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Luminescent glass and microcrystalline glass and preparation method thereof

A technology of glass-ceramics and luminescent glass, which is applied in the field of lighting engineering, can solve problems such as low light intensity and unstable physical and chemical properties, and achieve the effects of high solubility, favorable rare earth luminescence, and low phonon energy

Inactive Publication Date: 2012-09-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, some scholars have synthesized Ca 8 Mg(SiO 4 ) 4 Cl 2 : Eu 2+ , Dy 3+ , can emit white light under the excitation of ultraviolet light, but its physical and chemical properties are unstable
In addition, borosilicate, aluminate and phosphate glass luminescent materials doped or co-doped with rare earths are used instead of phosphors for white LEDs, which improves the light color quality and the stability of luminescent materials, but the light intensity is low.

Method used

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  • Luminescent glass and microcrystalline glass and preparation method thereof
  • Luminescent glass and microcrystalline glass and preparation method thereof
  • Luminescent glass and microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Rare earth doped SrO-TiO 2 -SiO 2 A method for preparing a system luminescent glass, comprising the steps of:

[0044] The selection of raw materials, according to the molar percentage of each component SrO: 30%, TiO 2 : 15%, SiO 2 : 40%, CaF 2 : 15%, Sm 2 o 3 : 0.5% weighed raw materials, set aside, of which, Sm 2 o 3 Introduced by means of addition;

[0045] SrO, TiO 2 , SiO 2 , CaF 2 and Sm 2 o 3 The raw materials were fully ground in the agate grinding machine, mixed evenly, poured into a platinum crucible, covered with a crucible lid, and put into a high-temperature furnace for melting at a melting temperature of 1430°C and kept for 2 hours to obtain molten glass;

[0046] The molten glass was poured into a heat-resistant mold preheated at 400 °C for 50 min to form it, then placed in a muffle furnace for annealing at 700 °C for 1 h, and cooled to room temperature with the furnace to obtain Sm 3+ doped SrO-TiO 2 -SiO 2 System luminous glass.

[0047...

Embodiment 2

[0049] Rare earth doped SrO-TiO 2 -SiO 2 A method for preparing a system luminescent glass, comprising the steps of:

[0050] The selection of raw materials, according to the molar percentage of each component SrO: 30%, TiO 2 : 15%, SiO 2 : 50%, SrF 2 : 5%, Tb 4 o 7 : 0.5% weighed raw materials, set aside, of which, Tb 4 o 7 Introduced by means of addition;

[0051] SrO, TiO 2 , SiO 2 , SrF 2 and Tb 4 o 7 The raw materials were fully ground in the agate grinding machine, mixed evenly, poured into a platinum crucible, covered with a crucible lid, and melted in a high-temperature furnace at a melting temperature of 1490 °C for 1.5 h to obtain molten glass;

[0052] The molten glass was poured into a heat-resistant mold preheated at 550 °C for 30 min to form it, then placed in a muffle furnace for annealing at 680 °C for 1.5 h, and cooled to room temperature with the furnace to obtain Tb 3+ doped SrO-TiO 2 -SiO 2 System luminous glass.

[0053] With embodiment 2 ...

Embodiment 3

[0055] Rare earth doped SrO-TiO 2 -SiO 2 The preparation method of the transparent luminescent glass-ceramics of the system comprises the following steps:

[0056] The selection of raw materials, according to the mole percentage of each component is: SrO: 26%, TiO 2 : 16%, SiO 2 : 45%, SrF 2 : 13%, Sm 2 o 3 : 0.25%, Tb 4 o 7 : 0.625%, weigh raw materials, set aside, of which, Sm 2 o 3 , Tb 4 o 7 Introduced by means of addition;

[0057] SrO, TiO 2 , SiO 2 , SrF 2 、Sm 2 o 3 and Tb 4 o 7 The raw materials were fully ground in the agate grinding machine, mixed evenly, poured into a platinum crucible, covered with a crucible lid, and melted in a high-temperature furnace at a melting temperature of 1480 °C for 1.5 h to obtain molten glass;

[0058] The molten glass was poured into a heat-resistant mold preheated at 500 °C for 40 min to form it, then placed in a muffle furnace for annealing at 680 °C for 1.5 h, and cooled to room temperature with the furnace;

[...

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Abstract

The invention discloses luminescent glass and microcrystalline glass which are used for a white light-emitting diode (LED) and a preparation method for the luminescent glass and the microcrystalline glass. The luminous efficiency of rear earth ions can be improved by doping a certain amount of fluoride AF2 (A is Mg, Ca, Sr or Ba) into rear earth-doped strontium oxide-titanium oxide-silicon oxide (SrO-TiO2-SiO2) system glass, wherein the rare earth ions can be introduced in the form of oxide or fluoride. The luminescent glass is prepared by a high-temperature melting method, and is crystallized by a proper hot treating system to obtain the system microcrystalline glass. The luminescent glass and the microcrystalline glass are high in luminescent performance and stable in physical and chemical performance, can be mainly used in white LED devices for solving the problems of low color stability, high aging possibility of fluorescent powder and packing resin and the like of the conventional white LED, and can also be used in other related fields of lighting, displaying, light sources, detection and the like.

Description

technical field [0001] The invention relates to the technical field of lighting engineering, in particular to a luminescent glass for a white LED, a glass-ceramic and a preparation method thereof. Background technique [0002] Light emitting diode (LED) is a semiconductor light-emitting device that can directly convert electrical energy into visible light. It has low operating voltage, low power consumption, high luminous efficiency, short luminous response time, pure light color, firm structure, Shock resistance, vibration resistance, stable and reliable performance, light weight, small size, low cost and other characteristics, will replace incandescent lamps and fluorescent lamps as the fourth generation of lighting sources, and is the most promising electric light source in the 21st century. [0003] However, commercial white LEDs currently on the market mostly use phosphor powder to emit white light, and are encapsulated with epoxy resin. In practical applications, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C4/12
Inventor 李宏叶庆
Owner WUHAN UNIV OF TECH
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