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Glass ceramics, process for preparing same and remote warm white-light LED device

A technology of glass-ceramics and LED chips, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of lack of red components, restricted material application, low color rendering index, etc., achieve good thermal and chemical stability, and low cost , The effect of simple preparation process

Active Publication Date: 2017-01-04
福建省德化县腾兴陶瓷有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the glass-ceramics can emit yellow light under the excitation of blue light, the lack of red components in the emission spectrum results in a high color temperature and low color rendering index of the device, which restricts the application of this material in indoor lighting

Method used

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  • Glass ceramics, process for preparing same and remote warm white-light LED device
  • Glass ceramics, process for preparing same and remote warm white-light LED device
  • Glass ceramics, process for preparing same and remote warm white-light LED device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0030] A preparation method of glass-ceramic, characterized in that, making the above-mentioned double-layer remote fluorescent body comprises the following steps:

[0031] Step 1, the 21SiO 2 -18Sb 2 o 3 -9BaO-25Y 2 o 3 -24Al 2 o 3 -1CeO 2 (mol%) and powder rare earth oxide 0.5Pr 6 o 11 -0.2Sm 2 o 3 -0.8La 2 o 3 -0.5Tb 4 o 7 The powder raw materials are accurately weighed according to the proportion and put into the ball mill tank, then add agate balls of the same quality and different size as the mixture, and mill on the ball mill for 2 hours;

[0032]Step 2, move the uniformly mixed glass powder into a corundum crucible and heat it in a resistance furnace, and keep it at 1300°C for 3 hours to fully melt it;

[0033] Step 3, quickly pour the glass melt into a mold to form it, and put it into a resistance furnace for annealing at 650°C for 2 hours to eliminate internal stress, so as to obtain a bulk precursor glass;

[0034] Step 4: put the obtained precursor ...

specific Embodiment 2-4

[0040] The ratio of raw materials in Example 1 was changed (see Table 1, Table 2), and the process conditions were kept constant to obtain corresponding glass-ceramics respectively. The remote packaging technology is used to package the blue light chip with a rated power of 3W and an emission wavelength of 475nm and glass-ceramic glass into an LED device, and conduct a performance test on it. All remote glass-ceramic glass sheets emit orange light after being excited by the blue light chip, and the combination of the orange light and the blue light passing through the glass-ceramic produces bright warm white light.

[0041] Glass raw material proportioning in the present embodiment 2-4 of table 1

[0042]

[0043] Re raw material proportioning in the present embodiment 2-4 of table 2

[0044]

[0045]

[0046] refer to Figure 5 as shown,

[0047] A remote warm white LED device, comprising a lamp body 1, a blue light chip 2, a reflector 3, a light mixing cavity 4 a...

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Abstract

The invention relates to the technical field of LED white-light illumination, in particular to glass ceramics, a process for preparing the same and a remote warm white-light LED device. The glass ceramics, the process and the remote warm white-light LED device have the advantages that the transparent glass ceramics with Y3Mg2AlSi2O12:Ce, Re crystal grains which are uniformly inlaid in oxide glass matrixes can be obtained by the aid of the process; raw material ratios are adjusted, so that the refractive index of glass can be effectively regulated, the refractive index of the Y3Mg2AlSi2O12:Ce, Re crystal grains and the refractive indexes of the glass matrixes can be matched with one another, scattering can be reduced, and the transparency of the glass ceramics can be improved; the process for preparing the glass ceramics is simple, is low in cost, free of toxicity or pollution and excellent in thermal and chemical stability, and reaction conditions are easy to control; bright orange light can be emitted by the remote warm white-light LED device with the glass ceramics when the remote warm white-light LED device is excited by nanometer blue light, and the orange light and blue light of chips can be combined with each other to form warm white light.

Description

technical field [0001] The invention relates to the technical field of LED white light lighting, in particular to a glass-ceramic, a preparation process thereof and a remote warm white LED device. Background technique [0002] As the fourth generation of lighting, white LED has the advantages of high luminous efficiency, long life, fast response, energy saving and environmental protection, and its share in the world lighting market is expanding day by day. At present, the mainstream implementation of white LED is to use blue LED chip coupling Y 3 Al 5 o 12 : Ce 3+ Yellow fluorescent material, the organic silica gel mixed with phosphor powder is directly coated on the surface of the blue LED chip through the dispensing process. However, with the passage of time, the luminous efficacy of white LED products will gradually decrease, and the chromaticity will also drift. The reason is mainly due to the poor heat resistance and radiation resistance of the organic silica gel m...

Claims

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Application Information

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IPC IPC(8): C03C10/04H01L33/50H01L33/58
CPCC03C10/0036H01L33/502H01L33/505H01L33/507H01L33/58
Inventor 林泽斌陈文耀
Owner 福建省德化县腾兴陶瓷有限公司
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