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Green light emitting glass used for ultraviolet LED and preparation method thereof

A technology of luminescent glass and green light, which is applied in the field of green luminescent glass for ultraviolet LEDs and its preparation, can solve the problems of high production cost of light-emitting devices, unstable phosphor emission, and easy aging, and achieve good chemical stability and thermal stability. Stability, good light transmission, low cost effect

Active Publication Date: 2013-11-27
OCEANS KING LIGHTING SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, in view of the defects of the prior art LED light-emitting devices that the epoxy resin encapsulating the LED is easy to age at high temperature, the fluorescent powder is unstable in emitting light in a high-temperature environment, and the manufacturing cost of the light-emitting device is high, a A green light-emitting glass for ultraviolet LEDs that can replace epoxy resin packaged chips, has high luminous intensity, stable luminescence, and low cost

Method used

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  • Green light emitting glass used for ultraviolet LED and preparation method thereof
  • Green light emitting glass used for ultraviolet LED and preparation method thereof
  • Green light emitting glass used for ultraviolet LED and preparation method thereof

Examples

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Embodiment 1

[0025] Embodiment 1, green light-emitting glass 55CaO·20Al for ultraviolet LED 2 o 3 25SiO2 2 0.01Tb 2 o 3

[0026] Preparation method: weigh analytically pure calcium carbonate (CaCO 3 ) 16.6g, alumina (Al 2 o 3 )6.15g, silicon dioxide (SiO 2 )4.53g and terbium oxide (Tb 4 o 7 ) 0.01g, put the weighed raw materials into a platinum crucible after grinding and mixing them evenly in a mortar, then put the platinum crucible with the raw materials into a high-temperature box furnace, melt the glass at 1700°C for 1 hour The melt is poured into a cast iron mold, pressed into a transparent glass, and then the transparent glass is placed in an annealing furnace at 95% N 2 +5%H 2 (Volume percentage, the same below) is heated to 650°C in a reducing atmosphere, kept for 20 hours and then cooled to room temperature to prepare 55CaO·20Al 2 o 3 25SiO2 2 0.01Tb 2 o 3 Glowing glass that emits green light.

Embodiment 2

[0027] Example 2, green light-emitting glass 48CaO·17Al for ultraviolet LED 2 o 3 25SiO2 2 10Tb 2 o 3

[0028] Preparation method: weigh analytically pure calcium carbonate (CaCO 3 ) 10.02g, alumina (Al 2 o 3 ) 3.61g, silicon dioxide (SiO 2 )3.13g and terbium oxide (Tb 4 o 7 ) 7.79g, put the weighed raw materials into a corundum crucible after grinding and mixing them evenly in a mortar, then put the corundum crucible with the raw materials into a high-temperature box furnace, melt the glass at 1650°C for 0.5 hours The melt is poured into a cast iron mold, pressed into a transparent glass, and then the transparent glass is placed in an annealing furnace at 95% N 2 +5%H 2 48CaO·17Al can be prepared by raising the temperature to 950°C in a reducing atmosphere, keeping it warm for 3 hours and then cooling to room temperature. 2 o 3 25SiO2 2 10Tb 2 o 3 Glowing glass that emits green light. Such as figure 2 Shown is the emission spectrum of the luminescent glass ...

Embodiment 3

[0029] Example 3, green light-emitting glass 50CaO·20Al for ultraviolet LED 2 o 3 28SiO2 2 0.5CeO 2 1.0Tb 2 o 3

[0030] Preparation method: weigh analytically pure calcium carbonate (CaCO 3 ) 14.34g, alumina (Al 2 o 3)5.84g, silicon dioxide (SiO 2 )4.82g, cerium oxide (CeO 2 )0.24g and terbium oxide (Tb 4 o 7 ) 1.07g, grind and mix the weighed raw materials evenly in a mortar, put them into a corundum crucible, then put the corundum crucible with raw materials into a high-temperature box furnace, and melt it at 1650°C for 1 hour. The glass melt is poured onto cast iron molds and pressed into clear glass. Then put the transparent glass in the annealing furnace, 95%N 2 +5%H 2 50CaO·20Al can be prepared by raising the temperature to 900°C in a reducing atmosphere, keeping it warm for 5 hours and then cooling to room temperature. 2 o 3 28SiO2 2 0.5CeO 2 1Tb 2 o 3 Glowing glass that emits green light. Such as image 3 Shown is the emission spectrum of the lum...

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Abstract

A green luminescent glass for ultraviolet LED and a preparation method for glass are disclosed. The preparation method includes: weighing raw materials of CaCO 3 , Al 2 O 3 , SiO 2 , CeO 2 and Tb 4 O 7 respectively and mixing the raw materials evenly; melting the raw materials at 1500ˆ¼1700°C for 0.5ˆ¼3 hours and then molding to form a glass; annealing the formed glass in reducing atmosphere with temperature of 650ˆ¼1050°C for 3ˆ¼20 hours; and cooling the glass to room temperature to obtain the green luminescent glass for ultraviolet LED. The green luminescent glass for ultraviolet LED prepared according to the preparation method of the disclosure has advantages of high luminous intensity, uniformity and stability.

Description

【Technical field】 [0001] The invention relates to a luminescent glass and a preparation method thereof, in particular to a green luminescent glass for an ultraviolet LED and a preparation method thereof. 【Background technique】 [0002] LED lighting device has become a new type of light-emitting element because of its advantages of small solidification, shock resistance, energy saving, high luminous efficiency, strong applicability, and no pollution, and can be prepared into various devices suitable for variable environments. In particular, the third-generation semiconductor material gallium nitride is used as the semiconductor lighting source, and the power consumption is only 1 / 10 of that of ordinary incandescent lamps at the same brightness, and the life span reaches more than 100,000 hours. Therefore, LEDs are widely used in optoelectronics and lighting engineering technical fields such as various indications, displays, decorations, backlights and general lighting. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/12C03C3/095
CPCC03C3/062C03C4/12C03C3/095
Inventor 周明杰马文波时朝璞
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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