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Method for preparing sandwich-like Ce: YAG glass-ceramic sheet by tape casting method

A glass-ceramic and sandwich technology, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve problems such as not involved, and achieve the effects of reducing direct contact, low melting point, and prolonging service life

Inactive Publication Date: 2017-06-27
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current published literature and patents do not involve the use of sandwich-shaped Ce:YAG glass-ceramics as solid-state fluorescent materials for high-power LED packaging

Method used

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  • Method for preparing sandwich-like Ce: YAG glass-ceramic sheet by tape casting method
  • Method for preparing sandwich-like Ce: YAG glass-ceramic sheet by tape casting method
  • Method for preparing sandwich-like Ce: YAG glass-ceramic sheet by tape casting method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Will analyze pure ZnO, Sb 2 O 3 , Te 2 0, Li 2 0, K 2 O, Ce: YAG, press 12ZnO: 17Sb 2 O 3 :37Te 2 0:6Li 2 0:13K 2 The ratio of O:15Ce:YAG phosphor (molar ratio) is accurately weighed and placed in an agate mortar. The mixture is mixed and ground in the agate mortar with distilled water according to the mass ratio of 94:6 to prepare a slurry , Spread evenly on the K9 wafer glass sheet with a size of Φ50*3mm with a casting machine, set 0.2mm as the thickness of the casting blade, and control the casting speed to 0.04m / s, and dry at 200℃ in vacuum Dry in the box for 6 hours, cool and take it out. Cover the surface of the mixture with a Φ50*3mm K9 wafer glass sheet. The sandwich-shaped glass clip is placed in a resistance furnace and heated to 650°C for 1 hour, and then cooled with the furnace A transparent, low-melting, 6.2mm thick, sandwich-like glass-ceramic wafer model sheet with a transmittance of 72% is formed at 20°C (attached figure 1 ). Such as figure 1 As shown, th...

Embodiment 2

[0039] Will analyze pure ZnO, Sb 2 O 3 , Te 2 0, Li 2 0, K 2 O, Ce: YAG, press 16ZnO: 15Sb 2 O 3 :35Te 2 0:6Li 2 0:13K 2 O:15

[0040] The ratio of Ce:YAG phosphor (molar ratio) is accurately weighed and placed in an agate mortar. The mixture obtained after mixing and grinding in the agate mortar is mixed with distilled water according to the mass ratio of 94:6 to prepare a slurry. The casting machine is evenly coated on a 50*50mm square K9 white glass sheet, the spiral micrometer is set to 0.3mm as the thickness of the casting blade, and the casting speed is controlled to 0.04m / s. Dry for 6 hours in a vacuum drying oven at 200°C, cool and take out the cover sheet, directly put it in a resistance furnace, heat it to 620°C and keep it for 1 hour, then cool it down to 20°C to form a transparent low melting point with a thickness of 6.3mm and transparent Sandwich-shaped glass-ceramic square slices with a rate of 69% (attached image 3 ). Such as image 3 As shown, the glass-ceramic...

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Abstract

The invention relates to a method for preparing a sandwich-like Ce: YAG glass-ceramic sheet by a tape casting method. The method comprises the following steps: (1) a glass raw material is prepared from the following effective materials by mole fraction: 10 to 20% of ZnO, 5 to 17% of Sb2O3, 25 to 40% of TeO2, 6 to 13% of Li2O, 10 to 15% of K2O, and 5 to 20% of Ce: YAG phosphor; after the glass raw materials are thoroughly mixed and ground, a mixture is mixed with distilled water to obtain a mixed slurry; (2) the mixed slurry is uniformly coated on a white glass sheet having a thickness of 0.1 to 0.5 mm and matched with the size and shape of a light source by a tape casting machine; (3) the coated white glass sheet is dried at a temperature of 200 to 300 DEG C for 6 to 9 hours, the white glass sheet with the same shape and size is covered on the surface layer of the mixture after the water is evaporated, the sandwich-like glass clamping sheet is sintered at a temperature of 600 to 800 DEG C for 1 to 4 hours and then cooled to room temperature to form a sandwich-like Ce: YAG glass-ceramic sheet with a thickness of 0.4 to 1.5 mm. The sandwich-like glass-ceramic sheet with better photoelectric parameters is obtained by firing at a relatively low temperature.

Description

Technical field [0001] The invention relates to a preparation method of a sandwich-shaped Ce:YAG glass-ceramic sheet, which can be directly packaged and matched with a light source, simplifies the process, saves costs, and can realize large-scale industrial production. Background technique [0002] As a new generation of solid-state lighting sources that gradually replace incandescent lamps, fluorescent lamps and high-pressure gas discharge lamps, white LEDs have shown huge market potential and application prospects due to their high luminous efficiency, long life, energy saving, and environmental protection. The current commercial white LED is mainly realized by the combination of blue InGaN chip and yellow phosphor. Its working principle is that the blue light emitted by the InGaN chip is partially absorbed by the yellow phosphor, and the excited phosphor emits yellow light. The absorbed blue light passes through the phosphor layer and recombines with the yellow light emitted b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C4/12C03C27/10H01L33/50H01L33/56
CPCC03C10/00C03C4/12C03C27/10H01L33/502H01L33/56
Inventor 向卫东梁晓娟向润
Owner WENZHOU UNIVERSITY
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