3:5:0.06, grind and mix evenly, and then use a high-temperature solid-phase method to sinter in a reducing atmosphere at 1600°C to obtain YAG phosphors. The reducing atmosphere is a volume ratio of H 2 :N 2 =10:90;

[0029]Preparation of the bisque: Take the YAG phosphor prepared in the above steps, add the binder to grind and mix evenly at a temperature of 20°C, put it in a vacuum box for degassing, set the vacuum degree to -0.008Mpa, and vacuum for 3 minutes , take it out, cast it on a spherical plastic mold whose surface is covered with a thin layer of wax oil in advance, and then place it in a vacuum box for degassing, air-dr...

Embodiment 2

[0031] Example 2: Preparation of translucent YAG spherical luminous ceramics

[0032] Preparation of the adhesive: Mix 1000g of styrene-acrylic emulsion and 1200g of vinyl emulsion, stir evenly, and obtain the product.

[0033] Preparation of YAG phosphor: take yttrium oxide Y 2 o 3 , alumina Al 2 o 3 , CeO 2 Feed materials at a molar ratio of 3:5:0.06, grind and mix evenly, and then use a high-temperature solid-phase method to sinter in a reducing atmosphere at 1600°C to obtain YAG phosphors. The reducing atmosphere is a volume ratio of H 2 :N 2 =10:90;

[0034] Preparation of the bisque: Take the YAG phosphor prepared in the above steps, add the binder and grind it evenly at a temperature of 25°C, put it in a vacuum box for degassing, set the vacuum degree to -0.01Mpa, and vacuum for 5 minutes , take it out, cast it on a spherical plastic mold whose surface is covered with a thin layer of wax oil in advance, and then place it in a vacuum box for degassing, air-drying,...

Embodiment 3

[0036] Example 3: Preparation of translucent YAG spherical luminous ceramics

[0037] Preparation of the adhesive: Take 1000g of styrene-acrylic emulsion and 1000g of vinyl emulsion, mix them, and stir them evenly.

[0038] Preparation of YAG phosphor: take yttrium oxide Y 2 o 3 , alumina Al 2 o 3 , CeO 2 Feed materials at a molar ratio of 3:5:0.06, grind and mix evenly, and then use a high-temperature solid-phase method to sinter in a reducing atmosphere at 1600°C to obtain YAG phosphors. The reducing atmosphere is a volume ratio of H 2 :N 2 =10:90;

[0039] Preparation of the bisque: Take the YAG phosphor prepared in the above steps, add the binder to grind and mix evenly at a temperature of 23°C, put it in a vacuum box for degassing, set the vacuum degree to -0.006Mpa, and vacuum for 5 minutes , take it out, cast it on a spherical plastic mold whose surface is covered with a thin layer of wax oil in advance, and then place it in a vacuum box for degassing, air-drying...

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Abstract

The invention relates to a semi-free molding method of semi-transparent YAG luminescent thin ceramics. YAG fluorescent powder is prepared from raw materials including yttrium oxide Y2O3, alumina Al2O3and cerium oxide CeO2, the YAG fluorescent powder and an adhesive are ground and mixed, and then steps including vacuum degassing, casting molding, vacuum drying, low-temperature vacuum sintering degassing, sintering in a reducing atmosphere, high-temperature vacuum sintering and low-temperature annealing are realized. Thus, fluorescent ceramic products are diversified, the light transmittance ishigh and is controllable according to different demands, the raw materials are cheap and easy to obtain, production technologies are simple and feasible, the controllability is high, the period is short, the production period is about 40h, the product is good is shape, high in luminous efficiency, color rendering index and light emitting intensity, and less easy to age compared with fluorescent powder of traditional white LED, resistant to high temperature and free of color cast and light decay, decoration can be integrated with illumination, and a highly practical light source material is provided and worthy of popularization and application in the market.

Description

technical field [0001] The present invention relates to a kind of translucent YAG (Y 3 Al 5 o 12 ) method for semi-free molding of luminescent thin ceramics. Background technique [0002] Luminescent materials are when a certain substance is excited (rays, high-energy particles, electron beams, external electric fields, etc.), the substance will be in an excited state, and the energy in the excited state will be released in the form of light or heat. Since Nichia has successfully prepared white light-emitting diodes and applied them in the field of lighting, it has a series of features such as small size, long life, rich colors, resistance to various harsh environments, energy saving and environmental protection, and high photoelectric conversion efficiency. The advantages are favored by people. At present, the process widely used in white light LED packaging is the traditional dispensing process and phosphor coating. The dispensing process is to mix yellow phosphor with...

Claims

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Application Information

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IPC IPC(8): H01L33/50H01S3/16
CPCH01L33/502H01L2933/0041H01S3/1685
Inventor 赵聪韩涛彭玲玲曹仕秀严其斌吴颜慧李皓楠
Owner CHONGQING UNIV OF ARTS & SCI
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