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A kind of red luminous glass material and preparation method thereof

A glass material and red luminescent technology, applied in the field of rare earth luminescent materials, can solve the problems of luminous efficiency and service life decline, and achieve the effects of wide effective excitation range, simple synthesis method and high luminous efficiency

Inactive Publication Date: 2016-03-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method makes it possible to increase the luminous flux of a single LED chip, but at the same time it will also increase the temperature of the blue LED chip, which will reduce the luminous efficiency and service life of the red phosphor coated on the blue LED chip. decline

Method used

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  • A kind of red luminous glass material and preparation method thereof
  • A kind of red luminous glass material and preparation method thereof
  • A kind of red luminous glass material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The glass material of this embodiment is 4Na 2 O-6.8CaO-57GeO 2 -22SiO2 2 -0.2Eu 2 o 3 , the specific preparation method is:

[0019] (1) Accurately weigh Na according to molar percentage 2 CO 3 (99.99%), CaCO 3 (99.99%), GeO 2 (99.99%), SiO 2 (99.99%) and Eu 2 o 3 (99.99%) mixed in an agate mortar, grind for 0.5h to make it evenly mixed, put it into an alumina crucible and put it in a silicon carbon rod electric furnace for melting, the melting temperature is 1500 °C, and the melting time is 50 Minutes to obtain glass melt, after the melt is clarified, pour it into a preheated stainless steel mold to obtain NCGS: 0.2Eu 2 o 3 Glass;

[0020] (2) Quickly put the above glass into the muffle furnace that has been heated to the material transition temperature L (550°C) and keep it warm for 1 hour, then cool down to 100°C at a rate of 8°C / h, turn off the power, and automatically cool down to room temperature. 4Na can be obtained 2 O-6.8CaO-57GeO 2 -22SiO2 2 ...

Embodiment 2

[0023] The glass material of this embodiment is 4Na 2 O-6.7988CaO-57GeO 2 -22SiO2 2 -0.2Eu 2 o 3 -0.0012Bi 2 o 3 , the specific preparation method is:

[0024] (1) Accurately weigh Na according to molar percentage 2 CO 3 (99.99%), CaCO 3 (99.99%), GeO 2 (99.99%), SiO 2 (99.99%), Eu 2 o 3 (99.99%) and Bi 2 o 3 (99.99%) mixed in an agate mortar, ground for 0.5h to make it evenly mixed; after mixing evenly, put it into an alumina crucible and place it in a silicon carbon rod electric furnace for melting, the melting temperature is 1500°C, and the melting time is 20 Minutes to obtain molten glass, after the molten liquid is clarified, pour it into a preheated stainless steel mold to obtain NCGS:0.2Eu 2 o 3 , 0.0012 Bi 2 o 3 Glass;

[0025] (2) Quickly put the above glass into the muffle furnace which has been heated to the material transition temperature L (550°C) for 1 hour, then cool down to 100°C at a rate of 7°C / hour, turn off the power, and automatically co...

Embodiment 3

[0027] The glass material of this embodiment is 4Na 2 O-6.7982CaO-57GeO 2 -22SiO2 2 -0.2Eu 2 o 3 -0.0018Bi 2 o 3 , the specific preparation method is:

[0028] (1) Accurately weigh Na according to molar percentage 2 CO 3 (99.99%), CaCO 3 (99.99%), GeO 2 (99.99%), SiO 2 (99.99%), Eu 2 o 3(99.99%) and Bi 2 o 3 (99.99%) mixed in an agate mortar, ground for 0.5h to make it evenly mixed; after mixing evenly, put it into an alumina crucible and place it in a silicon carbon rod electric furnace for melting, the melting temperature is 1500°C, and the melting time is 40 Minutes to obtain molten glass, after the molten liquid is clarified, pour it into a preheated stainless steel mold to obtain NCGS:0.2Eu 2 o 3 , 0.0018 Bi 2 o 3 Glass;

[0029] (2) Quickly put the above glass into the muffle furnace that has been heated to the material transition temperature L (550°C) and keep it warm for 1 hour, then cool down to 100°C at a rate of 6°C / hour, turn off the power, and a...

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Abstract

The invention discloses a red luminescent glass material and a preparation method thereof ， The invention belongs to the technical field of rare earth luminescent materials. The red luminescent glass material is prepared from Na2O, CaO, GeO2, SiO2 and rare earth compounds. Its preparation method is to mix the components and melt to obtain molten glass; after the molten glass is clarified, pour it into a mold to obtain glass, and quickly put the glass into a muffle furnace that has been heated to the glass transition temperature to keep it warm , cooled to room temperature. The material can be excited by near-ultraviolet and blue light, and emit bright deep red fluorescence. It is expected to be applied to ultraviolet chip LEDs on the market, and to form white light LEDs with other green and blue phosphors. It can also be used in the current market. White light LEDs packaged with YAG:Ce to improve the current situation of low color rendering index and realize the wide application of white light LEDs.

Description

technical field [0001] The invention relates to a red luminescent glass material and a preparation method thereof, belonging to the technical field of rare earth luminescent materials. Background technique [0002] White-light-emitting diode (W-LED, white-light-emitting diode) as a junction semiconductor electroluminescent device, has low operating voltage, low power consumption, light weight, small size, long life, no radiation, no pollution, luminous A series of advantages such as fast response, shock resistance and safety have attracted much attention, and it is called the fourth generation of solid cold light source. At present, white light LEDs mainly realize white light in two ways: one is the fluorescent conversion type, that is, a single LED chip is combined with a phosphor to emit light; the other method is to use a combination of red, green, and blue LED chips to emit light. [0003] As a new generation of energy-saving and environment-friendly green lighting sour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/062C03C4/12C03B19/02
Inventor 余雪黎千跃徐旭辉王婷邱建备
Owner KUNMING UNIV OF SCI & TECH
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